Answer:
n ≤ 6
Step-by-step explanation:
2n - 15 ≤ -3
Add 15 to both sides.
2n ≤ 12
Divide both sides by 2.
n ≤ 6
The solution of this inequality is any number less than or equal to 6. There is an infinite number of solutions. Since you are asked to pick two numbers that are solutions, I assume you have choices that were given. Look at the choices, and pick any number less than 6 and 6 itself if it is a choice.
The answer for which two numbers are solutions of 2n - 15≤ = -3
Is n≤ 6
What is the direct variation equation iffy varies directly with x and y = 12 when x= 6
Answer:
y = 2x
Step-by-step explanation:
Given that y varies directly as x then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition y = 12 when x = 6
k = [tex]\frac{y}{x}[/tex] = [tex]\frac{12}{6}[/tex] = 2, hence
y = 2x ← equation of variation
Analyze the diagram below and complete the in destructions that follow
Answer:
option D
8√2
Step-by-step explanation:
Given in the question a right angle triangle,
hypotenuse = x
height = 8
We can use trigonometry identity to solve x
we know that,
sinФ = opposite / hypotenuse
sin(45) = 8 / x
x = 8 / sin(45)
x = 8√2
PLEASE HELP 14 POINTS
[tex] \frac{27}{30} \times 100\% \\ = 90\%[/tex]
Approximately 90 percent voted for her
A rectangle's length and width are in a ratio of 5:2. The area is 160 square centimeters. What are the length and width?
If you could solve this please do so asap
Answer: The length and width are 20 square centimeters and 8 square centimeters
Explain: 20:8 can be reduced to 5:2 as a ratio. 20 times 8 equals 160.
Answer:
length = 20 cm and width = 8 cmStep-by-step explanation:
l - length
w - width
length and width are in a ratio of 5:2
[tex]\dfrac{l}{w}=\dfrac{5}{2}[/tex] cross multiply
[tex]2l=5w[/tex] divide both sides by 2
[tex]l=\dfrac{5w}{2}[/tex]
the area is 160cm²
[tex]lw=160[/tex]
We have the system of equations:
[tex]\left\{\begin{array}{ccc}l=\dfrac{5w}{2}&(1)\\lw=160&(2)\end{array}\right[/tex]
Substitute (1) to (2):
[tex]\left(\dfrac{5w}{2}\right)(w)=160\\\\\dfrac{5w^2}{2}=160\qquad\text{multiply both sides by 2}\\\\5w^2=320\qquad\text{divide both sides by 5}\\\\w^2=64\to w=\sqrt{64}\\\\w=8[/tex]
Put the value of w to (1):
[tex]l=\dfrac{(5)(8)}{2}=\dfrac{40}{2}=20[/tex]
bill and julio are selling wrapping paper for a school fundraiser. customers can buy rolls of plain wrapping paper and rolls of shiny wrapping paper. bill sold 8 rolls of plain wrapping paper and 10 rolls of shiny wrapping paper for a total of $328. julio sold 9 rolls of plain wrapping paper and 2 rolls of shiny wrapping paper for a total of $184. find the cost each of one roll of plain wrapping paper and one roll of shiny wrapping paper
Answer:
Plain rolls: $16
Shinny rolls: $20
Step-by-step explanation:
So, we have 2 equations to start with, let p = plain rolls and s = shinny rolls:
1) 8p + 10s = 328
2) 9p + 2s = 184
We need to isolate one variable, usually I go for the one with the lowest multiplicative... so let's go for the '2s' and isolate the s from equation 2.
2s = 184 - 9p
3) s = (184 - 9p) / 2
And let's place that s equivalent into the first equation:
8p + 10 (184 - 9p)/2 = 328
8p + 5(184 - 9p) = 328
8p - 45p + 920 = 328
-37p = -592
p = 16
Then we go into any of the 3 equations to get the value of s. Let's take the 3rd equation, it will be simpler:
s = (184 - 9p) / 2 = (184 - 9*16) / 2
s = (184 - 144)/2 = 40/2 = 20
Then last step, we enter the values for s and p in one of the first equations to validate it. We haven't worked with first equation, so let's use that one:
8p + 10s = 328
8 (16) + 10 (20) = 328
128 + 200 = 328
328 = 328
Confirmed!
Help please I can’t solve
Answer:
IT would be 6 because 10 X 6 = 60 just take away the 0
Step-by-step explanation:
PLEASE HELP BEEN HERE for 30 minutes. GET A EASY 30 POINTS!
Replace x with 3 and solve for Y.
If y equals 8 in both equations, then it is a solution.
y = -5(3) +1 = -15+1 = -14
-14 does not equal 8 , so it is not a solution.
No because -5• 3 +1 does not equal 8 makings it impossible for it to work for that equation. Then 3•3-2 doesn’t equal 8 either so (3,8) is not a solution for these equations
You have violin lessons every fourth day and singing lessons every
fifth day. Today you have both lessons. In how many days will you
have both lessons on the same day again?
Answer:
Every 20 days.
Step-by-step explanation:
I just did 5 times 4 to get the answer
In 20 days there will be both lessons on the same day again.
What is combination?A combination is a mathematical technique that determines the number of possible arrangements in a collection of items where the order of the selection does not matter.
Given:
Violin class= 4th day
singing lesson= 5th day
So, the possible number of days on which we have both violin and singing class
=4 x 5
=20 days
Hence, 20 days there will be both lessons on the same day again.
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Can someone please help me
Answer:
Step-by-step explanation:
abs(x)>0
This statement is false because what happens when x = 0? For all other instances, the statement is true, but not for 0.
Zero is not greater than itself.
The school is t blocks from Jim's house. The library is twice as far as the school is from Jim's house. How far is the library?
Answer:
2t blocks
Step-by-step explanation:
We measure these distances from Jim's house.
The school is t blocks from Jim's house. Twice that is 2t blocks. Thus, the library is 2t blocks from Jim's house.
I have a circular piece of fabric I am going to make a tablecloth. The radius of the fabric is 2 meters. What is the area of the tablecloth I can make
Answer:
[tex]4\pi[/tex]
or
12.57
Step-by-step explanation:
I have a circular piece of fabric I am going to make a tablecloth. The radius of the fabric is 2 meters. What is the area of the tablecloth I can make
Essentially, you are attempting to find the area of a circle with a radius of 2 meters.
The formula for an area of a circle is [tex]\pi r^2[/tex], or pi times radius squared.
Plugging in 2 meters as your radius, that gets your answer to be [tex]4\pi[/tex], or 12.57 in decimal.
you have $47 to spend at the music store. Each cassette tape costs $5 and each CD cost $10. write a linear inequality that represent this situation. let x represent the number of tapes and y the number of CDs
Answer:
47 is greater than or equal to 5x+10y
Step-by-step explanation:
you can't spend more than $47 but you can spend less than or equal to that amount.
Answer:5x+10y=47
Step-by-step explanation:
Given
$47 money needed to spend
Each cassette tape cost $5
and each CD cost $10
Given no of cassette be x and no of CD be y
Thus cost of x cassette is 5x
cost of Y CD's 10y
Total cost=5x+10y
5x+10y=47
Please explain your answer as well. THX!!
Answer:
1
Step-by-step explanation:
sec(x)*cos(x) + cos(x)-1/(sec(x))
We know that sex(x) = 1/(cos(x))
substitute it in our expression.
1/(cos(x)) * cos(x) + cos(x) - 1/(1/cos(x)) = 1+cos(x) - cos (x)= 1
ANSWER
A. 1
EXPLANATION
The given trigonometric expression is
[tex] \sec(x) \cos(x) + \cos(x) - \frac{1}{ \sec(x) } [/tex]
Recall and use the following reciprocal identities.
[tex] \frac{1}{ \sec(x) } = \cos(x) [/tex]
and
[tex] \sec(x) = \frac{1}{ \cos(x) } [/tex]
When we apply these identities, we get
[tex] \frac{1}{ \cos(x) } \times \cos(x) + \cos(x) - \cos(x) [/tex]
This simplifies to:
[tex]1 + 0 = 1[/tex]
The correct choice is A
Which statements are correct regarding mathematics in the Egyptian, Chinese, and Babylonian cultures? Check all the apply.
A.) Both the Egyptian and Chinese number systems use base 10.
B.)The Babylonian tablets have all the solution methods clearly shown.
C.)All three cultures had unique symbolism to represent their numbers.
D.)There are two primary sources for ancient Egyptian mathematics.
E.)Ancient Chinese mathematicians did not attempt to solve systems of linear equations.
Answer:
A,C,D
Step-by-step explanation:
Answer:
The following are the correct statements regarding mathematics in the Egyptian, Chinese, and Babylonian cultures:
A - Both Egyptian and Chinese number systems use base 10.
C - All three cultures had unique symbolism to represent their numbers(Earlier symbols were used to depict things)
D - There are two primary sources for ancient Egyptian mathematics(The primary sources are the Rhind Papyrus and the Moscow Papyrus)
I understand what they are asking, but I am wondering how you describe the verbal description and the algebraic representation?
Answer:
hmmm
Step-by-step explanation:
hmmm
The speed limit on a highway is 55 mph. A speed sensor showed that a car went 900 ft in 8 s. Is the car traveling over the speed limit? Explain.
Answer:
900 feet / 5,280 = 0.1704545... miles
8 seconds / 3,600 = 0.0022222222 hours
0.1704545 miles / 0.0022222222 hours = 76.704525767 miles per hour
The car is well over the speed limit
Step-by-step explanation:
suppose that f(x) = x^2 and g(x) = 2/5 x^2 which statement best compares the graph of g(x) with the graph of f(x) A.the graph of g(x) is the graph of f(x) compressed vertically and flipped over the x-axis b.the graph of g(x) is the graph of f(x) compressed vertically c. the graph of g(x) is the graph of f(x) stretched vertically and flipped over the x-axis
Answer:
b.the graph of g(x) is the graph of f(x) compressed vertically
Step-by-step explanation:
The given functions are
[tex]f(x)=x^2[/tex]
and
[tex]g(x)=\frac{2}{5}x^2[/tex]
This is a transformation in the form
[tex]y=a*f(x)[/tex] where [tex]a=\frac{2}{5}[/tex]
Since 0<a<1, the graph of f(x) is compressed vertically by a factor of
[tex]\frac{2}{5}[/tex]
A function assigns the value of each element of one set to the other specific element of another set. The correct option is B.
What is a Function?A function assigns the value of each element of one set to the other specific element of another set.
When the graph of the two function f(x) and g(x) is plotted, then it can be observed that the graph of g(x) is the graph of f(x) compressed vertically.
Hence, the correct option is B.
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Write the number 7 ones 9 tens 9 hundreds
Answer:
997
From right to left, the place values are, ones, tens, hundreds, thousands, etc.
The number with '7 ones', '9 tens', and '9 hundreds' is written as 997 in numeral form, by combining the values of each digit based on their place value.
When writing the number that consists of '7 ones', '9 tens', and '9 hundreds', we are dealing with a three-digit number where each place value represents a power of 10. To construct the number, we consider the value each digit represents:
The '9 hundreds' means 9 × 100 (which is 900).
The '9 tens' means 9 × 10 (which is 90).
The '7 ones' means 7 × 1 (which is 7).
Adding these values together, we have 900 (hundreds) + 90 (tens) + 7 (ones), which equals 997. This is the decimal representation of the number expressed by the student.
Therefore, the number 7 ones 9 tens 9 hundreds written in numeral form is 997.
In the United States, birth weights of newborn babies are approximately normally distributed with a mean of μ = 3,500 g and a standard deviation of σ = 500 g.
What percent of babies born in the United States are classified as having a low birth weight (< 2,500 g)? Explain how you got your answer.
answer:The z-score for 2,500 g is –2.
According to the empirical rule, 95% of babies have a birth weight of between 2,500 g and 4,500 g.
5% of babies have a birth weight of less than 2,500 g or greater than 4,500 g.
Normal distributions are symmetric, so 2.5% of babies weigh less than 2,500g.
The z-score for 2,500 g is –2.According to the empirical rule, 95% of babies have a birth weight of between 2,500 g and 4,500 g.5% of babies have a birth weight of less than 2,500 g or greater than 4,500 g.Normal distributions are symmetric, so 2.5% of babies weigh less than 2,500g.
2.5% of babies weigh less than 2,500g.
Empirical ruleEmpirical rule states that for a normal distribution, 68% of the values are within 1 standard deviation from the mean, 95% of the values are within 2 standard deviation from the mean and 99.7% are within 3 standard deviation from the mean.
Given that mean (μ) = 3,500 g and a standard deviation of σ = 500 g.
95% of babies have a birth weight of between two standard deviation = 2,500 g and 4,500 gHence 2.5% of babies weigh less than 2,500g.
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Suppose that the local sales tax rate is 7% and you purchase a car for 11,100 how much tax is paid?
Answer:
11877
Step-by-step explanation:
11100 * 7% = 777
11100 + 777 = 11877
When you multiply by 7%, you get the amount of additional tax. You add this to the original amount to get the answer.
Explain how to determine whether two known pairs of points are on the same line.
Answer:
Sample response: Use the slope formula three times: once for the first pair of points, then for the second pair of points, then for one point from each pair. If all three slopes are the same, then all the points lie on the same line.
Which did you include in your response:
Use the slope formula three times.If the slopes of both pairs are equal, then the lines may be parallel.If all three slopes are equal, including the slope using one point from each pair, then all the points coincide on the same line.The way in which a person can accurately determine whether two known pairs of points are on the same line is:
The use of the slope formula three different times.One of the ways through which a person can accurately determine whether two known points are on the same line when using a linear graph is to make use of the slope formula.
With this in mind, we can see that this slope formula is used to find the different pair of points on the graph to check if they all lie on the same line.
In conclusion, we can come to the determination that:
The lines are likely parallel if the slopes on the two pairs are equalIf the slopes are all equal, then all the points meet on the same line.Read more about slope formula here:
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twice the difference of a numbrr and 8 is equal to 2.twice the difference of a number and 8 is equal to 2
Answer:
2(x-8)=8
x=12
Step-by-step explanation:
The equation for the given statement is 2(x-8)=2.
The given statement "Twice the difference of a number and 8 is equal to 2
What is an equation?An equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.
Now, the difference between a number and 8 can then be written as 'x-8'. Twice that amount would be 2(x-8). If it's equal to 2, you can say 2(x-8)=2.
Therefore, the equation for the statement is 2(x-8)=2.
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If the graph of y= |x| is translated so that the point (1, 1) is moved to (4,1), what is the equation of the new graph?
Answer:
The new equation is y= (x-3)
Step-by-step explanation: we know that the point (1, 1) is moved to (4,1).
So, the rule of the translation is: [tex](x,y) -----> (x+3, y)[/tex]
that means the translation is 3 units to the right
Answer:
[tex]y=|x-3|[/tex]
Step-by-step explanation:
The parent absolute function is
[tex]y=|x|[/tex]
The graph of y= |x| is translated so that the point (1, 1) is moved to (4,1). It means the rule of translation is
[tex](x,y)\rightarrow (x+3,y)[/tex]
it means the graph of y=|x| translated 3 units right. So, the new vertex of the function is (3,0).
The vertex form of an absolute function is
[tex]y=|x-h|+k[/tex]
The new vertex of the function is (3,0). Substitute h=3 and k=0 in the above equation.
[tex]y=|x-3|+0[/tex]
[tex]y=|x-3|[/tex]
Therefore, the required equation is y=|x-3|.
Which expression equivalent to 9x^5 y^16 over 45x^5 y^4
the answer after simplify is:
[tex] \frac{ 9{x}^{5} {y}^{16} }{45 {x}^{5} {y}^{4} } = \frac{ {y}^{12} }{5} [/tex]
Answer:
[tex]\large\boxed{\dfrac{1}{5}y^{12}}[/tex]
Step-by-step explanation:
[tex]\text{Use}\ \dfrac{a^n}{a^m}=a^{n-m}\\\\\dfrac{9x^5y^{16}}{45x^5y^4}=\dfrac{9\!\!\!\!\diagup^1}{45\!\!\!\!\!\diagup_5}x^{5-5}y^{16-4}=\dfrac{1}{5}y^{12}[/tex]
The surface area of which composite figure is the sum of the areas of eight triangular faces?
Atwo rectangular pyramids joined at their congruent bases
Btwo rectangular pyramids joined at two congruent lateral faces
Ctwo triangular prisms joined at their congruent bases
Dtwo triangular prisms joined at two congruent lateral faces PLZ HELP ME ;C
The answer is B)Two rectangular pyramids joined at two congruent lateral faces
Answer:
Option B. is the answer.
Step-by-step explanation:
As you can see from the figure attached, Rectangular pyramid has five faces. Four triangular and one rectangular face.
In this question we have to find the a composite figure which has eight triangular faces.
Therefore, by adding two rectangular pyramids by common rectangular base we can get the composite figure with eight triangular faces.
Option B. will be the answer.
What is the distance between the points (1, 3) and (9, 9)?
a. 8 units
b. 10 units
c. 6 units
d. 12 units
the answer is 10 units
[tex]distance = \sqrt{(9 - 1) ^{2} + (9 - 3) {}^{2} } \\ = \sqrt{ {8}^{2} + {6}^{2} } \\ = 10[/tex]
The distance between points (1, 3) and (9, 9) will be 10 units so option (b) will be correct.
What are coordinates?A pair of numbers that employ the horizontal and vertical distinctions from the two reference axes to represent a point's placement on a coordinate plane. typically expressed by the x-value and y-value pairs (x,y).
For instance, in this case (5,3), 5 will represent the x and 3 the y.
(9,0) is another illustration, where 9 stands for x and 0 for y.
Coordinates are always written in the form of small brackets the first term will be x and the second term will be y.
The distance between two points (x₁,y₁) and (x₂,y₂) is given by
[tex]d = \sqrt {\left( {x_1 - x_2 } \right)^2 + \left( {y_1 - y_2 } \right)^2 }[/tex]
So,
Distance between (1, 3) and (9, 9)
[tex]d = \sqrt {\left( {1- 9 } \right)^2 + \left( {3 -9 } \right)^2 }[/tex]
d = √(64 + 36) = 10 units.
Hence, The distance between points (1, 3) and (9, 9) will be 10 units
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Find u•v when u= 12i+4j and v=15i-5j
Answer:
180i^2 - 20j^2
Step-by-step explanation:
u.v
(12i+4j) . (15i-5j)
12i(15i-5j) + 4j(15i-5j)
180i square -60ij + 60ij-20j square
180i^2 - 20j^2
The value of the dot product of the two vectors is u · v = -160.
What are vectors?The product of vectors can refer to several different operations, including the dot product, cross product, and scalar multiplication.
Dot Product:
The dot product of two vectors u and v is a scalar given by the formula:
u · v = ||u|| ||v|| cos θ
We have,
To find the dot product of two vectors, we need to multiply their corresponding components and add up the results:
u · v
= (12i + 4j) · (15i - 5j)
= 12i · 15i + 12i · (-5j) + 4j · 15i + 4j · (-5j)
= 180i^2 - 60ij + 60ij - 20j² [since i² = j² = -1]
= 180(-1) - 20(-1) [since ij = ji = 0]
= -160
Therefore,
The value of the dot product of the two vectors is u · v = -160.
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which of the following is true about the expression5*1/4
Answer:
C. It represents the product of two rational numbers and its equivalent to a rational number.
Step-by-step explanation:
5 is a natural number, a real number and a rational number.
[tex]\frac{1}{4}[/tex] is a real number and a rational number.
The product of 5 × [tex]\frac{1}{4}[/tex] = 1.25 which is also a rational number in addition to being a real number.
Answer:
The correct answer is option C.
Step-by-step explanation:
It s given that 5 * 1/4
To find the correct answer
The given expression is 5 * 1/4
Here 5 is a rational number and 1/4 is a rational number
5 * 1/4 = 5/4
The number 5/4 is a rational number.
5/4 represents the product of two rational numbers and is equivalent to a rational number.
Therefore the correct answer is option C
Divide 4200 by a multiple of 10 so that the quotient is also a multiple of 10
Answer:
4200 divided by 10
Step-by-step explanation:
To make 4200 a multiple of ten after dividing it by a multiple of ten, we first find the number of 5's in 4200 to see how many 10's go into 4200. Since 4200 = 6*7*2*2*5*5, we see that there are 2 fives. This means that there are two tens too. Since we have to keep 4200 a multiple of ten after dividing it by another 10. So the only possible way to do that is dividing 4200 by 10.
Dividing 4200 by the power of 10, 100, results in the quotient 42, which is also a multiple of 10. This is achieved by moving the decimal point two places to the left in the number 4200 due to the two zeros in the power of 10.
Explanation:In this mathematics problem, you are asked to divide 4200 by a multiple of 10 such that the result, or quotient, is also a multiple of 10. The key to this problem lies in understanding the concept of dividing by powers of 10.
When you divide a number by a power of 10, you move the decimal point to the left by as many places as there are zeros in the power of 10. So if you wanted to divide 4200 by a multiple of 10 so that the result is also a multiple of 10, you might choose 100 (10^2) as your divisor. Why? Because there are two zeros in the power of 10, which means you move the decimal point two places to the left in the number 4200.
So when you divide 4200 by 100, you get 42 which is a multiple of 10. Therefore, 4200 divided by a multiple of 10 (100 in this case) gives a quotient (42) that is also a multiple of 10.
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Gayle and Jerry had some money. After their mother gave each of them $20, Gayle had twice as much money as Jerry and Jerry had $50 less than Gayle. How much money did Gayle have at first?
Answer:
$100
Step-by-step explanation:
To find out how much money Gayle initially had, we solved the two equations provided by the problem: G + 20 = 2(J + 20) and J + 20 = G + 20 - 50. Solving these equations, it was found that Gayle initially had $90.
Explanation:The question is asking us to figure out how much money Gayle had before their mother gave them each $20. Let's denote the amount of money Jerry initially had as J and the amount of money Gayle initially had as G. According to the problem, after the mother gave them $20 each, Gayle had twice the amount of Jerry's, which mathematically translates to G + 20 = 2(J + 20). Likewise, Jerry had $50 less than Gayle, which can be written as J + 20 = G + 20 - 50. Thus we are given a system of two equations that we can solve simultaneously.
Both equations can be simplified to G = 2J + 20 and J = G - 50. By substituting J = G - 50 in the first equation, we can solve for G to get G = 2(G - 50) + 20 which further simplifies to G = $90. Thus, Gayle initially had $90.
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