The sin(a + b), cos(a + b) and tan(a + b) for angles a and b where sin a = 12/13 and sin b = -15/17 respectively, can be calculated using the formulas for the sine, cosine, and tangent of the sum of two angles. The results are -252/221 for sin(a+b), 56/221 for cos(a+b) and -4.5 for tan(a+b).
Explanation:The given sin values represent the sides of the right triangles in terms of opposite/hypotenuse. Given we are in the second and third quadrants, where cos values are negative, we can use Pythagoras' Theorem, for example, to find cos a = -√(1 - sin²a) = -√(1 - (12/13)²) = -5/13 and analogously, we obtain cos b = -√(1 - sin²b) = 8/17.
Using the formulas for the sine, cosine, and tangent of the sum of two angles:
sin (a + b) = sin a cos b + cos a sin b, we obtain sin(a + b) = 12/13*(-8/17) + 5/13*(-15/17) = -252/221.For cos (a + b) = cos a cos b - sin a sin b, cos(a + b) = -5/13*-8/17 - 12/13*-15/17 = 56/221.And lastly for tan (a + b) = sin (a + b) / cos (a + b), tan(a + b) = -252/221 / 56/221 = -4.5.
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an airplane takes off at a rate of 2,000 feet per minute. how long will it take the plane to reach 50,000 feet
The dimensions of a rectangular bin are consecutive integers. If the volume of the bin is 4896 cubic inches, what are the dimensions of the bin?
cubed root of 4896 = 16.98
round to 17
17-1 = 16
17 +1 = 18
16* 17 *18 = 4896
bin is 16 in x 17 in x 18 in
Answer:
The dimension of the rectangle is [tex]16\times 17\times 18[/tex]
Step-by-step explanation:
Given : The dimensions of a rectangular bin are consecutive integers. If the volume of the bin is 4896 cubic inches.
To find : What are the dimensions of the bin?
Solution :
The dimensions of a rectangular bin are consecutive integers.
Let the consecutive integers are x,x+1,x+2
So let, length, l=x
Breadth b=x+1
Height h=x+2
The volume of the bin is
[tex]V=l\times b\times h[/tex]
[tex]4896=x\times (x+1)\times (x+2)[/tex]
[tex]4896=(x^2+x)(x+2)[/tex]
[tex]4896=x^3+2x^2+x^2+2x[/tex]
[tex]x^3+3x^2+2x-4896=0[/tex]
Plot the equation graphically to find the value of x.
Refer the attached figure below.
The value of x is 16.
So, Length is l=16
Breadth is b=x+1=16+1=17
Height is h=x+2=16+2=18
The dimension of the rectangle is [tex]16\times 17\times 18[/tex]
which shows the set(s) the number 2.77 is an element of?
The correct answer is option a. 2.77 is an element of the set real numbers.
To determine which set(s) the number 2.77 is an element of, let's analyze each option:
1. Real numbers: The set of real numbers includes all rational and irrational numbers. This means any number that can be placed on the number line, including integers, fractions, and decimals. Since 2.77 is a decimal number, it is indeed a real number.
2. Real numbers and natural numbers: While 2.77 is a real number, natural numbers are a subset of real numbers that consist of all positive integers (1, 2, 3, ...). Since 2.77 is not a positive integer, it is not a natural number. Therefore, this option is incorrect because 2.77 is not a natural number.
3. Natural numbers and whole numbers: As mentioned, natural numbers are positive integers. Whole numbers include all natural numbers and the number 0 (0, 1, 2, 3, ...). Since 2.77 is neither a natural number nor a whole number, this option is incorrect.
4. Null set: The null set (or empty set) contains no elements. If 2.77 were in the null set, it would imply that the null set is not empty, which contradicts the definition of the null set. Therefore, this option is incorrect.
The complete question is
"Which shows the set(s) the number 2.77 is an element of?
a. real numbers
b. real numbers and natural numbers
c. natural numbers and whole numbers
d. null set"
How many questions can be missed on a 100 question test to get 80%?
Solve the following equation. Then place the correct number in the box provided. Leave answer in terms of a mixed number.
6(2P - 1) > 5P + 2
Answer:
p>[tex]\frac{8}{7}[/tex]
Step-by-step explanation:
The equation is 6(2 P-1) > 5 P +2
6(2 P-1)> 5 P+2
6×2 P-6×1> 5 P+2
12 P-6> 5 P+2
12 P - 5 P > 2+6
7 P > 8
P > [tex]\frac{8}{7}[/tex]
P is greater than[tex]\frac{8}{7}[/tex]
Hence, the correct answer is p greater than [tex]\frac{8}{7}[/tex]
EVEN OR ODD FUNCTIONS HELP! PLS!
Which of the graphs represent an even function? I think it's the first one.
Even and Odd Functions U3L2
1. f(x)=-x^2/x^4-25
2. The function is neither even nor odd.
3. The graph is symmetric about the origin.
4. 2ND graph from the question's photos (looks like mcdonalds logo)
youre welcome !
True or false: the sum of relative frequencies in a distribution always equals 1.
Determine the axis of symmetry and the vertex of the given function. y = 2x2 − 12x + 21 Axis of symmetry: x = Vertex: ( , )
Answer:
The vertex of the function is (h,k)=(3,3)
The axis of symmetry is x=3.
Step-by-step explanation:
Given : Function [tex]y=2x^2-12x+21[/tex]
To find : Determine the axis of symmetry and the vertex of the given function.
Solution :
The quadratic function is in the form, [tex]y=ax^2+bx+c[/tex]
On comparing, a=2 , b=-12 and c=21
The vertex of the graph is denote by (h,k) and the formula to find the vertex is
For h, The x-coordinate of the vertex is given by,
[tex]h=-\frac{b}{2a}[/tex]
[tex]h=-\frac{-12}{2(2)}[/tex]
[tex]h=\frac{12}{4}[/tex]
[tex]h=3[/tex]
For k, The y-coordinate of the vertex is given by,
[tex]k=f(h)[/tex]
[tex]k=2h^2-12h+21[/tex]
[tex]k=2(3)^2-12(3)+21[/tex]
[tex]k=18-36+21[/tex]
[tex]k=3[/tex]
The vertex of the function is (h,k)=(3,3)
The x-coordinate of the vertex i.e. [tex]x=-\frac{b}{2a}[/tex] is the axis of symmetry,
So, [tex]x=-\frac{b}{2a}=3[/tex] (solved above)
So, The axis of symmetry is x=3.
The stage manager of a school play creates a rectangular acting area of 42 square yards. String lights will outline the acting area. To the nearest whole number, how many yards of string lights does the manager need to enclose this area?
If four times a certain number, increased by 6 is equal to 94, what is the number?
If x represents the number, then which of the following equations could be used to solve the problem?
Answer: Hello mate!
"four times a certain number increased by 6 is equal to 94"
is equivalent to: 4*x + 6 = 94
where x represents the number.
Now we would want to find the value of x.
4*x + 6 = 94
4*x = 94 - 6 = 88
x = 88/4 = 22
then the value of the number x that makes the statment true is x = 22.
in the first 33 days of class, Daunte lost 22 pencils. If Daunte keeps losing pencils at the same rate for 60 days of class, how many pencils will he lose?
Logan opened a savings account 21 years ago with a deposit of $3,471.52. The account has an interest rate of 3.1% compounded monthly. How much interest has Logan earned?
Which statement is true statement about rotation?
A. The image is smaller than the preimage.
B. The image overlaps the preimage.
C. The image is larger than the preimage
D. The image and preimage are congruent.
Answer:
The correct option is D. The image and preimage are congruent.
Step-by-step explanation:
Let us understand the this concept with the help of an example.
Consider the figure 1:
From the figure 1, it is clear that the size of image doesn't change.
Thus, option A and C are invalid.
Or we can say that, the image and preimage remain the same.
Therefore, the correct option is D. The image and preimage are congruent.
Whats the area of a circle with the diameter of 20 feet.
When you are comparing two sets of data, and one set is strongly skewed and the other is symmetric, which measures of the center and variation should you choose for the comparison?
When comparing two sets of data, choose the median for skewed data and mean with standard deviation for symmetric data.
When comparing two sets of data where one is strongly skewed and the other is symmetric, for the comparison, it is advisable to choose the median as the measure of the center for the skewed data since it is resistant to outliers, and the mean and standard deviation for the symmetric data to give an overall representation of the data.
Three collinear point
The ages of mark and adam add up to 28 years total. mark is 20 years older than adam. how many years old is adam
Adam is 4 years old. This conclusion is reached by setting up a system of equations based on the information that Mark and Adam's ages add up to 28 years and Mark is 20 years older than Adam.
The student is asking how old Adam is, given that the total age of Mark and Adam is 28 years, and Mark is 20 years older than Adam. To solve this, we can set up a system of equations. Let Mark's age be represented by M and Adam's age be represented by A. The two equations based on the given information would be:
M + A = 28 (The sum of their ages is 28)M = A + 20 (Mark is 20 years older than Adam)Now, substituting the second equation into the first one, we get:
A + 20 + A = 28
This simplifies to:
2A + 20 = 28
Subtracting 20 from both sides, we have:
2A = 8
Dividing both sides by 2, we find:
A = 4
So, Adam is 4 years old.
12-5x-4kx=y solve for x
need hlp wit these math prob
see attached picture for answer:
for the format you need it would be 1.5x +-y = 12
The probability that a driver is speeding on a stretch of road is 0.27. what is the probability that a driver is not speeding?
Answer: 0.73 since 1 - 1.27 = 0.73 so the drivers probability of not speeding is 0.73 hope it helps
If probability that a driver is speeding on a stretch of road is 0.27 then probability that a driver is not speeding is 0.73.
What is Probability?It is a branch of mathematics that deals with the occurrence of a random event.
Given that the probability that a driver is speeding on a stretch of road is 0.27.
Probability(Speeding)=0.27
We need to find the probability that a driver is not speeding.
Probability(Not Speeding)=1-Probability(Speeding)
One minus zero point two seven
=1-0.27
We get zero point seven three
=0.73
Hence, if probability that a driver is speeding on a stretch of road is 0.27 then probability that a driver is not speeding is 0.73.
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HELP PLEASE!!! WORTH 8 points!!!!
Point Q is the midpoint of GH. GQ=2x+3, and GH=5x−5 .
What is the length of GQ?
Enter your answer in the box.
____ units
The length of GQ is 25/3 units.
Explanation:To find the length of GQ, we need to equate GQ to GH and solve for x. Since Q is the midpoint of GH, the lengths GQ and QH are equal. Therefore, we have the equation:
2x + 3 = 5x - 5
Subtract 2x from both sides:
3 = 3x - 5
Add 5 to both sides:
8 = 3x
Divide both sides by 3:
x = 8/3
To find the length of GQ, substitute the value of x back into 2x + 3:
GQ = 2(8/3) + 3
GQ = 16/3 + 3
GQ = 16/3 + 9/3
GQ = 25/3 units
Samantha has two pieces of cloth. One piece is 72 inches wide and the other piece is 90 inches wide. She wants to cut both pieces into strips of equal width that are as wide as possible. How wide should she cut the strips
Solve y over negative 2 + 5 = 13.
Verify the identity. sin quantity x plus pi divided by two = cos x
Find the difference of functions s and r shown below. r(x) = –x² + 3x
s(x) = 2x + 1 (s – r)(x) =
-x^2+3x-2x+1
(-x^2+3x)-2x+1
(2x+1)-(x^2 + 3x)
2x+1-x^2+3x
Answer:
(2x + 1) - (–x² + 3x) is difference .
Step-by-step explanation:
Given : r(x) = –x² + 3x and s(x) = 2x + 1
To find : Find the difference of functions s and r .
Solution : We have given that r(x) = –x² + 3x and s(x) = 2x + 1.
Difference :
(s – r)(x) = s(x) - r(x)
=(2x + 1) - (–x² + 3x)
= 2x +1 + x²-3x
= x²-x +1.
Therefore, (2x + 1) - (–x² + 3x) is difference .
The difference of the function is (2x+1)-(x^2 + 3x)
Difference of functions
Given the following functions
r(x) = –x² + 3x
s(x) = 2x + 1
Taking the difference of the function will give:
(s – r)(x) = 2x - 1 - (-x^2 + 3x)
Expand
(s – r)(x) = 2x - 1 + x^2 - 3x
(s – r)(x) = x^2 - x - 1
Hence the difference of the function is (2x+1)-(x^2 + 3x)
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Indicated operation on 1 2/3 + 5 3/8
The sum of the interior angles of a triangle is_______. 360° 180° 270° 540°
Solve the inequality. x - 5 ≤ -6
A. x ≤ -1
B. x ≤ -6/5
C. x ≤ - 11
D. x ≤ 11
Stanley ran a 5 kilometer race in 30 minutes.What was his speed in kilometers per hour?Round to the nearest tenth