Answer:
The solution of given equation for x is (0.16 + i 1.14) , (0.16 - i 1.14)
Step-by-step explanation:
Given as :
The quadratic equation is as 3 x² - x + 4 = 0
Since The given equation is quadratic
∵, Standard quadratic equation is ax² + bx + c = 0
Now, x = [tex]\frac{-b\pm \sqrt{b^{2} - 4\times a\times c}}{2\times a}[/tex]
Comparing the equation
i.e x = [tex]\frac{-(-1)\pm \sqrt{(-1)^{2} - 4\times 3\times 4}}{2\times 3}[/tex]
or, x = [tex]\dfrac{1\pm \sqrt{(1-48)}}{6}[/tex]
Or, x = [tex]\dfrac{1\pm \sqrt{(-47)}}{6}[/tex]
Or, x = [tex]\dfrac{1\pm i6.85}{6}[/tex]
Or, x = (0.16 + i 1.14) , (0.16 - i 1.14)
So, The solution of given equation for x = (0.16 + i 1.14) , (0.16 - i 1.14)
Hence, The solution of given equation for x is (0.16 + i 1.14) , (0.16 - i 1.14) . Answer
At a video rental store, 434 movies were returned in less than two days. That number of movies is 62% of the total number of movies rented last week.
Answer:
700
Step-by-step explanation:
Hope this helps!
The problem is a mathematical exercise in determining the total number of movies rented from the provided percentage of those returned. By setting up an equation and solving it, we find that the total number of movies rented was 700.
Explanation:The student's question is on a mathematical concept related to percentages and determining the whole from a percentage portion. From the information provided, 434 movies, which represent 62% of the total number of movies rented last week, were returned. To calculate the total number of movies rented, we can let the total be x. With this, the equation representing the scenario is 0.62x = 434.
By solving for x, we get x = 434 / 0.62. After the calculation, we find that the total number of movies rented last week was 700. Therefore, the store originally rented out 700 movies.
Remember that when dealing with percentages, the percentage value (in this case, 62%) must be converted into decimal form before performing any calculation. This is done by dividing the percentage by 100, thus 62% becomes 0.62. For clarity, here's the step-by-step procedure:
Convert the percentage (62%) to a decimal (divide by 100): 0.62.Set up the equation where 62% of total movies rented (x) equals the number of movies returned (434).Solve for x by dividing the number of returned movies by the decimal percentage: x = 434 / 0.62.Conclude that 700 is the total number of movies rented out.
if 8 and 15 are sides to a right triangle, whats the missing side?
Answer:
17
Step-by-step explanation:
a[2]+b[2]=c[2]
8*8+15*15=hypotenuse.
64+225=289
[tex]\sqrt{x} 289[/tex]
hypotenuse=17
Tina and penny share 36 sweets in the ratio 1:2. How many sweets does penny get?
Answer:
24 sweets
Step-by-step explanation:
Total amount of sweets is 36
Goal to divide into 3 (1+2) and give out the sections.
36/3 = 12
Tina sweets = 12(1) = 12
Penny sweets = 12(2) = 24
12:24
1:2
Answer:
24
Step-by-step explanation:
2/3 ×36/1 3 ÷3=1 and 36÷3=12 and 12×2=24
I need help on this question ASAP
Answer:
15: 1
Step-by-step explanation:
Please see attached picture for full solution.
How to solve 17=x+9 what is x
Answer:
x=8
Step-by-step explanation:
17=x+9
-9 -9
8=x
Answer:
x=8
Step-by-step explanation:
17-9=8
8+9=17
[tex]If 180º\ \textless \ a\ \textless \ 270º[/tex] and [tex]cos a= -8/17[/tex] what is sin(−α)?
Enter your answer as a fraction in simplest form, like this: 3/14
Answer:
[tex]\frac{15}{17}[/tex]
Step-by-step explanation:
Look at the photo below for the details.
:)
Your local Pizza restaurant offers free delivery with an expected 15% tip for the delivery person. Your pizza will cost 15.95 + 7% sales tax. What is your total cost?
The total cost which includes tip, food cost without tax and sales tax for the considered situation is 19.63 bucks approximately.
How to find the percentage from the total value?Suppose the value of which a thing is expressed in percentage is "a'
Suppose the percent that considered thing is of "a" is b%
Then since percent shows per 100 (since cent means 100), thus we will first divide the whole part in 100 parts and then we multiply it with b so that we collect b items per 100 items(that is exactly what b per cent means).
Thus, that thing in number is
[tex]\dfrac{a}{100} \times b[/tex]
For this case, we're specified that:
Pizza cost = 15.95 +7% of tax on 15.95 bucks
Tip = 15% of pizza cost
Total cost = Pizza cost + tip
7% of 15.95 is: [tex]\dfrac{15.95}{100} \times 7 = 1.1165[/tex] bucks
Thus, pizza cost = The (15.95 + 1.1165) = 17.0665
Tip price = 15% of 17.0665 = [tex]\dfrac{17.0665}{100} \times 15 \approx 2.56[/tex] bucks.
Thus, total cost ≈ 17.0665 + 2.56 ≈ 19.63 bucks
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Suppose you know that ∠S and ∠Y are complementary and that m∠S = 5(m∠Y) − 180°. Find m∠Y.
Answer:
45°
Step-by-step explanation:
We know ∠ Y +∠ S = 90
and ∠ S= 5 ( ∠ Y)-180 so
leave S alone for both
90- ∠Y = 5 ( ∠Y) -180
270 = 6( ∠Y )
45= ∠ Y
∠S = 5( 45) -180
=225-180
=45
Final answer:
The measure of angle Y (m∠Y) is 45°, following the equation derived from the facts that angles S and Y are complementary and m∠S equals 5 times m∠Y minus 180°.
Explanation:
If ∠S and ∠Y are complementary angles, then the sum of their measures is 90°. According to the given information, m∠S = 5(m∠Y) − 180°. Since m∠S + m∠Y = 90°, we can set up the equation:
5(m∠Y) − 180° + m∠Y = 90°
Combining like terms to solve for m∠Y:
6(m∠Y) = 90° + 180°
6(m∠Y) = 270°
m∠Y = 270° / 6
m∠Y = 45°
The measure of angle Y, m∠Y, is 45°.
what is 4th grade distributive property
the Distributive Property uses two operations: multiplication and addition. It is an essential key to success in algebra. The Distributive Property allows you to "distribute" a number to each of the addends within parentheses. It offers another way of solving a problem.
Answer:
A math property.
Step-by-step explanation:
Say you have a two big number and you don't know the answer on top of your head. You use distributive property to break it apart.
2 Independent Practic
CA CC 8.EE.7, 8.EE.7b
Members of the Wide Waters Club pay
$105 per summer season, plus $9.50 each
time they rent a boat. Nonmembers must
pay $14.75 each time they rent a boat.
How many times would a member and a
non-member have to rent a boat in order
to pay the same amount?
Answer:
20
Step-by-step explanation:
Let x represent the number of rentals. Then the cost will be the same when ...
105 +9.50x = 14.75x
105 = 5.25x
105/5.25 = x = 20
Each would have to rent a boat 20 times in order to pay the same amount.
( 2/3 a^2b^2)^2·(−3ab)^4
The answer to that problem is:
[tex]36 {a}^{8} {b}^{8} [/tex]
Hope This Helps! :)
Stefan sells Jin a bicycle for $124 and a helmet for $19. The total cost for Jin is 130% of what Stefan spent originally to buy the bike and helmet. How much did Stefan spend originally? How much money did he make by selling the bicycle and helmet to Jin?
Answer: he spent $100.10 and gained $42.90
Step-by-step explanation:
complete the steps to simplify (y^4/3•y^2/3)^-1/2. Apply the product of powers property to the expression inside the parentheses, then choose the equivalent expression.
A. (y^2)^-1/2
B. (y^8/3)^-1/2
C. (y^2/3)^-1/2
Option A
[tex]\left(y^{\frac{4}{3}} \cdot y^{\frac{2}{3}}\right)^{\frac{-1}{2}} = \left(y^{2}\right)^{\frac{-1}{2}}[/tex]
Solution:
Given expression is:
[tex]\left(y^{\frac{4}{3}} \cdot y^{\frac{2}{3}}\right)^{\frac{-1}{2}}[/tex]
Product of powers property:
The product of powers property tells us that when you multiply powers with the same base you just have to add the exponents
Which is represented as,
[tex]a^m.a^n = a^{m+n}[/tex]
Therefore, the given expression becomes,
[tex]\left(y^{\frac{4}{3}+\frac{2}{3}}\right)^{\frac{-1}{2}}[/tex]
Now add the exponents, we get
[tex]\left(y^{\frac{4+2}{3}}\right)^{\frac{-1}{2}}[/tex]
Simplify the above expression
[tex]\left(y^{\frac{6}{3}}\right)^{\frac{-1}{2}}[/tex]
Simplify the exponent of y, we get
[tex]\left(y^{2}\right)^{\frac{-1}{2}}[/tex]
Thus Option A is correct
Answer:
The answer is A
Step-by-step explanation:
does anyone know how to help me with the letters in math, i dont understand it, and i need help, someone please? if you can can you tell me in step by step?
Answer:
Step-by-step explanation:
Letters are variables and those variable can store a number
Ex: x=5 y=2
evaluate : 3x+2y
we know that x is 5, so we know that 3x would be 15
we know that y is 2, so we know that 2x would be 4
then it says to add 3x and 2y, we would add 15 and 4 to get 19
(This is a very simple example, when you get older, the expression would be much more confusing.
A bag contains 6 red marbles, 6 white marbles, and 4 blue marbles. Find P(red or blue).
A. 2/3
B. 3/2
C. 5/8
D. 3/4
Answer:
I think its B. because if you put 6/4and reduce it it would be 3/2
Step-by-step explanation:
Answer:
C. 5/8
Step-by-step explanation:
P(red) = 6/16
p(blue) = 4/16
p(red or blue) = P(red) + p(blue) = (6+4)/16 = 10/16 = 5/8
A 12 ft. ladder is being placed against a 10 ft.
wall. At what angle of elevation should the
ladder be placed so that the top of the ladder
touches the top of the wall?
Answer:
Step-by-step explanation:
Height of wall = 10ft
Length of ladder = 12ft
Angle of elevation be x
Sin x = opp/hyp
Sin x = wall height/length of ladder
Sin x = 10/12
Sin x = 0.83
X = Sin-¹ (0.83)
X = 56.44°
A parking lot with an area of 9600ft^2 has a 200ft fence built along two adjacent sides of lengths x and y. If you were asked to find the dimensions of the parking lot, what equations would you used for the perimeter and area of the parking lot?
Answer:
[tex]\left\{\begin{array}{l}x+y=200\\ \\xy=9,600\end{array}\right.[/tex]
Step-by-step explanation:
The diagram shows rectangular parking lot with sides of [tex]x[/tex] feet and [tex]y[/tex] feet.
1. The area of the rectangle is
[tex]A=Length\times Width=xy.[/tex]
If the area of the parking lot os [tex]9,600\ ft^2,[/tex] then
[tex]xy=9,600[/tex]
2. A parking lot has a [tex]200\ ft[/tex] fence built along two adjacent sides of lengths [tex]x[/tex] and [tex]y[/tex], then
[tex]x+y=200[/tex]
3. The system of two equations describing this situation is
[tex]\left\{\begin{array}{l}x+y=200\\ \\xy=9,600\end{array}\right.[/tex]
Let f(x) = 3x -7 and g(x) = -2 - 6 find (fog) (4)
show all steps
15. Find m∠DEC (the picture is not drawn to scale).
Answer:
m∠DEC = 123°
Step-by-step explanation:
First we need to solve for x the equation: x = (x - 45) + (x-12)
x = (x - 45) + (x-12) ⇔ x = 2x -57 ⇔ 0 = x - 57 ⇔ x = 57
since m∠DEC = 180 - x then m∠DEC = 180 - 57 = 123
A shopping mall parking garage charges $2 for the first half hour and $1.20 for each additional half hour (even if it is under 30 minutes). Write and solve and inequality to find how many hours you can park in the garage if you have $8 in cash
You can park in the garage for 5 hours 30 minutes
Solution:
Given that, shopping mall parking garage charges $2 for the first half hour and $1.20 for each additional half hour (even if it is under 30 minutes)
Therefore,
Cost for first half an hour = $ 2
Cost for each additional half an hour = $ 1.20
Let "x" be the number of each additional half hour
Therefore, total cost to pay is given as:
Total cost = Cost for first half an hour + (Cost for each additional half an hour)(number of each additional half hour)
Total cost = 2 + 1.20x
Given you have $ 8 in cash
[tex]8 = 2 + 1.20x\\\\1.20x = 8 - 2\\\\1.20x = 6\\\\x = \frac{6}{1.20}\\\\x = 5[/tex]
Total hours parked = first half an hour + 5
Thus you can park in the garage for 5 hours 30 minutes
What do you call the tending of rabbits
The tending of rabbits, known as rabbit farming or rabbit husbandry, involves providing adequate resources for the rabbits to mature and reproduce. This could be for the purposes of obtaining meat, fur, or wool from the rabbits. It's also important to monitor for signs of infection to prevent communicable diseases.
Explanation:The tending or caring of rabbits is commonly referred to as rabbit husbandry or rabbit farming. This involves the raising and breeding of rabbits, often for their meat, fur, or sometimes, for their wool in the case of certain breeds like the Angora Rabbit.
Aspects of rabbit husbandry can include providing an adequate food source, healthcare, and a suitable living environment. It is imperative to watch out for any signs of infection, as some diseases can be transmitted from the rabbits to humans through eating or handling infected rabbits. Some such infections could be vector-borne, passing through ticks or flies, or potentially through aerosols in a laboratory setting.
These caretaking measures help ensure that a young rabbit can develop into a healthy adult rabbit, capable of reproducing or providing the intended resource, whether it be meat, fur, or wool.
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17)
- What is the slope of the line defined by the equation y = 2x + 7?
A)2/7
B) 2
C)7/2
D)7
Answer:
The slope is 2
Step-by-step explanation:
y = 2x + 7
Comparing with y = mx + c
Where m is the slope = 2
Answer:
B
Step-by-step explanation:
The equation of line is y=2x+7
Comparing it with the standard equation y=mx+c
Where m is the slope and c is the y-intercept
Hence we get
Slope,m =2
Choose the system of equations which matches the following graph:
a- x + 2y = −10
3x − y = 12
b- x − 2y = −10
3x − y = 12
c- x + 2y = −10
3x + y = 12
d- x − 2y = −10
3x + y = 12
Answer:
Option a
- x + 2y = −10
3x − y = 12
Step-by-step explanation:
step 1
Find the equation of the line with negative slope
we know that
The line with negative slope has a y-intercept at (0,-5) and passes through the point (2,-6)
Find the slope
[tex]m=(-6+5)/(2-0)=-\frac{1}{2}[/tex]
The equation in slope intercept form is
[tex]y=-\frac{1}{2}x-5[/tex]
Convert to standard form
Multiply by 2 both sides
[tex]2y=-x-10\\x+2y=-10[/tex]
step 2
Find the equation of the line with positive slope
The line with positive slope has a x-intercept at (4,0) and passes through the point (2,-6)
Find the slope
[tex]m=(-6-0)/(2-4)=3[/tex]
The equation of the line in point slope form is equal to
[tex]y-y1=m(x-x1)[/tex]
we have
[tex]m=3\\point\ (4,0)[/tex]
substitute
[tex]y-0=3(x-4)[/tex]
Convert to standard form
[tex]y=3x-12\\3x-y=12[/tex]
therefore
The system of equations is
- x + 2y = −10
3x − y = 12
Are there any lines that cannot be written in standard form? If so which ones?
Answer:
Any equation that cannot be written in standard form form in nonlinear.
Step-by-step explanation:
Considering the equation in standard form as
[tex]ax + by = c[/tex]
For example here is the sample equation [tex]3x - 2y = 4[/tex] is in standard form.
Very much every linear equation can be written in standard form.
There are certain rules that need to be followed for any lines to be in standard form, violation of which would not let certain lines to be written in standard form. These rules are:
[tex]a[/tex] or [tex]b[/tex] can be zero, but not both at the same time. [tex]a, b,[/tex] and [tex]c[/tex] are integers[tex]a\ge \:0[/tex][tex]a, b,[/tex] and [tex]c[/tex] have no common factors other than 1Any equation that cannot be written in this form in nonlinear.
Keywords: linear equation, standard form, nonlinear equation
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Under a dilation centered at the origin, the point (-4 , 3) has image at (8 , -6) The dilation is _____
Answer:
2
Step-by-step explanation:
see the image for the explanation
(sum of interior angles = 10 (n-2) where n is the number of sides of the polygon)
1. what is the sum of the interior angles of a pentagon?
2. if the sum of the interior angles of a polygon equals 1080, then determine the sides of the polygon.
3. what is a polygon called if the sim of its interior angles equals 6840?
4. what is the sum of the interior angles of an octagon?
Answer:
Step-by-step explanation:
1) pentagon; n= 5
Sum of interior angles = 180*(n -2) = 180* (5-2) = 180 * 3 = 540
2) Sum of interior angles of a polygon = 1080
180*(n-2) = 1080
n - 2 = 1080/180
n -2 = 6
n = 6+2
n = 8
Polygon has 8 sides
3) Sum of interior angles of a polygon = 6840
180*(n-2) = 6840
n - 2 =6840/180
n -2 = 38
n = 38 + 2
n = 40
Polygon has 40sides
4)Sum of interior angles of an octagon = 180*(n-2) = 180* (8-2) = 180 - 6 = 1080
The sum of the interior angles of the 10-sided polygon on the left is 1440 °.
The answer is : 1440
How many sides does a cube have
a cube has 6 sides reeeeeeeeeeeeeeeeee
a cube has 6 sides
1 in the front
1 in the back
1 on top = 6 sides
1 below
1 to one side
1 to another side
a 0.311 kg tennis racket moving 30.3 m/s east makes an elastic collision with a 0.0570 kg ball moving 19.2 m/s west. find the velocity of the tennis ball after the collision.
Answer: 146.12 m/s (to the right)
Step-by-step explanation:
The Conservation of Linear Momentum principle states that the initial momentum [tex]p_{i}[/tex] (before the elastic collision) must be equal to the final momentum [tex]p_{f}[/tex] (after the elastic collision):
[tex]p_{i}=p_{f}[/tex] (1)
Being:
[tex]p_{i}=m_{r}V_{r} + m_{b}V_{b}[/tex]
[tex]p_{f}=m_{r}U_{r} + m_{b}U_{b}[/tex]
Where:
[tex]m_{r}=0.311 kg[/tex] is the mass of the racket
[tex]V_{r}=30.3 m/s[/tex] is the velocity of the racket before the collision
[tex]m_{b}=0.057 kg[/tex] is the mass of the ball
[tex]V_{b}=-19.2 m/s[/tex] is the velocity of the ball before the collision
[tex]U_{r}=0 m/s[/tex] is the velocity of the racket after the collision (assuming it is at rest after hitting the ball)
[tex]U_{b}[/tex] is the velocity of the ball the collision
So, we have the following:
[tex]m_{r}V_{r} + m_{b}V_{b}=m_{r}U_{r} + m_{b}U_{b}[/tex] (2)
Finding [tex]U_{b}[/tex]:
[tex]U_{b}=\frac{m_{r}V_{r} + m_{b}V_{b}}{m_{b}}[/tex] (3)
[tex]U_{b}=\frac{(0.311 kg)(30.3 m/s) + (0.057 kg)(-19.2 m/s)}{0.057 kg}[/tex] (4)
Finally:
[tex]U_{b}=146.12 m/s[/tex] This is the velocity of the ball after the collision
Answer:
38m/s
Step-by-step explanation:
There are 32 girls and 36 boys that will form soccer teams. Each team will have 9 players. Extra players will be substitutes. How many teams can be formed? How many players will be a substitute?
The number of 9-players team formed = 7 teams.
The number of players for substitute = 5 substitute players.
Step-by-step explanation:
step 1: The total number of soccer players = 32 girls + 36 boys = 68 players.
step 2: Each team should have 9 players.
step 3:The number of 9-player teams that can be formed = 68/9 = 7 and Remainder is 5.
step 4: Therefore, The number of 9-players team formed = 7 teams.
The number of players for substitute = 5 substitute players.
The Atlanta Traffic Commission needs to know how much space the Ferris Wheel takes up. What is the AREA formula for a circle? Show your work to find the AREA of the Ferris Wheel. Don't forget to add your square units! pls helppppppp
Answer:
The Area of the Ferris wheel is 31400 Square feet
Step-by-step explanation:
The AREA formula for a circle:
The Area formula for the circle is [tex]\pi r^2[/tex]
where
r is the radius of the circle
The area of the Ferris Wheel:
The Height of the Ferris wheel = 200 foot
Here height of the Ferris wheel is the diameter
So the Diameter = 200
Then Radius =[tex]\frac{200}{2}[/tex] = 100 foot
Now the area of the Ferris wheel is
=> [tex]\pi (100)^2[/tex]
=> [tex]\pi \times 10000[/tex]
=> 31400 square feet