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velikii [3]
2 years ago
10

Please help !! question is shown below in the picture

Mathematics
1 answer:
NNADVOKAT [17]2 years ago
5 0

Answer:

C

Step-by-step explanation:

Given x and y vary directly then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition x = 20 , y = 10 then

10 = 20k ( divide both sides by 20 )

\frac{10}{20} = \frac{1}{2} = k

y = \frac{1}{2} x ← equation of variation → C

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Olivia paid $28 for a pair of boots that sold regularly for $80. What
marissa [1.9K]

35% because 35% of 80 is 28

4 0
3 years ago
1. The volume of the cylinder is 78 cubic cm, find the volume of the cone.<br>​
harkovskaia [24]

Answer:

The volume of a cylinder = 78 \mathrm{cm}^{3}78cm3

Let us substitute the volume of cylinder in the formula.

The formula for volume of a cone is V=\frac{\pi r^{2} h}{3}V=3πr2h                    (1)

The formula for volume of a cylinder is V=\pi r^{2} hV=πr2h              (2)

Substituting V=78V=78 in equation (2), we get,

\begin{gathered}\begin{array}{c}{V=\pi r^{2} h} \\{78=\pi r^{2} h}\end{array}\end{gathered}V=πr2h78=πr2h

Given that the cone has the same radius and height of that of the cylinder, let us substitute 78=\pi r^{2} h78=πr2h in equation (1)

\begin{gathered}\begin{array}{l}{V=\frac{\pi r^{2} h}{3}} \\{V=\frac{78}{3}} \\{V=26}\end{array}\end{gathered}V=3πr2hV=378V=26

Thus, the volume of a cone with the same radius and height of a cylinder is 26 \mathrm{cm}^{3}26cm3 .

4 0
3 years ago
Read 2 more answers
Consider the quadratic function f(x) = x2 – 5x + 12. Which statements are true about the function and its graph? Select three op
iVinArrow [24]

The statement that are true about the function and its graph is "The graph of the function is a parabola " , the correct option is (b) .

In the question ,

it is given that ,

the quadratic function is f(x) = x² – 5x + 12 .

for x = -10 ,

f(-10) = (-10)² – 5(-10) + 12

= 100 + 50 + 12

= 162

option(a) is false .

the graph of the quadratic function is shown below .

form the graph we can see that the graph is a parabola ,

and the function opens upwards ,

the graph does not contain the points (20,-8) and (0,0)

Therefore , The statement that are true about the function and its graph is "The graph of the function is a parabola " , the correct option is (b) .

The given question is incomplete , the complete question is

Consider the quadratic function f(x) = x² – 5x + 12. Which statement is true about the function and its graph?

(a) The value of f(–10) = 82

(b) The graph of the function is a parabola.

(c) The graph of the function opens down.

(d) The graph contains the point (20, –8).

(e) The graph contains the point (0, 0).

Learn more about Functions here

brainly.com/question/13159926

#SPJ1

8 0
1 year ago
Trigonometry question-how do you do it???
kompoz [17]

Answer:

45

Step-by-step explanation:

it wont let me put the

4 0
4 years ago
Hi my name is chaitra so I have a test coming up and I'm having trouble solving three digit by three digit multiplication and tw
arlik [135]

Answer:

So 2 digit multiplication is like this

   1

  23

x 45

  -----

   115

   920

   -----

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first yo multiply the 5 and the 3 and then you multiply the 5 by the 2 then you will get 15 for the first and you put the 1 on top of the 1 now 5 times 2 plus 1 is 11 so yo put the 11 down at the bottom. now you put a zero at the bottom of the answer will be  23 x 45 = 1035

5 0
3 years ago
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