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3 years ago

The variables x and y vary directly. Write an equation that relates x and y, when x = 4 and y = 16

Mathematics

2 answers:

Nesterboy [21]3 years ago

8 0

Answer:

y = 4x

Step-by-step explanation:

When we say that x and y "vary directly", we mean that they have the relationship: y = kx, where k is a "constant of proportionality".

Here, we want to know what k is, so we plug 4 in for x and 16 in for y:

y = kx

16 = k * 4

k = 16/4 = 4

Thus, our equation is y = 4x.

yaroslaw [1]3 years ago

5 0

X5-y5
I think I really don’t understand the question can I have Brainliest!!:)

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3 years ago

The surface area of the cone is 43.75pie cm^2. What is the slant height of the cone and the diameter is 5

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If the diameter of the cone is 5, then the radius of it will be half that, or 2.5, thus

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4 years ago

What polynomial should be subtracted from the polynomial y^2–5y+1 to get the difference equal to: y^2

fomenos

<h3>Answer:</h3>

-5y +1

<h3>Step-by-step explanation:</h3>

Let the polynomial to be subtracted be represented by Q. Then you want ...

... (y^2 -5y +1) -Q = y^2

... (y^2 -5y +1) = y^2 +Q . . . . add Q

... (y^2 -5y +1) -y^2 = Q . . . . .subtract y^2

... -5y +1 = Q . . . . . . . . . . . . . simplify

The polynomial to be subtracted is -5y +1.

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3 years ago