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Hunter-Best [27]

3 years ago

12

Maurice has 76 postcards in all. The ratio of the number of postcards he has received to the number of postcards he has bought i

s 3:1. How many more postcards has Maurice received than bought?

1 answer:

nexus9112 [7]3 years ago

4 0

Answer:

50 but if its not an estimate 50.6 i would try 50 first

Step-by-step explanation:

also brainiest plz

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If y varies inversely as x2 and y = 3 when x = 2, find the equation that connects x and y.

Bond [772]

<h3>Answer: y = 12/(x^2)</h3>

============================================================

Explanation:

"y varies inversely as x^2" means y = k/(x^2) for some constant k.

Plug in (x,y) = (2,3) and solve for k

y = k/(x^2)

3 = k/(2^2)

3 = k/4

3*4 = k

12 = k

k = 12

The original equation updates to y = 12/(x^2)

As a check, plugging in x = 2 should lead to y = 3

y = 12/(x^2)

y = 12/(2^2)

y = 12/4

y = 3 ... we get the proper y value, so the answer is confirmed.

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3 years ago

What are functions?<br> What is a functions?

Andrei [34K]

Answer:

A function is a input value that is paired with an output value

Step-by-step explanation:

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3 years ago

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Adding and subtracting functions g(x) = 2x f (x) = −2x^3 + 2x Find g(x) + f (x)

Lera25 [3.4K]

Answer:

free points thanks

Step-by-step explanation:

7 0

3 years ago

If <img src="https://tex.z-dn.net/?f=x-12%5Csqrt%7Bx%7D%20%2B36%3D0" id="TexFormula1" title="x-12\sqrt{x} +36=0" alt="x-12\sqrt{

Elis [28]

Answer:

x = 36

Step-by-step explanation:

$x - 12\sqrt{x} + 36 = 0$

Subtract x and 36 from both sides.

$-12\sqrt{x} = -x - 36$

Divide both sides by -1.

$12\sqrt{x} = x + 36$

Square both sides.

$144x = x^2 + 72x + 1296$

Subtract 144x from both sides.

$0 = x^2 - 72x + 1296$

Factor the right side.

$0 = (x - 36)^2$

$x - 36 = 0$

$x = 36$

Since the solution of the equation involved squaring both sides, we musty check the answer for possible extraneous solutions.

Check x = 36:

$x - 12\sqrt{x} + 36 = 0$

$36 - 12\sqrt{36} + 36 = 0$

$36 - 12\times 6 + 36 = 0$

$36 - 72 + 36 = 0$

$0 = 0$

Since 0 = 0 is a true statement, the solution x = 36 is a valid solution.

6 0

4 years ago

Solve for x.<br> 6x - 3x = 12

expeople1 [14]

Answer:

x=4

Step-by-step explanation:

3x = 12

divide by 3

x =12/3

8 0

3 years ago