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2 years ago

13

20x+5y=-15 solve for y

2 answers:

mixer [17]2 years ago

8 0

20x+5y = -15
Take the 20x to the other side to get.
5y = -20x -15
Then divide both sides by 5.
So y = -4x -3

I know someone else has answered with something else, but this is how I'd do it ;)

lilavasa [31]2 years ago

7 0

Okay, so we have 20x+5y=-15.

To find y, let's plug in 0 for x, that way we have 20(0)+5y=-15.

Now do 20(0) and we have the equation: 5y=-15

divide both sides by 5 and we get y=-3!

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<img src="https://tex.z-dn.net/?f=%20%7B2%7D%5E%7Bm%7D%20%20%3D%20n%20" id="TexFormula1" title=" {2}^{m} = n " alt=" {2}^{m} =

sveta [45]

Answer:

$\displaystyle n^3-\frac{1}{n^{2}}$

Step-by-step explanation:

<u>Exponents Properties</u>

We need to recall the following properties of exponents:

$(a^x)^y=(a^y)^x=a^{xy}$

$\displaystyle a^{-x}=\frac{1}{a^x}$

We are given the expression:

$2^m=n$

We need to express the following expression in terms of n.

$8^m-4^{-m}$

It's necessary to modify the expression to use the given equivalence.

Recall $8=2^3 \text{ and }4 = 2^2$ . Thus:

$(2^3)^m-(2^2)^{-m}$

Applying the property:

$(2^m)^3-(2^m)^{-2}$

Substituting the given expression:

$n^3-n^{-2}$

Or, equivalently:

$\mathbf{\displaystyle 8^m-4^{-m}= n^3-\frac{1}{n^{2}}}$

5 0

2 years ago

Raphael counted a total of 40 white cars and yellow cars. There are 9 times as many white cards as yellow cars. How many white c

Leona [35]

That is simple all you have to do is multiply the number of white cars by 9 and you will get your answer. 40*9=360

6 0

2 years ago

What number is bigger 10.65 or 1.056

Vladimir [108]

10.65 is bigger because 65 is larger than 56

5 0

3 years ago

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steposvetlana [31]

I hope this helps you

8m+7m+4n-2n

15m+2n

4 0

2 years ago

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If 1 mile is approximately 1610 meters, which is closest to the number of miles in 10,000

Aleonysh [2.5K]

Answer:

10,000 Miles is 16,100,000 meters. Hope I helped!

Step-by-step explanation:

1610 x 10,000 =

16,100,000

8 0

3 years ago

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