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3 years ago

7

Rewrite each expression below using the distributive property then evaluate each expression for X equals two and Y equals five.

a.8x-4= b.6y2+24y c. 7X(y -2) d. 3(9+y)

1 answer:

Anit [1.1K]3 years ago

4 0

A)8*2-4 b)6*5+2+24*5 c)7*2(5-2) d)3(9+5)
12 30+2+120 14*3 3*14
152 42 42
i hope it helps

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Solve the system of equations.<br> 2y+7x=−5<br> 5y−7x=12<br>

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We can solve this by substitution method.

Look at the second equation. If we rearrange to find 7x, we can substitute in the value into the first equation.

$5y-7x=12$

$5y-7x-12=0$

$5y-12=7x$

Therefore, $7x=5y-12$

Now replace the 7x in the first equation with 5y - 12:

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$2y+(5y-12)=-5$

$7y-12=-5$

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Now that we know y, we can find x by substituting in y = 1 into any equation we want. I will use the equation: 7x = 5y - 12

$7x=5y-12$ (substitute in y = 1)

$7x=5(1) -12$

$5x=5-12$

$7x=-7$

$x=-1$

__________________________________________________________

<u>Answer:</u>

<u></u> $y=1\\x=-1$ <u></u>

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