Mathematics: Solve by elimination x+7y=17 x-y=-7

a. Trueb. Truec. Falsed. True...

Solve by elimination x+7y=17 x-y=-7 - id717714315295, unknown1246

niasheffield65

12.09.2021

your question:

solve by elimination x+7y=17 x-y=-7

x+7y=17

x-y=-7

change signs on bottom equation

x+7y=17

-x+ y= +7

8y = 24

---.

8. 8

y= 3

plug y into one of the original equations

x -3 = -7

+3. +3

x=-4

(-4,3)

hope this helps! have a great day! :)

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violetmeadow4

14.03.2022

a. True

$\frac{1}{2} (c + 8) \: and \: \frac{c + 8}{2} \\ are \: equivalent \: expression$

b. True

$\frac{1}{2} (c + 8) \: and \: \frac{1}{2} c + 4 \\ are \: equivalent \: expression$

c. False

$The \: only \: terms \: in \: \frac{1}{2} (c + 8) \: are \: \frac{c}{2} \: and \: 4, \\ not \: c \: and \: 8$

d. True

$You \: can \: multiply \: c \: and \: 8 \: by \\ \frac{1}{2} \: in \: \frac{1}{2} (c + 8) \: to \: find \: an \\ equivalent \: expression$

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