itsmaddierae1 itsmaddierae1

11-09-2017
Mathematics

contestada

Can someone help me on 17 and 18?? I really need the help!!!

Can someone help me on 17 and 18 I really need the help class=

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kphung76127 kphung76127

11-09-2017

Remember that in these diagrams, adjacent angles form a straight angle, which adds to 180 degrees. Also, vertical angles are always the same measure.

17.
11x+16+8x+12=180
19x+28=180
19x=152
x=8

3y+13+5y-1=180
8y+12=180
8y=168
y=21

18.
3x+17=5x-47
3x+64=5x
64=2x
32=x

2y+9=3y-20
9=y-20
29=y

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