Answer:
x=<u>-2y+70</u>
5
y=<u>-5x+70 </u>
2
Step-by-step explanation:
<span>B. The sample might not be representative of the population because it only includes students who are attending an after-school activity.</span>
Answer:
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Step-by-step explanation:
-2x-10=8
-2x=8+10
X= -18/2
hence X= -9
12a)
5x + 45 + 3x - 25 = 180
8x + 20 = 180
8x = 160
x = 20
12b)
2x - 5 = 2(20) - 5 = 40 - 5 = 35
3x - 25 = 3(20) - 25 = 60 - 25 = 35
y = 180 - (35+35)
y = 180 - 70
y = 110
