Answer:
m=mary age
j=joe age
m=2j-10
m-j=30
rewrite
m=j+30
so that means that
2j-10=j+30
-j
j-10=30
+10
j=40 so lets plug this in
m=2(40)-10
m=70
Hope This Helps!!!
its 5
Step-by-step explanation:
cause 2 divided by 30is 15 minus 10 its 5
the answer should be 7a^3-4a^2-2a-87
141 cookies
amount of cookies
= 9(15) + 6
= 135 + 6
= 141
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