Answer:
±35
Step-by-step explanation:
sqrt(49*25)=sqrt(49)*sqrt(25)=±7*±5=±35
20x + 5y = 1900
x + y = 155....multiply by -20
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20x + 5y = 1900
-20x - 20y = - 3100 (result of multiplying by -20)
--------------add
-15y = -1200
y = -1200/-15
y = 80 <== 80 per hr for the mechanic that worked 5 hrs
x + y = 155
x + 80 = 155
x = 155 - 80
x = 75 <== 75 per hr for the mechanic that worked 20 hrs
The slope is 1/3 (m=1/3)
Y=1/3x+7
Answer:
the first one i think
Step-by-step explanation:
i can't see the pic clearly make it better, and i will solve for u