Answer:
the answer is B (2,1)
Step-by-step explanation:
Given the simultaneous equation

Using substitution method
from equation 2 :

Substitute equation 3 into 1:

Open the bracket

Substitute y=1 into x=3-y

Hence the solution to the equation is (2,1)
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Answer:
h=-3
Step-by-step explanation:
Combine like terms ( -2.5h )
1.8=-2.5h-5.7
Add 5.7 to 1.8 ( 7.5 )
Bring down -2.5h
the divide ( 7.5/-2.5 )
h= -3
Answer:
Area = 50.24 feet^2
Step-by-step explanation:
radius = 4 feet
Area =?

Substitute values into the given equation

Your answers are Equation A (8(4+x) = 72, and Answer C (5 hours).
1) Figure out how much of the total money she earned on Friday. 4*8= 32
2) She has 72 dollars total and 32 dollars were earned on Friday, meaning the rest was earned on Saturday. 72-32= 40
3) She earned 40 dollars on Saturday for 8 dollars an hour, so now you divide 40 by 8 and you get 5. She worked 5 hours on Saturday.