It would be 7 with 75 over 100....it would look like 7 75/100. then simplify it.
Part A.
y=4x+3
Part B.
11=4x+3
8=4x
2=x
2 dollars
Part C.
4(3)+4(2)=12+8=20
It would be enough if there is no sales tax.
Hope this helps!
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Equation:
Time*speed= distance
1.7(time)*22.4(speed)=38.08meter(distance)