Math Test form Assignment

Solve for x.5x+10=7x-40.

x=15
x=5
x=10

Solve for s.4.5s+2.23=10

s=5.77
s=1.3
s=4.5

Solve for x.3.4x-1.02=0.23

x=0.37
x=1.02

Mary has 3 apples, she throws two of them at Frederick' s head, how much money will frederick sue her for? Will Mary still eat the apples?

End of Test