Question

Helppppp on alllll plz

Answer 1

a. $150

b. 150+20x$\geq$630

20x$\geq$480

x$\geq$24

c. 150+20x$\geq$750

20x$\geq$600

x$\geq$30

d. 150+20x$\leq$950

20x$\leq$800

x$\leq$40

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