Siti, rina and liza are 3x+-1 and 20 years respectively. write an algebraic expression for the total age of the three girls

step-by-step explanation:

3x +-1=20

3x=20+1

3x=21

x=21/3

x=7

siti is=3*7=21

rina is=-1*7=7

liza is =20*7=9

(2,20) means that the 2 is 2 hours and 20 is 20$. so there both 20$ for 2 hours only the same price. like it says. so, the dunk tank and the bounce house are the same price (20$) for the same amount of time (2 hours).

hope i

step-by-step explanation:

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