−
50
54

−
100
40

+1.65=minus, start fraction, 54, divided by, 50, end fraction, minus, start fraction, 40, divided by, 100, end fraction, plus, 1, point, 65, equals

X= 2 he can buy 2 packs of cards for $12 and an action figure for $3 so he would spend $15 in total plus the free poster

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.