Andy has won 12 out of the last 24 tennis matches he has played. if he wants to improve his win record to 70%, which equation could he use to determine how many matches he would have to win in a row? a) 12 + x 24 + x = 0.70 b) 24 + x 12 + x = 0.70 c) 0.70 24 + x = 12 + x d) 0.70 12 + x = 24 + x

Answer is A

12+x

. =0.70

24+x

blue marble is 15 times out of 50 = 15/50 reduces to 3/10

landing on tails is 24 out of 50 = 24/50 reduces to 12/25

to find the probability of both multiply together:

3/10 x 12/25 = 3 x 12 / 10 x 25 = 36/250

if you multiplied the numerator and denominator by 10 you get 360/2500.

the answer is 360/2500

answer: 7270

step-by-step explanation: