Your cousin gave you $2.98 which to buy a present this covered 2/7 of the cost how much did the present cost

What is the value of x in the diagram below?

If you flip a coin 3 times, what is the probability of flipping heads 3 times? a. p(3 heads) = 3/8 b. p(3 heads) = 1/6 c. p(3 heads) = 1/8 d. p(3 heads) = 1/2

Percent increase and decrease. original number: 45 new number: 18