What are the steps to this fraction problem? 3/5 + 1/5=

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

The function show two sisters' savings account and the rate at which they plan to deposit money

F. a fair coin is thrown in the air four times. if the coin lands with the head up on the first three tosses, what is the probability that the coin will land with the head up on the fourth toss? a. 0 b. 1/16 c. 1/8 d. 1/2