Zeke is saving for a dirt bike that costs $576. He saves $24 each week. He uses the estimate 600÷20=30 to determine how many weeks he will need to save until he has enough money. i need hep asap

Math each whole number with a rational,exponential expression

Which equation represents a direct linear variationa. y=x2b. y=2/5xc. y=1/xd. y=x+3

The discrete random variables x and y take integer values with joint probability distribution given by f (x,y) = a(y−x+1) 0 ≤ x ≤ y ≤ 2 or =0 otherwise, where a is a constant. 1 tabulate the distribution and show that a = 0.1.2 find the marginal distributions of x and y. 3 calculate cov(x,y).4 state, giving a reason, whether x and y are independent. 5 calculate e(y|x = 1).