Simplify each expression. (fractions)

a) - 4/5+3/10

b) 2 5/8-1 1/3

The average yearly rainfall in the sahara desert used to be 10 inches. a climatologist believes that amount has changed. which represent the null and alternative hypothesis?

bob needs to be at school by 7:00 it takes him 1 hour and 21 minutes to get there. his morning routine takes 30 minutes. what time should bob leave the house

The formula for final velocity of an object starting from zero and undergoing constant acceleration is v=1/2 at^2. What is the rate of an acceleration if the car has a final velocity of 50 m/s after 5 seconds?

Find the domain of the parent function below y = x^2 A. All real numbers B. All positive numbers C. All negative numbers D. All real numbers except 0

A card is randomly selected from the standard deck. What is the probability of selecting a red card, the king of spades, or the ace of clubs? A: 1/2 B: 7/13 C: 27/52 D: 15/52

Let S = {M, A, T, H,}. List all the ways that you can select two members of S with repetition allowed. The order in which you select the members is not important.

The lines below are parallel. If the slope of the solid line is - 3, what is the slope of the dashed line?

What's 45,089 in word form?

Write 6:15 in ratio form

What is 17% of 50 as a percentage