On Roberto's shelf are: • 6 mystery books • 5 science books • 4 history books • 3 adventure books Roberto will randomly choose 1 book to read. What is the probability that he will choose an adventure book?

Simplify 9r-2s-4r-3s

Domain and range of y=2x+1

Dave Bowers collects U. S. gold coins. He has a collection of 53 coins. Some are $10 coons, and the rest are $20 coins. If the face value of coins is $750, how many of each denomination does he have

5) Consider the sequence of steps to solve the equation: 2 (x - 4) + 5x = 9x - 10 Given ⇒ 2 (x - 4) + 6x = 9x - 10 Step 1 ⇒ 2x - 8 + 6x = 9x - 10 Step 2 ⇒ 2x + 6x - 8 = 9x - 10 Step 3 ⇒ 8x - 8 = 9x - 10 Step 4 ⇒ 8x - 8x - 8 =

Factor 28y + 36. Write your answer as a product with a whole number greater than 1.

In a figure there are two adjacent triangles, KJL and LJM. KJL = (3x + 11) degrees. LJM = (5x + 3) degrees. Angle KJH = 32 degrees. What is the value of X? What is the angle of KJM?

What is 4 1/2 - 3 5/12 in a mixed number in lowest terms?

Find the greatest common factor of 5 and 10

Hans needs to make a total of 80 deliveries this week. So far he has completed 32 of them. What percentage of his total deliveries has Hans completed?

Phillip saves $8.00 a month. how long would it take him to save at least $60.