You have 26 library books. You return some books. Then you take out 15 more books. Now you have 27 books. How many books did you return? Solve any way you choose. Show your work.

What is the decimal for 9/10

Anne and maria play tennis almost every weekend so far anne has won 12 out of 20 matches how many matches will anne have to win in a row to improve their winning percentage to 75%

How do you solve 11 - 4x - 3jx = w

12 ten thousands 8 thousands 14 hundreds 7 ones in standard form

A culture started with 6,000 bacteria. After 4 hours, it grew to 6,600 bacteria. Predict how many bacteria will be present after 10 hours. round your answer to the nearest whole number.

The test scores of 40 students are listed below. Find P85. 30 35 43 44 47 48 54 55 56 57 59 62 63 65 66 68 69 69 71 72 72 73 74 76 77 77 78 79 80 81 81 82 83 85 89 92 93 94 97 98 89 87 85 34

How many arrangements of the letters in peppermill are there with?

Y = - 4x + 2 y = x - 3

What is the factored form of the polynomial? x2 + 9x + 20 (x - 4) (x - 5) (x - 2) (x - 10) (x + 4) (x + 5) (x + 2) (x + 10)

290 pennies are equal to how many dimes