How do you Simplify this expression in algebra?

9x + 2x (5 + 4) - 2 (5x + 4x)

Solve for x x2+4x-21=0

Suzi began fishing at 10:50 A. M and fished until 11:30 James finished fishing at 11:45 A. M. He fished for the same length of time as Suzi. At what time James start fishing?

Julie was dividing 13.8 by 0.1. which statement about the quotient is true A:it will be greater than 13.8. B; it will be lest than 13.8. or C; it will be equal to 13.8.

If you saved 2.00 on january 1, 4.00 on february 1, 6.00 on march 1 and so on how much money would you save in a year

Find the derivative of the function by using the product rule. Simplify your answer.

64x = 8 What is value of x that makes the equation true?

Which equations are aquivan to 3/4 + - 7/4 check all that apply

Battery was charged. when the charging began it was 23% full after 30 minutes of charging the battery was 89% full. how fast was the battery charged? How long did it take the battery to be funny charged?

93*10 of 6th power whole number

1) What is 61% of 7.2?