15n-19n when simplifying

It takes for three gardeners 90 minutes to weed a garden. If the job is to be done in only 15 minutes, how many more gardeners need to be put on the jobs?

Evaluate (1.2x 10 4) + (3.2x 10 - 6) using a graphing calculator (You can also use your virtual TI calculator if you have it or find one online). Write your answer in scientific notation from a calculator.

Craig made some cookies. He used 1/2 cup of sugar and 1/4 cup of flour. How many cups of dry ingredients did Craig use? A.) 3/8cups B.) 1/4cups C.) 1/3 cups D.) 3/4

What is the slope of the line containing (6, - 7) and (5, - 9) ?

a standard size golf ball has a diameter of 1.680 inches. The material used to make the golf balls weighs 0.6523 ounces per cubic inch. What is the weight, to the nearest hundredth of an ounce of one golf ball

What is equivalent to 4b? A) b+2 (b+2b) B) 3b+b C) 2 (2b)

Find the value of x 58° 42°

If tan x° = z divided by 10 and cos x° = 10 divided by y, what is the value of sin x°?

Which model is most appropriate for each set. (-3,-1), (-1,1) (0,2) (1,3)

Rami is solving the equation for x. - 6x - 1 = 5 - 6x - 1 1 = (5 1) - 6x = 6 - 6x - 6 = 6 - 6 x = - 1 Which operation symbols should Rami write in the and the?