Find the sum of 7a 3 14a 12 and - 6a 3 12a 2 - 7.

Manuel wanted to put a brick walkway through his backyard from the door to the barbeque area. The walkway is going to be 6 yards long when he is finished. So far he has completed 61 inches of the walkway.

Xavier and Bobby each receive a salary check every week. They combine their checks in one account. Their account has $100 after 2 weeks and $300 after 6 weeks.

Mary is x years old. How old will she be in 11 years? How old was she 5 years ago?

Alisa had some juice in a bottle. Then she drank 3/8 liter of juice. If this was 3/4 of the juice that was originally in the bottle, how much juice was there to start?

What is the y-intercept for the equation - 2x + 5y = - 10?

Marketing estimates that a new instrument for the analysis of soil samples will be very successful, moderately successful, or unsuccessful, with probabilities 0.3, 0.3, and 0.4, respectively.

Find the roots of the following equations. a) 4x+9=34 b) (x-4) (x+2) = 0 c) 2x^2-6x+4=0

6 · 14 - (9 + 8) 2 =

Skylar drove 280 miles in 5 hours. If she continued at the same rate, how far would she travel in 20 hours?

Simplify the following expression. (9x + 2) + 5x