Evaluate the expression when a = - 7 and y = 7

-a+9y

Annie agreed to wash the car each week if she could get paid $.01 the first week, $.02 the second week, $.04 the third week, $.08 the fourth week, and so on for 15 weeks. How much money will she be paid on the 15th week?

Write an equation in general form of the line passing through (3, - 5) whose slope is the negative reciprocal of - 1/4

Each week samantha can pay as much as $15 for her school lunch. write an inequality showing how much Samantha spends on lunch.

Read the real-world problem. Jonah wants to buy two copies of a book. Which algebraic expression could Jonah use to find the value of the items? A. 2b B. b • b C. b + d D.

If f (x) = 3x^2-4x-5, find (f (x+h) - f (x)) / h

Sum of 7x times 7 + 3x+1 and - 4x times 4-x+3

2. If y (x-1) = z then x=

John (whose line of sight is g ft above horizontal) is trying to estimate the height of a tall oak tree. He first measures the angle of elevation from where he is standing as 30 degrees.

Question: Carbon-11 has a half-life of about 20 minutes. If we start with 200 grams, how much will be left after 3 hours? A. 25 grams B. 2.5 grams C. 0.39 grams D. 0.039 grams

Emily used the number sentence 736.82 + 146.89 = to solve this story problem. A small bin held 146.89 pounds of almonds. A large bin held 736.82 pounds of peanuts.