2x+y=8 and y=x-7 solving systems by substitution

Find the diameter of a circle with an area of 415.48 square inches

Martin was going to the market to buy apples. The price for apples is $3.50 times the number of apples bought plus one-dollar tax. Write a polynomial function A that represents the price of apples in terms of n. If Martin bought 3^3 amount of apples.

Ten coins weigh 25 grams. How many grams does 1 coin weigh?

Evaluate the expression w 2 - v + 1 for w = - 2 and v = - 8.

Find the volume of a cube that has a side length of 6a^2b A. 216a^2b B. 18a^6b^3 C. 216a^6b^3 D. 18a^2b

6 yards to 36 yards. Find the percent of change. Round to the nearest tenth of a percent if necessary.

Mark, evan, and cayla are playing a game. there are 3 blue marbles, 2 red, and 1 green marble. if mark pulls a blue marble he gets $1. if evan pulls a red marble, he gets a $2. if cayla pulls a green marble, she gets $3.

How do you reduce 12/30 by 1/2

Maria's age of 17 years less than Orlando's age. The sum of their ages is 33 find their ages.

John had $21 to spend on 2 notebooks. After buying them he had $13. How much did each notebook cost?