Solve the system by substitution.

-x-y-z=-8

-4x+4y+5z=7

2x+2z=4

Mary paid $12 plus $0.50 per ride at the local fair. Jeffrey paid $2 per ride at the fair. They spent an equal amount. A. - 12=0.5x+2x B. 12-0.5x=2x C. 12+0.5x=2x D. - 12-0.5=-2x

10) Mr. Parker wants to draw a floor plan of his office, which measures 15 feet wide by 17.5 feet long. He is using the scale 1 2 inch = 3 feet to draw his floor plan. What will be the width of his office on the floor plan?

There are 95 white pieces of paper in a hat along with 5 blue pieces of paper. What is the theoretical probability that a blind-folded person draws a blue piece of paper on the first attempt? * 1.) 5 out of 100, which is 5/100 or 1/20 (5%) 2.

a boy is older than his sister by 3 years five years ago, the ratio of their ages was 4 : 3 find his present.

What is the degree of 5x^2y^3+2x^2

What number is 10 more than 237

Raul measures the length of a hallway upstairs as 8 feet. his brother measures the length of a hallway downstairs as 96 inches. which hallway is longer

A rectangular parking lot is enclosed by 400 feet of fencing. The longer sides are three times as long as the shorter sides. What is the area of the lot?

a payday loan store charges $40 for one month loan of $300. what annual interest rate is This equivalent to

The low temperatures for the week in Carrollton, in degrees Fahrenheit (°F), were 17, 41, 11, 14, 11, 13, and 15. What is the mean of the temperatures without the outlier?