Solve the system of equations using the substitution method.

y = - 6x

-8x - 7y = 0

(x, y) = (,)

Darryl is a plumber. He charges $35 to make a service call and $20 an hour for any repairing. Write an algebraic equation relating Darryl's charge to the total number of hours of labor required.

In two or more complete sentences, describe a real world situation that can be modeled by the inequality and solve the inequality. x + 11 ≥ 23

The ratio of teachers to students at a school is 3:74 there are 2500 students at the school about hiw many teachers are at the school

You have a piggy bank containing a total of 119 coins in dimes and quarters. If the piggy bank contains $20.75, how many dimes are there in the piggy bank

How many radii does a circle have I am pretty sure its two, but i am not 100% certain

What the sum of the first seven terms 4,12,36,108

A savings account with $500 now has $120.

Bradley made a house for his dog, Bowser, out of wood with a cube base and a triangular prism top. The dimensions of the dog house are a = 5 feet, b = 1 foot, and c = 2.7 feet. Note: Figure is not drawn to scale.

8x=24 is 8x=24:4 the same

The population of bacteria in a petri dish doubles every 24 h. The population of the bacteria is initially 500 organisms. How long will it take for the population of the bacteria to reach 800? Round your answer to the nearest tenth of an hour.