Why is it necessary to check solutions to equations contating rational expressions?

A cable installer charges $30.00 per hour plus a $50.00 service charge. Your father's firm hires him to hook up his company's Internet service. Find the total charges if it takes the cable installer 8.5 hours to complete the task ...?

The perimeter of a rectangle is 50 centimeters. the length of the rectangle is one more than 3 times the width of the rectangle. what are the dimensions of the rectangle

Jon ran a track that qas 1/8 of a mile long. he ran around the track 24 times. how many miles did jon run?

How to represent and solve equations with variables on both sides

What is the lowest terms for 2 : 2⅓?

Mr. Jack have $128. The man give $22 back. Mr. Jack now have $106. How many the man have now?

you purchased six baseball caps for the following amounts : $19.99, $4.99, $14.99, $29.99, $24.99 and $49.99, respectively. what was the average amount you paid for the six caps

Choose the correct graph of the equation. y - 3 = - (x + 5)

Simplify the expression: 52 - [30 - 2 (7 - x) ].

sally finds a sweater on sale for 20% off the original price 50$. She has a coupon for an additional 25% off the sales price. What I the final of the sweater, before tax?