Which of these have one solution?

A. - 21 - 8a = - 1 + 6 (4 - 5a)

B. 33 + 6x = 3 (-1 + 5x)

C. 4 (m - 1) + 5 = - (1 - 4m)

D. None

Wes bought some school supplies at an outlet store in Maine, a state that has a 6.5% sales tax. Including the sales tax, how much did Wes pay for two blazers priced at $49.95 each and 3 pairs of pants priced at $17.50 each?

Karyn proofreads 15 pages in 2 for $40 how much does she revive on average for a page

When you purchased 100 shares of Bio-Tech Sciences, the value per share was listed at $12.38. When Bio-Tech Sciences sent out their daily report today, you see that they list the value of their stock at $45.16.

John has $70. His restaurant bill comes to $58. He wants to leave a 20% tip. Will he have enough to pay the bill with that amount of tip?

What is the independent variable of f (q) = q - 7?

Which is used to find the number of ways a given number of objects can be ordered?

Given a right triangle with legs of 3 cm and 12 cm, which triangle is similar? A) A right triangle with legs of 6 cm and 18 cm A right triangle with legs of 9 cm and 18 cm A right triangle with legs of 6 cm and 24 cm A right triangle with legs of 8

What is the minimum or maximum value if the function X^2 + 30x + 21

21X+7Y = 42 - 5X+5Y=10

Tom wants new carpeting for his bedroom. His room is a 9 metres by 7 metres rectangle. How much carpeting does he need to buy to cover his entire bedroom floor