Brianna is twice as old as James. David is four times as old as James. Brianna is 20 years younger than David. How old is David?

Which of the following statements is true? A reference angle may be obtuse. A reference angle is always acute. A reference angle is between 0 and 180 degrees. A reference angle can be negative.

Perfume is sold in two different sizes of bottle. The 80ml bottle is priced at £55. The 50ml bottle is usually priced at £45, but is on special offer. If you buy one 50ml bottle of perfume you can get a second for half price.

How do I make this into an algebraic equation for the following word problem? Michael received $300 for his birthday this year. This was $40 less than half the amount he received last year. how much did Michael receive for his birthday last year?

One inch is equivalent to 2.54 centimeters. how many inches are in 50.8 cenemeters

The water level in a pond decreased from 12 feet deep to 9 feet deep. What is the percent decrease in the water level?

What is the difference of (4-5y) - 2 (3.5y-8) ?

What is 12 + 5x = - 6x + 23?

A color printer prints 7 pages in 3 minutes. How many minutes does it take per page? It takes 30 pounds of seed to completely plant a 5 acre field. How many pounds of seed are needed per acre?

Log (a^2/b^8 square root c)

Myra's stamp collection consisted of 120 stamps in October. By the following March, her collection had grown to 138 stamps. By how much did her collection increase between October and March? 18% 15% 12% 9%