An employee's salary went up from $10 per hour to $12 per hour. What is the rate of increase?

Find the circumference of a circle with a diameter of 15 inches. Round to the nearest tenth and include units in your answer.

1. Gentry and Kennedy each bought 6 pencils from the school store. What was the total number of pencils that the frends purchased?

Simplify algebraic expression 1/2 (16a-20b)

Even though the population standard deviation is unknown, an investigator uses z rather than the more appropriate t to test a hypothesis at the. 05 level of significance. (a) Is the true level of significance larger or smaller than.

The second of two numbers is 6 times the first. their sum is 84. find the numbers

Ann purchased a prepaid phone card for $25. Long distance calls cost 19 cents a minute using this card. Ann used her card only once to make a long distance call. If the remaining credit on her card is $21.77, how many minutes did her call last?

Differentiate y=x/5-5/x

Which proportion could be used to determine if the figures represent a dilation? 2/3=5/8, 2/3=8/5, 2/8=5/3, or 2/8=3/5?

The density of brass is about 8.5 g/mL. How much mass would an object, that is made of brass and is 2 mL have? How about an object that is made of brass, but has a volume of 0.5 mL?

Factor 15x3 - 5x2 + 6x - 2 by grouping. What is the resulting expression? (5x2 + 2) (3x - 1) (5x2 - 2) (3x + 1) 1 (15x2 + 2) (x - 1) (15x2 - 2) (x + 1)