What is the mean for this list of numbers? 17, 19, 21, 23

Dan says 3/5 is the same as 3.5 is he correct?

Valerie is a big fan of country-western music and buys one CD every week. With tax, each CD costs her about $9. She also attends two concerts each year. the admission charge for each concert amounting to $40.

A new uniform costs $49.99. If it is on sale for 15% off, what is the cost before tax?

Darryl is three inches taller than Reggie. Their heights, combined is 138 inches. How tall is Reggie?

What is the function f (x) = 3 (x^2-8x) + 10 written in vertex form

If the rate of inflation is 3.9% per year, the future price p (t) (in dollars) of a certain item can be modeled by the following exponential function, where t is the number of years from today. p (t) = 400 (1.039^t).

The number of measles cases has increased by 8.3% since 2000. Express your answer rounded correctly to the nearest hundredth. Stated another way, the number of measles cases is times what it was in 2000.

f (x) = |x|+1 transform f by shifting it left 5 units and up 8 units, and write the new function equarion.

What is the percent change from 70 to 56

Which rational number is equivalent to 3.27 repeating? A. 327/990 B. 27/99 C. 47/11 D. 3 27/10 E. 3 27/100