You spend $40 on 5 pounds of concrete what is the unit rate in dollars per pound?​

How do you create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1?

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

80 points suppose marcy made 45 posts online. if 23 of them contained an image, what percent of her posts had images? round your answer to the nearest whole percent. 54 percent 51 percent 49 percent 48 percent