If the diameter of a circle is doubled its area will be multiplied by ?
these are the answers
a. 1/2
b. 1/4
c. 2
d.4
e.16

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

Suppose you are an avid reader and are looking to save money on the cost of books instead of paying about $20 for each book, you decide to look into purchasing a kindle for $120 you can purchase e-books for about $5 each 1. find the slope-intercept equation for the cost of the hard copy of books using x to represent the number of books 2. find the slope-intercept equation for the cost of the kindle with cost of e-books using x to represent the number of books

Express -5 2/5 as an improper fraction.