Prove that the sum of two rational numbers is a rational number.

Diana invested $3000 in a savings account for 3 years. She earned $450 in interest over that time period. What interest rate did she earn? Use the formula I=Prt to find your answer, where I is interest, P is principal, r is rate and t is time.

Lucia knows the fourth term in a sequence is 55 and the ninth term in the same sequence is 90. Explain how she can find the common difference for the sequence. then use the common difference to find the second term of the sequence.

What is the first 6 square numbers

Henry knows that the circumference of a circle is 18 pi inches. What is the area of the circle?

How do i solve for this? I forgot

Solve for x. 5 (x+1) ≤ 5x+3

Nikki drank 0.8 of a 20.5 ounce container of apple cider. How many ounces of apple cider did Nikki drink?

What is 12 units to right of 0

Distance between (-5,-3) and (1,2)

Alana bought 6 books each book costs 13$ and each bookmark cost 2$ how much did she spend on books