Simplify expression 2 (n^2+n) - 5 (n^2-4n)

Jordan places two boards end to end to make one shelf. The first board is 47-100 meter long. The second board is 5-10 meter long. What fraction is equivalent to 5-10 and has a denominator of 100.

What is equivalent to 6/9

Can someone explain Scientific Notation

Ann bought 6 CDs that were each the same price. Including sales tax, she paid a total of 93.60. Of that total, 4.20was tax. What was the price of each CD before tax?

7 less than three fifths of b is a

Two more than three times a number is six less than the product of two and a number.

Which statements are true about the experimental and theoretical probability of this trial? Jacob's Coin Flips. Heads occurs 68 times and tails occurs 32 times.

Petes dog weighed 30 pounds. It then lost 16% of it weight. How long did pete's dog loose?

In the following line of letters, what letter follows the seventh E? B E F B E B I E F S E E D P F E S J E E J D E D E P J E T

Two different families bought general admission tickets for a reno aces baseball game. One family paid $45 for 5 adults and 2 children. The other family paid $39 for 2 adults and 5 children. Write a system to represent the problem and solve