90 girls and boys have planned for an educational tour. they are in a ratio of 3 girls to 6 boys. how many girls are there

72 x 10^-4 turn it into scientific notation

One - fourth of c is added to the product of 9 and r

Triangle RST is translated 2 units left and then reflected over the y-axis.

Simplify the following expression: (67 - 18) : 7 * 3

Henry had charges 933 dollars to his credit card. Even after the cost of his net purchase, he was still under his credit limit of 1500 dollars. Write a mathematical sentence that expresses the information

Penny currently has $180 dollars and is spending $6 per day. Nick has no money but is earning $8 each day. After how many days will they have the same amount of money

Katie recently retired and met with her financial planner. She arranged to recieve 57000 the first year. Because of inflation, each year she will get 820, ore than she recieved the previous year.

4 to the 0.5 a-2 b1/2 c2

Looking at y = mx + b when b is 0

Expand and simplify (5r-6s+s2) (13r+3s-5s2)