When I was four my sister was half my age. I am now 70 how old is my sister?

A DJ tracks the song requests she receives on a Friday night. She noted that the number of requests for country songs was 2 more than 4/3 times the number of requests for hip-hop songs. There were 18 requests for country.

The amount of sports drink in a cooler during practice is modeled by the equation y = 648 - 24x, where y is the number of ounces in the cooler after practice and x is the number of players at practice who take drinks from the cooler.

I don't know how to explain this, in place value does the number 44,910 have a value 10 times the value of another digit? How do I explain the answer?

There are three floors in a given building such that floors 2 is above floors 1 and floors 3 is above floors 2. in the building there are two flats in each floors such Flat M is in the west of Flat N.

4m + 2 (m + 1) = 9m + 5 Solve and Show work so I can understand.

What is the multiplicative inverse, or reciprocal, of 5/9?

Estimate each product. 28.21 x 8.02

What is the factored form of m2 + - 27n2

The bill for a pizza was 14.50. Charles paid for 3/5 of the bill. Show two ways to find how much he paid

it is 1.6 km from Debra's house to the nearest mailbox how far is it in meters be sure to include the correct unit in your answer