A city has 4 new houses for every 9 old houses. If there are 20 new houses in the city, how many old houses are there?

A. 43

B. 49

C. 45

D. 47

Which statement explains why 49 is a perfect square? 49 can be multiplied by 49. 49 is equal to 7 plus 7. 49 is between 36 and 64. 49 is equal to 7 times 7.

How can I find the area of a rectangle with a rectangle the size of w - 2in and l - 5 in. I need two ways and i need a lot of easy explaining because I need to draw how I did it.

If x times 9=145 what is x does this sound write

Tamara finds the sum of two number cubes rolled at the same time. The chart below shows all possible sums from the 36 possible combinations when rolling two number cubes.

Use the reverse tabular method to solve division problem: (x^3-8) / (x-2)

The system of equations x = y - 1 y + 4 = x + 6 has how many solutions.

Solve this inequality: 3 (x + 6) - 2 (x + 2) > (or equal to) 10

Is 4/5 greater than 1/3

Martha always tries to exercise at least 30 minutes a day. Write an inequality to represent the number of minutes Martha exercises each day.

A swimming pool has perimeter of 72 feet. The short sides measure 16 feet. What is the length of the longer sides of the pool