What dose it mean to group in math

Kathi starts with a number. She adds 3 to her number, then doubles the result. Finnaly, she subtracts 7. If she ended with 9, what number did she start with

If both dimensions in a parallelogram are doubled then which statements about its area will be true 1. The ratio of the new area to the old area will be 2:1. 2. The ratio of the new area to the old area will be 1:4 3.

If a figure is a square then it is a regular quadrilateral is this true or false explain

A triangle has a height that the length of its base. If the length of its base is 24 cm, what is its area?

What number is 50% of 40

The population of a town is divided into three age categories. A random sample of each category is surveyed about voting choices. This type of sampling is called cluster sampling. stratified sampling. simple random sampling.

Tommy had 3 packs of bubble gum. Each pack has 5 pieces in it. How many peices of bubble gum does Tommy have a total of?

Is 1/2 equivalent to 5/8

0.59+0.33t=3.68t-0.75

The area of a parallelogram with a side of 5.6 in is equal to the area of a rectangle with sides 7 in and 8 in. Find the altitude to the given side in the parallelogram