Which property is this?

9a + (-9a) = 0

X-5=5x-13 i need the steps

Because sample means were being tested, the is used to calculate the z-score.

How much greater is 1 than 0.1?

Why can't you compare 5 minutes and 240 seconds without making some kind of change

A bottle of water costs $1.50. Explain how you would make a graph of four ordered pairs to model the total cost of the water in terms of the number of bottles.

Simplify (4-8i) (2-7i)

Kira is a high school student who is also taking a class at her local community college. Kira rides the bus from the high school to the college, which are shown 1 inch apart on a map. The map uses a scale of 2 inches : 7.4 miles.

Identity function f (x) = c

A teenager consumes 20% of her calores each day in the form of protein. If she is getting 700 calories a day for protein, how many calories is she consuming per day?

What is 45% of 175? -pre algebra