Write 1,390,000,000 in scientific notation?

The population of town is increasing by 400 inhabitants each year. If it's population at the beginning of 1990 was 28,852, what was it's population at the beginning of 2000?

Five added to 6 times a number is equal to 2 less than 8 times the number. What is the number?

Enter the value of b that makes the statement true: 5xb is less than 5 but greater than 0.

6. The Frosty Ice-Cream Shop sells sundaes for $2 and banana splits for $3. On a hot summer day, the shop sold 8 more sundaes than banana splits and made $156. How many banana splits were sold?

A store sells 214 pounds of tomatoes in a package for $4.45. The expression 4.45p represents the cost of the tomatoes for a number of packages. What does the variable p represent?

I think was a step involved in performing an experiment

Which equation expresses 9-3 rewritten as an addition

Julia is going for a walk through the neighborhood. What unit of measure is most appropriate to describe the distance she walks?

1/8 (3d-2) = 1/4 (d+5) idk

What's this answer y=10 4x-5y=3