What is the solution of 7x+21=21

Write the following numbers used in these statements in scientific notation. (Note: Some of these numbers have been rounded.) The acceleration due to gravity on the sun is 900 ft/s^2

Evaluate: - 7 - (-8) + (-3) + 6 - 2

258/300 what's the smallest contestants

Alexa made 2 2/5 quarts of hot chocolate. Each mug holds 4/5 of a quart. How many mugs will Alexa be able to fill?

Equivalent amounts of money have the same value. True or False.

What is the answer too this (3x+3) (x+4)

If i hace 2 f's and i am homeschooled will i get held back and repeat the 7th grade?

6*10^-2 is how many times as 2•10-8

If 5 potatoes together have a mass of 1 kilogram and 8 pears together have a mass is 1,200 grams, which has the greater mass, a potatoe or a pear? Explain.

Minor's driver license requirements includes your parent (s) or guardian (s) signature (s) on your instruction permit stating that you have completed 50 hours of supervised driving practice with 10 hours of driving at night.