3x-4 when x = 7 how do I do this equation I'm confused

What does 7m=28 mean

Charmaine's penny bank is 2/3 full. After she removes 160 pennies, it is 4/9 full. How many pennies can Charmaine's bank hold?

Atasha is solving the equation x^2-x=-3 with the quadratic formula. What values should she use for a, b and c?

What is 18 divided by 1234

How many liters of spring water are in 6 bottles if each bottle contains 0.33 liter of spring water? Round your answer to the nearest liter.

After putting 5 gallons of gas into your car, the tank was full. If the tank holds 13 gallons, how much gas was in it before you filled it up?

Amber has 500 shopkins and she gives 150 to her cousin Zairis. How many does Amber have Now.

A recipe requires 1/3 cup of milk for each 1/4 cup of water. How many cups of water are needed for each cup of milk

A store offers 20% off all items. If x is the original price, which expression represents the final price with the discount? select all that apply. A. 1.2x B. 0.08x C. x D. x - 0.2x E. x + 0.2x

What is 8.49*10-7 in decimal form 0.0000000849 i think this one? 0.000000849 8,490,000 849,000,000