40% of what number is 80?

If 30% of a number is 15 what is the original number?

Jada solved the equation - 4/9=x/108 for x using the steps below. What was Jada's error?

Write an equation of the line satisfying the given choices. Perpendicular to x-2y=7; y-intercept (0,-8) What is the equation of the line?

Luis wants to buy a skateboard that usually sells for 79.99. All merchandise is discounted by 12%. What is the total cost of the skateboard if Luis has to play a state sales of 6.75%?

Evaluate the expression for the given values of the variables. 4a+7b+3a-2b+2a; a=-5 & b=3 a) 17 b) - 5 c) - 20 d) - 30

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.