123b is 0.4 of what number

The sum of Janos' age and David's age is 34 years. Five years ago the sum of twice Janos' age and three times David's age was 61 years. What are their present age?

Flogx=219.27, G. M = 67.19 Find f

Mrs. Varner deposited q dollars in a bank account that has been earning annual interest. The total value of the account is based on the function f (x) = q • 1.025x, where x represents the number of years the money has been in the account.

Which equation is equivalent to Log5 (4W) = 7?

Pete drove 224 miles in 4 hours on saturday. If he drives at the same rate on Sunday, how long would it take him to drive 490 miles?

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.