Evaluate the expression for the given variables.

3a - b; a=6, b=9

If m^2 + 8 = 39, then m^2-7=?

Y=-2x + 7 y = 5x - 7 i don't know how to do this question

Paulo had a rope that was 15 feet long. He cut off n feet of the rope to hang a bird feeder. Paulo now has 11 1/2 of rope left. Write an equation to represent the problem

Determine whether f (x) = 1/2x^2-x-9 has a maximum or minimum value and find the value

A 55% decrease followed by a 25% increase

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.