How do I translate twice r plus 7 is equal to 45 minus r into an equation?

N is the set of real number that are factors of 36

What is 3 feet in 5s.

Find the measure of each angle: Supplementary angles with measures (2x+3) ° and (3x+2) °.

PH is given by the formula pH = - log [H+] where (H+) is the concentration of hydrogen in moles per liter. If the pH of Bill's swimming pool is 7.8 and the pH of Maura's swimming pool is 7.

The formula for the circumference of a circle is C=2 3.14r. Determine the circumference when the radius r is 10 cm.

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.