Standard form of 5x+15y=75

The price of a notebook was $3.15 yesterday. today, the price rose to $3.40. find the percentage increase. round your answer to the nearest tenth of a percent.

Minutes spent on homework 18,20,22,11,19,18,18

What is the radius and diameter of the following circle?

The length of a rectangle is 5 inches shorter than 3 times the width. Which expression represents the length of the rectangle in terms of the width, W? 3w+5 3w-5 5w+3 5w-3

Which expression is equivalent to 2 (a+2b) - a-2b

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.