20q - 5r = 45

write down the value of 4q-r

You measure the lengths of three worms for a biology experiment. The shortest worm is 1.28 inches and the largest worm is 1.285 inches. Which of the following could not be the length of the third worm? A. 1.2809 in B. 1.281 in C. 1.284 in S. 1.

Two gears in a machine are aligned by a mark drawn from the center of one gear to the center of the other. If the first gear has teeth, and the second gear has teeth, how many revolutions of the first gear are needed until the marks line up again?

What the distance of 3,3 and - 9,-6? a. 9 b. 5 c. 12 d. 15

6² / (6+3) + 18 / 3 - 3² / - divided by

What is a d intercept

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.