What do you do with mean

When they give you a x intercept and y intercept how do you write the equation

If the mean time between unscheduled maintenance of LCD displays in a hospital's CT scan facility is 4000 hours, what is the probability of unscheduled maintenance in the next 6000 hours

Hideki makes a quilt that has a length of 6 feet and an area of 36 feet. If he increases the length to 8 feet, and the width stays the same how much will the area increase? A 6 square feetB 12 square feet C 48 square feetD 20 square feet

A number h less the quotient of a number k and 5

Decrease 160 by 6%.

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.