If y varies directly as x, and y is 18 when x is 5, which expression can be used to find the value of y when xis 11

à - 18 (11)

y-1 (11)

y - (19) (5)

y-1315

The formula B=32A is used in New England to estimate the minimum furnace output, B, in BTUs, for a modern house with A square feet of flooring. Determine the minimum furnace output for a 1700 square foot modern house

Lincoln is working two summer jobs, making $13 per hour lifeguarding and $23 per hour tutoring. Last week Lincoln earned a total of $210 and worked 4 times as many hours tutoring as he worked hours lifeguarding.

The circumference of a circle is 53.38 cm. What is the radius of the circle?

Solve: 4 (a+3) = 12+4a

1) what is 1/5 times 1/2? 2) 1/5 times 3? 3) 3/5 times 1/6? 4) 4/12 times 1/2? 5) 1/7 divide 3/2?

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.