The square root of a number is 15

Let f (x) = (3) x-3. Evaluate f (0) without using a calculator.

What is the y-intercept of the equation 5x - 6y = 18? A.-6 B. - 3 C. 5 D. 18

Shoko bought a box of popcorn for$3.50 and three medium drinks. Define a variable and write an expression to represent the total amount they spent. Then find the total amount if one drink costs $1.50

1 + - x = 3/5. What is x? (X is also negative)

A school district's income from property taxes was estimated at $1.4 million last year, but the actual income came in at $1.25 million. What was the absolute error in the estimation?

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.