Find the vertex of this parabola: y=-4x^2+8x-12

The tree club plans to hike 20 miles today. The hikers have covered 6 miles so far. If they travel at an average speed of 2 1/2 how many hours will it take to complete the hike

Write an equation and solve. Round to the nearest hundredth where necessary. 58 is 100% of what number?

What does (cotθ) (sinθ) equals to?

Solve the system of equations y=3/2x-2 and 2x+y=-4

The sum of 3 and a number is added to 24

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.