What is a explanatory variable?

Prove:cosec 2A + cosec 4A = cot A-cot 4A

Add 5 and 14, triple the sum and then add 4/5

A multivitamin tablet contains 16.5. How much vitamins c does a bottle of 30 tablets contain? Write your answer in grams?

which expression is equivalent to the expression shown? 3 to the power of 7 X 3 to the power os negative 4

A circle fits in a square with sides of 12 inches. What is the approximate area of the shaded region between the square and the circle? (Use 3.14 for Pi and round to the nearest whole number.)

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.