Add or subtract, simplify completely

What is the value of sin20sin30sin40sin80.

There are 50 stars on each United States flag. Two flags have 100 stars. Three flags have 150 stars. The equation that describes the relationship is?

What is the factorization of x²+8x+7? A. (x²+x) (x+7) B. (x²) (x+7) C. (x) (x+7) ² + (x) (x+7) D. (x+1) (x+7)

Which relationships would most likely be causal? Check all that apply. A) a positive correlation between the number of homework assignments completed and the grade on the exam B) a positive correlation between the temperature in a canyon in the

Which angle measure below is not a possible measure of an exterior angle of a regular polygon? 45° 36° 40° 54°

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.