What are the key roles when adding and subtracting fractions

What is cos^2x (sec^2x - 1)

Triangular pyramid:volume 270cm3; base edge 15cm; height of base4 cm

the angle of depression from an eagle sitting on top of a flagpole to base tree is 63. If the flag pole is 18 feet tall, then what is the distance between the pole and tree?

Two cars leave town at the same time going in the same direction on the same road. One travels 32 mi/h and the other travels 47 mi/h. In how many hours will they be 69 miles apart?

Darius is offered a choice between two gambles on a fair coin flip: (1) pay $100, win $110 on either heads or tails. (2) pay $100, win $120 on heads and $70 on tails. darius chooses (2). what sort of attitude does this choice reveal?

A political party sends a mail survey to 1500 randomly selected registered voters in a community. The survey asks respondents to give an opinion about the job performance of the current President.

What is 965.38 rounded to the nearest tenth?

If the volume of a cylinder solid is 1320m^3 and base area is 264m^2 find its height

Find 13 - 0.45. 12.55 13.45 14.45 11.55

How many terms are in this expression? 4x + 3y - 12x + 5