Which expression equals 1?

a. sin (x) + cos (x)

b. sin^2 (x) + cos^2 (x)

c. sin^2 (x) - cos^2 (x)

d. sin (x) - cos (x)

A satellite is 18 meters long. A model of it was built with a scale of 1 centimeter : 3 meters. How wide is the model?

Zach had 1 quart of milk. He used 1 pint to make pancakes and 1 cup to make scrambled eggs. How many cups of milk were left?

Which of the following best describes 6x^3 - 5y^2 according to the number of terms? A. monomial B. Trinomial C. binomial

In ΔRST, the measure of ∠T=90°, ST = 8.7 feet, and TR = 7.1 feet. Find the measure of ∠S to the nearest degree.

A rectangular counter 3 feet wide and 5 feet long has a circle cut out of it in order to have a sink installed. The circle has a diameter of 18 inches. What is the approximate area of the remaining countertop surface? Use 3.14 for pi.

What is the product? (9t-4) (-9t-4) a) - 81t^2-16 b) - 81t^2+16 c) - 81t^2 - 72t+16 d) - 81t^2 + 72t+16

The mean weight of 8 girls is 55kg and the mean weight of a group of boys if 52kg. the mean weight of all the students is 53.2kg. how many boys are there?

Six times the sum of a number and four

Solve: The total cost (C) in dollars for building a house of x square feet is given by the function C (x) = 50,000 + 155x. If the total cost was $283,275.00, how many square feet was the house?

Simplify the algebraic expression. y2 + 11y - 6y + y2