Prove that sin alpha * sin (90 - alpha) - cos (90-alpha) * cos alpha

Which order from least to greatest of 2.8, 2.8x10², 2.8x10⁻3, 2.8x10⁴, 2.8x10⁻5

In the slope - intercept equation of a line which quantity is given by the coefficient of the term x-term?

Estimate the sum by rounding each mixed number to the nearest half or whole number. 8 2/9 + 3 11/10

0.08 is 10 to as great as

In 2010, the population of Houtston, Texas was 2,099,451 and the population density was 3,501 people per square mile. What was Houston's land area in 2010? Enter your answer as a decimal in the box. Round your answer to the nearest tenth.

What r three rectangles with an area of 300 square feet?

Write the following sentence as an equation. The quotient of 120 and twice 20 is equal to 3.

The XYZ company is seeing it's worth declining at a rate of 3.2% per year. If the current worth is 2,300,000, what will the value be in 5 years? A.) about $1,954,810 B.) about$2,692,318 C.) about $1,932,000 D.) about $1,951,836

Suppose you take a random sample from a normal population and you want to determine whether there is sufficient statistical evidence to claim that the population variance differs from a corresponding variance specified in a government contract.

What is the slope of the line represented by the equation y= x+ ? o -~ o | o -|- o -|