Choose the correct product of (9x - 5) (9x + 5).

81x2 + 90x + 25

81x2 - 25

81x2 + 25

81x2 - 90x + 25

The lines shown below are perpendicular. if the green line has a slope of 1/7, what is the slope of the red line?

Write an equation of a line in standard form with a x intercept of - 5 and a y intercept of 15.

In the figure, the angles are formed by a transversal and two parallel lines. Which angles seem to be congruent

Amy is flying for the first time. the dispatcher tells her to fly at 500 meters above the ground the ground of higher. write an inequality to represent the height in meters, h, at which Amy can fly

How to solve - 5x+y = -2

What number is 62.5% of 195?

2/w=0.4/0.7 what is w?

2.6 as an improper fraction

The length of a rectangle is 7cm less than twice it's width. If the area is 30 sq. cm, find the dimensions

Heights of 10 year-olds, regardless of gender, closely follow a normal distribution with mean 55 inches and standard deviation 6 inches. Which of the following is true? Roughly 95% of 10 year-olds are between 37 and 73 inches tall.