Which pair of equations represents perpendicular lines?

a. y=2x-7, y=-0.5x-7

b. y=2x+7, y=2x-7

c. y=2x+7, y=x+7

d. y=2x+7, y=-2x-2

Prime numbers are closed under subtraction

How to solve 6p^2-42p-48

Find the nth term of 1,4,3,16,5,36,7

Let f (x) = (x+4) ^2-3. Let g (x) = (x+4) ^2+6. Which statement describes the graph of g (x) with respect to the graph of f (x) ? a) It is translated up 9 units. b) It is stretched horizontally by a factor of - 4.

Edison has a dog walking business. He earns $6.00 for each dog that he walks. Edison walked 4 dogs on Friday, 6 dogs on Saturday, and some additional dogs on Sunday. He earned a total of $108.00 for those three days.

A medical school claims that more than 28% of its students plan to go into general practice. It is found that among a random sample of 130 of the school's students, 32% of them plan to go into general practice.

A lottery has a grand prize of $160,000, two runner-up prizes of $20,000 each, eleven third-place prizes of $4000 each, and twenty-one consolation prizes of $800 each.

Re-write the decimal 045 as a fraction. Explain how you know your answer is correct.

Turkey weigh 7kg how long to cook

The velocity function for a particle is v (t) = 2t - 5 ft/sec. Find the displacement for the particle from t = 0 to t = 4 sec. (Give answer with units)