What is the relationship between cos (90°) and cos (-90°) ?

a horse that is ill needs medication. the medication costs the veterinarian $17.50 to buy. He marked up the medication 54.2% before selling it to the customer. Find the final selling price of the horses medication

Translate: The product of the sum of 2X and 3y and the difference of 2x and 3y.

What is the exact value of 13pi/8

Benjamin Franklin bequeathed £1,000 (about $4,400 at the time) each to the cities of Boston and Philadelphia, in trust to gather interest for 200 years. When the trust came due in 1990, what was the approximate vale of the Boston Trust?

At a local clothing store, Morgan finds they are having a storewide 40% off sale. She also has a $15 coupon which applies to her total purchase.

1. y = (x - 1) (x + 3)

Alan found the value of the expression (15 - 6) 2 to be 189. Is he right? A) No, because first he should square 15 and 6. B) Yes, because first he should square 15 and 6. C) No, because first he should subtract 6 from 15.

What is 2 (2+5x) + 4 (1-8x) = -80

There are 350 students at miller middle school 12/25 of the students are girls. how many students are boys

Determine if the function is one-to-one. A decreasing line intercepting the y axis at 0,4