How do you prove adjacent sides are perpendicular?

Read the excerpt below and answer the question. as i said these things i got scared. it felt like worms and toads and slimy things crawling out of my chest, but it also felt good, that this awful side of me had surfaced, at last.

Which is the Best Buy? A) $10.88 for 7 tuna cans B) $11.55 for 6 tuna cans C) $17.25 for 9 tuna cans D) $15.31 for 8 cans of tuna?

All together, 3 people have 120 coins. mark has 3 times as many as joel, and joel has 1/2 as many as sandra. how many coins does sandra have?

Subtract the following polynomials, then place the answer in the proper location on the grid. Write the answer in descending powers of a. Subtract: 11a2 + 42a - 6 from 14a 2 - 24a + 7.

Nathan had an infection, and his doctor wanted him to take penicillin. Because Nathan's father and paternal grandfather were allergic to penicillin, Nathan had a 75% chance of having the same allergy.

Which is bigger 12 pints or 6 cups

A triangle with an perimeter of 23x-7 has two sides with lengths of 5x+7 and 8x-9. What is the length of the third side?

8. Simplify and solve this equation: 4m + 9 + 5m - 12 = 42. A. m = 5 B. m = - 5 C. m = 4 D. m = - 4

Which sequence matches the recursive formula? an = (an-1) 2 + 3, where a1 = 2 A) 2, 4, 16, 256, ... B) 2, 7, 17, 37, ... C) 2, 7, 52, 2707, ... D) 2, 25, 784, 6159, ...

A diver dives to a depth of - 25.6 feet below sea level. How many feet must the diver rise to reach sea level?