Prove sin^2x + cos^2x = 1

Raphael wants to buy a new car He needs a down payment of 3000 if he saves 340 each month about how many months will it take him to save the down payment

Consider these signed numbers and determine whether each product is positive or negative. (-2/3) (5 2/4) Positive Negative (4 5/9) (4/5) (-6 3/4) (-7 1/11)

On an up hill hike Ted climbs at 3 mph. Going back down, he runs at 5 mph. If it takes him forty minutes longer to climb up than run down, then what is the length of the hike?

What is the sum of 5

How many solutions does this system have? 2x-4y=8 x+y=7

1 a. Rhian measures the height of one of her tomato plants as 20 cm. Next week it is 15% taller. What is its new height? 1 b. Another tomato plant grows from 240 cm to 312 cm. Calculate the percentage change in height.

Order these numbers from least to greatest. 1.5, 1.403, 1.43, 1.4312

What is the set of all possible outcomes of a probability experiment?

In this equation, is 6 a standard number. n + 6 = 20

Unoccupied 25 story towers sold for 3/4 off their original value. If the towers sold for 16 million what was the original value