What's 5n+7=21 it's a two step equation

If n represents an even number, then which of the following statements is true? A. n : 7 represents an odd number B. n * 7 represents an even number C. n - 7 represents an even number D. n + 7 represents an even number

The position of an object at time t is given by s (t) = - 1 - 13t. Find the instantaneous velocity at t = 8 by finding the derivative.

Which one is longer nine tenths or ten ninths

Craig has £13.40 he sees this offer in a restaurant : main courses £8.90 each. Buy one main course and get the second half price. Can he afford to buy two main courses? Show your working

Each edge of a cube is 1.5 cm in length. what is the surface area of the cube

If P dollars is deposited in a savings account that pays interest at a rate of r % per year compounded continuously, find the balance after t years. (Round your answer to the nearest cent.) P = 100, r = 2 1/2, t = 12

Linda bought 56 books. Linda bought 8 times as many books as Pablo. let b be the number of books pablo bought

Which equation should be used to solve 81 + * = 108

Nadia started at 19.26 feet below sea level and then changed her altitude by climbing a total of 5,437.8 feet up from her initial position. What was Nadia's altitude at the end of her climb

A toy manufacturer needs a piece of plastic in the shape of a right triangle with the longer leg 6 cm more than the shorter leg and the hypotenuse 12 cm more than the shorter leg. How long should the sides of the triangle be?