GMATprep problems, please explain!

For which of the following functions is f(a+b) = f(a) + f(b) for all positive numbers a and b? a. f(x) = x^2 b. f(x) = x +1 c. f(x) = square root of x d. f(x) = 2/x e. f(x) = -3x A certain office supply store stocks 2 sizes of self-stick notepads, each in 4 colors: blue, green, yellow, or pink. The ...

How many integers from 0 to 50, inclusive, have a remainder of 1 when divided by 3? a.15, b.16, c.17, d.18, e.19 For this problem, I chose B, is it correct? If a and b are positive integers such that a-b and a/b are both even integers, which of the following must be an odd integer? a.a/2, b.b/2, c....

Please explain, thanks!

Escalating worldwide demand for corn has led to a sharp increase in the market price of corn, and corn prices are likely to remain high. Corn is extensive used as feed for livestock, and because profit margins are tight in the livestock business, many farmers are expected to leave the business. With...

Integer

How many integers from 0 to 50, inclusive, have a remainder of 1 when divided by 3? a.15, b.16, c.17, d.18, e.19 For this problem, I chose B, is it correct? If a and b are positive integers such that a-b and a/b are both even integers, which of the following must be an odd integer? a.a/2, b.b/2, c.(...

1. If a committee of 3 people is to be selected from among 5 married couples so that the committee does not include two people who are married to each other, how many such committees are possible? a. 20, b.40, c.50, d.80, e. 120 2. A certain business produced x rakes each month form Nov through Feb...

strenghthen question

Capuchin monkeys often rub their bodies with a certain type of millipede. Laboratory tests show that secretions from the bodies of these millipedes are rich in two chemicals that are potent mosquito repellents, and mosquitoes carry parasites that debilitate capuchins. Some scientists hypothesize tha...

Integer

What is the remainder when the positive integer n is divided by 3? 1. The remainder when n is divided by 2 is 1 2. The remainder when n + 1 is divided by 3 is 2 Joanna bought only $0.15 stamps and $0.29 stamps. How many $0.15 stamps did she buy? 1. She bought $4.4 worth of stamps 2. She bought an eq...

2 prolgems need help

1. If a committee of 3 people is to be selected from among 5 married couples so that the committee does not include two people who are married to each other, how many such committees are possible? a. 20, b.40, c.50, d.80, e. 120 2. A certain business produced x rakes each month form Nov through Feb ...