Friday

July 25, 2014

July 25, 2014

Posted by **Angie** on Monday, May 25, 2009 at 11:46am.

Pam is playing with red and black marbles. The number of red marbles she has is three more than twice the number of black marbles she has. She has 42 marbles in all. How many red marbles does Pam have?

a. 13

b. 15

c. 29

d. 33

- Math -
**DrBob222**, Monday, May 25, 2009 at 12:16pmLet R = # red marbles

and B = # black marbles.

===========================

R + B = 42

R = 3B + 3

Solve the two equations.

I have 13 for B and 29 for R but check me out. Check my work. Check my thinking.

- Math -
**Angie**, Monday, May 25, 2009 at 12:53pmthanks

**Related Questions**

math - sally has a bag with red,blue, and green marbles. She has twice as many ...

math - There are 3 white marbles, 8 red marbles, 3 blue marbles anf 1 black ...

Discrete Math - A bag contains 5 red marbles, 4 yellow marbles, 3 green marbles...

Math - Jim has a total of 77 red and blue marbles. The number of blue marbles is...

statistics - A box of marbles contains an equal number of red marbles and yellow...

statistics - Suppose a box of marbles contains an equal number of red marbles ...

Math - A bag of marbles contains only green and red marbles. All of the marbles ...

Math - 6 red marbles 5 yellow marbles and 4 blue marbles. Write a fraction in ...

Math ~ Check Answers ~ - 1. There are 35 marbles in a bag: 9 blue marbles, 8 ...

math - Suppose a box of marbles contains equal numbers of red marbles and yellow...