Sarah bought pencils and markers for school. She bought 3 times as many pencils as markers. The pencils cost $0.15 each and the markers cost $0.30 each. In total, Sarah spent $7.50 on
pencils and markers. How many pencils did Sarah buy?
1. Define a variable for this problem. (For example: ' n = hours watching tv")
2. Create a model in words or in numbers that could solve this problem.
3. Solve the problem.

Sarah bought 30 pencils

Step-by-step explanation:

1. Let define p, as the number of pencils bought, and m, as the number of markers bought.

2.

3. Substitute p in the first equation to 3m since p=3m as defined.

plug m into equation p=3m to find the number of pencils bought

the cat is blue because the probability of extension towards the prefix of the diameter of the circle could only mathematically equal to the sum of the roots of the carrots from   your garden.

step-by-step explanation: