#### Transcript Solve Equations Word Problems Examples

## Solve Equations Word Problems

A school has $6500 budgeted for textbooks. The principal wants to buy 120 new geography textbooks for $39.95 each. How much money will be left in the textbook budget after the purchase?

### Use the formula I = prt

Find the interest after two years at 5% with a principal deposit of $1000.

### Use I = prt

How much would need to be deposited to gain an interest of $75 at a rate of 3% over five years?

### Money

Mr. Thomsen plans to purchase a used car priced at $8400. He will receive a 15% employee discount and then will have to pay a 5.5% sales tax. What will be the final price of the car?

### Average

Bill Gutierrez drove at a speed of 65mph for two hours. He then drove for 1.5 hours at a speed of 45mph. What was his average speed?

### Mixtures

Chocolate chip cookies sell for $6.95 per pound and white chocolate cookies for $5.95 per pound. How many pounds of chocolate chip cookies should be mixed with 4 pounds of white chocolate cookies to obtain a mixture that sells for $6.75 per pound.

### D=RT

Two cyclists begin traveling in opposite directions on a circular bike trail that is 5 miles long. One cyclist travels 12 miles per hour, and the other travels 18 miles per hour. How long will it be before they meet?

### #13 on homework

In Mrs. Martinez’s science class, a test is worth three times as much as a quiz. If a student has test grades of 85 and 92 and quiz grades of 82, 75, and 95, what is the student’s average grade?

### Number 14

At Westbridge High School, a student’s grade point average is based on the student’s grade and the classs credit rating. Brittany’s grades for this quarter are shown. Find Brittany’s GPA if a grade of A equals

**Class Credit Rating Grade**

4 and a B equals 3.

Algebra 1 A Science 1 A English Spanish 1 1 B A Music 1/2 B

### Number 15-18

In 2005, the international price of gold was $432 per ounce, and the international price of silver was $7.35 per ounce. Suppose gold and silver were mixed to obtain 15 ounces of an alloy worth $177.21 per ounce.

15. copy and complete the table below.

**# of ounces $ per ounce value**

Gold Silver Alloy g 15-g

16. Write an equation to represent the problem.

17.

How much gold was used in the alloy?

18.

How much silver was used in the alloy?

### Number 19

The Madison High School marching band sold solid-color gift wrap for $4 per roll and print gift wrap for $6 per roll. The total number of rolls sold was 480, and the amount of money collected was $2340. How many rolls of each kind of gift wrap were sold?

### Number 20-23

Party Supplies Inc. sells metallic balloons for $2 each and helium balloons for $3.50 per dozen. Yesterday, they sold 36 more metallic balloons than dozens of helium balloons. The total sales for both types of balloons were $281.00. 20.Copy and complete the table representing the problem.

**Number Price Total Price**

Metallic Dozens of Helium

21. Write an equation to represent the problem.

22.

How many metallic balloons were sold?

23.

How many dozen helium balloons were sold?

### Number 24

Lakeisha spent $4.57 on color copies and black-and-white copies for her project. She made 7 more black-and-white copies than color copies. How many color copies did she make?

**Type of copy Cost per page**

color $0.44

Black-and-white $0.07