Basic Mathematics for College Students

Find the best buy based on unit price. If a grocery store sells a 5-pound package of hamburger for $18.75, a consumer might want ...

5.1 Ratios 423 EXAMPLE (^10) Comparison Shopping Olives come packaged in a 10-ounce jar, which sells for $2.49, or in a 6-ounce ...

Consider the ratio. By what number should we multiply numerator and denominator to make this a ratio of whole numbers? What sho ...

Write each rate as a unit rate.See Example 9. 12 errors in 8 hours 114 times in a 12-month period 4,007,500 people living in 12 ...

BUDGETS Refer to the circle graph below that shows a monthly budget for a family. Write each ratio in simplest form. a. Find th ...

FINGERNAILS On average, fingernails grow 0.02 inch per week. Write this rate using whole numbers. INTERNET SALES A website dete ...

428 Chapter 5 Ratio, Proportion, and Measurement SECTION 5.2 Proportions Objectives 1 Write proportions. 2 Determine whether pro ...

Determine whether proportions are true or false. Since a proportion is an equation, a proportion can be true or false. A proport ...

    There is another way to determine whether a proportion is true or false. Before we can discuss it, we need to introduce ...

      Caution! We cannot remove common factors “across” an = symbol. When this is done, the true proportion from Example 3 ...

    Solve a proportion to find an unknown term. Suppose that we know three of the four terms in the following proportion. In ...

We have found that the unknown term in the proportion is 6 and we can write: To check this result, we find the cross products. C ...

434 Chapter 5 Ratio, Proportion, and Measurement Self Check 7 Solve the proportion: Now TryProblem 45 6.7 x  33.5 38 EXAMPLE 7 ...

Write proportions to solve application problems. Proportions can be used to solve application problems from a wide variety of fi ...

Self Check 10 SCALE MODELSIn a scale model of a city, a 300-foot-tall building is 4 inches high. An observation tower in the mod ...

5.2 Proportions 437 1 inch corresponds to6 feet as4.5 inches corresponds towfeet. SolveTo find the actual wingspan of the airpla ...

Success Tip In Example 11, an alternate approach would be to write each term of the proportion in its equivalent decimal form an ...

  Fill in the blanks. If the cross products of a proportion are equal, the proportion is. If the cross products are not equal ...

Solve each proportion. Check each result.See Example 6. Solve each proportion. Check each result.See Example 7. ...

RAMPS Write a ratio of the rise to the run for each ramp shown. Set the ratios equal. a. Is the resulting proportion true? b. I ...