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Chapter 1: Q46. (page 7)

Evaluate the experssion when a=2.5,鈥�b=15,andc=3.5

localid="1648024411816" c-a

Short Answer

Expert verified

The value of the expression is 1.

Step by step solution

01

Step-1 – Apply the concept of addition and subtraction

Two numbers with similar signs get added and the resulting number carries the similar sign.

Two numbers with opposite signs get subtracted and the resulting number carries the sign of the larger number.

02

Step-2 – Apply the concept for addition and subtraction of decimals

To add or subtract two decimal numbers, write the numbers vertical with decimal point aligned vertically.

For example: to add the numbers 2.3 and 4.62, write these numbers vertically and add as shown below

鈥夆赌夆赌�2.3+4.62炉鈥夆赌夆赌�6.92

03

Step-3 – Evaluate the expression

To evaluate the expression c-a, substitute the values of c as 3.5 and value of aas 2.5 and subtract the numbers as shown below,

鈥夆赌夆赌夆��3.5鈭�鈥�2.5鈥夆赌夆赌�炉鈥夆赌夆赌夆��1.0

Thus, the value of the expression is 1.

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Most popular questions from this chapter

DVD Rentals You belong to an online DVD rental service. Your yearly rental budget is \(200. Each rental costs \)4.

a. Copy and complete the table.

b. Write a variable expression for the cost of r rentals.

c. Write a variable expression for the amount of your budget left after r rentals.

d. Writing How many DVDs will you be able to rent before the $200 is spent? Explain how you found your answer.

Music Competition The double bar graph shows three students鈥� scores in a music competition. A student鈥檚 final score is the sum of the points for technique t and for interpretation i.

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c. Interpret You earn 35 points for technique. At least how many points must you earn for interpretation to have a higher score than students A, B, and C?

Find the sum or difference. (p. 749)

7.3-2.1

Find the product or quotient. (pp. 750, 751)

6.54.3

Evaluate the experssion when a=4,鈥�b=2,andc=16

localid="1647950190566" 鈥�c-a
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