Exercise 20 Page 7

Substitute - 4 for a, - 0.8 for b, 5 for c, and 15 for d.

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Practice makes perfect

To evaluate the given expression for a = - 4, b = - 0.8, c= 5, and d= 15, we should substitute these values into the expression and simplify as much as possible.

ac/d+b

SubstituteValues

Substitute values

- 4( 5)/15+(- 0.8)

Multiply

- 20/15+(- 0.8)

▼

Simplify denominator

AddNeg

a+(- b)=a-b

- 20/15- 0.8

WriteDec

Write as a decimal

- 20/0.2- 0.8

SubTerm

Subtract term

- 20/- 0.6

DivNegNeg

- a/- b=a/b

20/0.6

ExpandFrac

a/b=a * 5/b * 5

100/3

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Write fraction as a mixed number

WriteSum

Write as a sum

99+1/3

WriteSumFrac

Write as a sum of fractions

99/3+1/3

CalcQuot

Calculate quotient

33+1/3

AddTerms

Add terms

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Subchapter links

Check Your Understanding p.7

Practice and Problem Solving p.7-9

H.O.T. Problems p.9

Standardized Test Practice p.10

Spiral Review p.10

Skills Review p.10

Exercise 20 Page 7

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