Exercise 11 Page 247

Substitute 12 for r and -6 for t in the expression. When dividing real numbers, the quotient will be positive if the signs are the same and it will be negative if the signs are different.

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Practice makes perfect

To evaluate the given expression for r=12 and t=-6, first, we should substitute these values into the expression and simplify.

t-r/3

SubstituteII

r= 12, t= -6

-6- 12/3

SubTerm

Subtract term

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When dividing real numbers, the quotient will be positive if the signs are the same and it will be negative if the signs are different.

cc Same Sign & Different Signs (+)÷(+)=(+) & (+)÷(-)=(-) (-)÷(-)=(+) & (-)÷(+)=(-) In our case one number is positive and one number is negative, so the quotient will be negative.

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MoveNegNumToFrac

Put minus sign in front of fraction

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CalcQuot

Calculate quotient

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We can verify this using a calculator.