Exam 1: Introduction to Real Numbers and Algebraic Expressions

Substitute to find the value of the expression. -In one store, bananas cost 60 cents per pound. The cost, in dollars, of x pounds of bananas is $0.6 \mathrm { x }$ . What is the cost of $1.3$ pounds of bananas?

Divide, if possible. - $- 40 \div ( - 8 )$

Subtract. -37 - 13.20

Multiply. -3(2 + m)

Divide, if possible. - $\frac { 50 } { - 2 }$

Simplify. -13 + (-14)+ 15 + (-19)+ 13 + (-8)

Subtract. -5.769 - (-0.52)

Add. Do not use a number line except as a check. - $- \frac { 1 } { 5 } + \frac { 3 } { 5 }$

Substitute to find the value of the expression. -Traveling at r kilometers per hour for t hours, a driver will travel rt kilometers. How far will Danny travel in 10 hours at a speed of 99 kilometers per hour?

Evaluate. -x + y, when x = 3 and y = 8

Rewrite the division as a multiplication. - $\frac { 2 x + 7 } { 8 }$

Simplify. - $\frac { - 35 m n } { 49 m n }$

Simplify. - $- \frac { 54 t } { 30 t }$

Solve the problem. -The two charts show the weight gain of some people and the weight loss of other people. Use the information given to answer the question below. What is the difference between the weight gain of Abe and the weight loss of Frank?

Multiply. -9(7x + 2)

Simplify. - $\frac { 64 - 4 \cdot 4 } { 2 ^ { 3 } \div 2 ^ { 2 } - ( - 2 ) ^ { 2 } }$

Evaluate -x for the given value of x. -x = 5.1

Simplify. -(7 + 2)[6 + (2 + 4)]

Find the reciprocal, if it exists. - $\frac { 1 } { 2.3 }$

Divide, if possible. - $- 120 \div ( - 8 )$