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Practice Test

631.

Determine whether each number is a solution to the equation 6x3=x+206x3=x+20.

5 235235

In the following exercises, solve each equation.

632.

n 2 3 = 1 4 n 2 3 = 1 4

633.

9 2 c = 144 9 2 c = 144

634.

4 y 8 = 16 4 y 8 = 16

635.

−8 x 15 + 9 x 1 = −21 −8 x 15 + 9 x 1 = −21

636.

−15 a = 120 −15 a = 120

637.

2 3 x = 6 2 3 x = 6

638.

x 3.8 = 8.2 x 3.8 = 8.2

639.

10 y = −5 y 60 10 y = −5 y 60

640.

8 n 2 = 6 n 12 8 n 2 = 6 n 12

641.

9 m 2 4 m m = 42 8 9 m 2 4 m m = 42 8

642.

−5 ( 2 x 1 ) = 45 −5 ( 2 x 1 ) = 45

643.

( d 9 ) = 23 ( d 9 ) = 23

644.

1 4 ( 12 m 28 ) = 6 2 ( 3 m 1 ) 1 4 ( 12 m 28 ) = 6 2 ( 3 m 1 )

645.

2 ( 6 x 5 ) 8 = −22 2 ( 6 x 5 ) 8 = −22

646.

8 ( 3 a 5 ) 7 ( 4 a 3 ) = 20 3 a 8 ( 3 a 5 ) 7 ( 4 a 3 ) = 20 3 a

647.

1 4 p 1 3 = 1 2 1 4 p 1 3 = 1 2

648.

0.1 d + 0.25 ( d + 8 ) = 4.1 0.1 d + 0.25 ( d + 8 ) = 4.1

649.

14 n 3 ( 4 n + 5 ) = −9 + 2 ( n 8 ) 14 n 3 ( 4 n + 5 ) = −9 + 2 ( n 8 )

650.

9(3u2)4[68(u1)]9(3u2)4[68(u1)] =3(u2)=3(u2)

651.

Solve the formula x2y=5x2y=5 for y
when x=−3x=−3
in general

In the following exercises, graph on the number line and write in interval notation.

652.

x −3.5 x −3.5

653.

x < 11 4 x < 11 4

In the following exercises,, solve each inequality, graph the solution on the number line, and write the solution in interval notation.

654.

8 k 5 k 120 8 k 5 k 120

655.

3 c 10 ( c 2 ) < 5 c + 16 3 c 10 ( c 2 ) < 5 c + 16

In the following exercises, translate to an equation or inequality and solve.

656.

4 less than twice x is 16.

657.

Fifteen more than n is at least 48.

658.

Samuel paid $25.82 for gas this week, which was $3.47 less than he paid last week. How much had he paid last week?

659.

Jenna bought a coat on sale for $120, which was 2323 of the original price. What was the original price of the coat?

660.

Sean took the bus from Seattle to Boise, a distance of 506 miles. If the trip took 723723 hours, what was the speed of the bus?

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