Explore BrainMass
Share

# A number of algebra practice questions and solutions

This content was STOLEN from BrainMass.com - View the original, and get the already-completed solution here!

Evaluate.

((-1)2 - 3)3 + 5 · (-5)

Simplify the following expression:

When converting from Fahrenheit degrees to Celsius degrees , a well known formula is used:
. Solve for .

Simplify.

Simplify.

Simplify.

Rewrite the following without an exponent.

Simplify.

Simplify.
3w2w-2 · 4v-9v · 2x-8x8

Simplify.

Multiply.

Multiply.

Rewrite without parentheses and simplify.

Multiply.

Factor
.
Factor.

Factor.

Factor:

Factor:
.

Simplify.
21n4/3x4y2 / 7mn2/9x3y

Simplify.

Solve for :
.

Solve for .

Solve the following proportion for .

Milan runs miles in minutes. At the same rate, how many miles would he run in minutes?

Rewrite the following in simplified radical form.

Assume that all variables represent positive real numbers.

Simplify as much as possible.

Assume that all variables represent positive real numbers.

Simplify.

Assume that all variables represent positive real numbers.
Rationalize the denominator and simplify.

Solve for , where is a real number.

Solve for , where is a real number.

Find the value of .

Write the following in simplified radical form.

Solve for .

Solve the equation

for .

Solve , where is a real number.

Use the quadratic formula to solve for .

Write in simplified radical form by rationalizing the denominator.

Simplify.

Assume that all variables represent positive real numbers.
Multiply.

Simplify as much as possible.

Assume that all variables represent positive real numbers.

Simplify.

Use the quadratic formula to solve for .

Solve for .

Simplify.

Rewrite the following without an exponent.

https://brainmass.com/math/basic-algebra/number-algebra-practice-questions-solutions-354674

#### Solution Preview

Evaluate.

((-1)2 - 3)3 + 5 · (-5)

= {(-1 x -1) - 3}3 + 5 x -5

= {1 - 3}3 - 25

= {-2}3 - 25 = -8 - 25

= - 33

Simplify the following expression:

= -2w -2u -3*(-4u) -3*(-6u)

= -2w - 2u +12u +18u

= 10w + 16u

When converting from Fahrenheit degrees to Celsius degrees , a well known formula is used:
. Solve for .

9C = 5{F - 32}

9C = 5F - 5 x 32

9C = 5F - 160

5F = 9C + 160

F = {9C + 160}/5

F = 9/5*{C +160/9}

Simplify.

= y1 x y5 x y3

= y(1 + 5 + 3)

= y9

Simplify.

= z(6 - 5)*x(3 - 4)

= z*x-1

= z/x

Simplify.

= {x4}3/({-2}3{y}3)

= x(4 x 3)/{(-2 x -2 x -2)*y3}

= x12/-8y3

= -x12/8y3

Rewrite the following without an exponent.

Exponent of -1 means invert the fraction so

= 7/8

Simplify.

= u(-5 x 4)

= u-20

The negative exponent means invert and turn the exponent to a positive thus

= 1/u20

Simplify.
3w2w-2 · 4v-9v · 2x-8x8

= 3w(2 - 2). 4v(1 - 9).2x(8 - 8)

= 3*4*2w0.v-8.x0

Any variable to the power of zero is just 1 thus

= 24v-8

A negative exponent means we invert the variable v and change the expeonent to a positive exponent thus

= 24/v8

Simplify.

= -5u2 + 2u + 1 - 7u + 8 -2u2 -1(4u) -1(-1)
= -5u2 - 2u2 +2u - 7u - 4u + 8 + 1 + 1
Collect u2 , u and number terms together we get
= -7u2 - 9u + 10

Multiply.

= 4*3*4w(4 + 2).v(1 + 9)

= 48w6.v10
Multiply.

= x*x +7*x - 3*x -3(7)

= x2 +4x - 21
Rewrite without parentheses and simplify.

= (3u - 2)*(3u - 2)

= 3u*3u -2(3u) -2(3u) -2(-2)

= 9u2 - 6u - 6u + 4

= 9u2 - 12u + 4

Multiply.

= 3u*6u + 3u*3w + 3u*1 - 5*(6u) - 5(3w) -5(1)
= 18u2 + 9uw + 3u - 30u - 15w - 5
Collecting like terms together
= = 18u2 + 9uw - 27u - ...

#### Solution Summary

A number of algebra practice questions and solutions.

\$2.19

## 29) Solve then graph: 5x >= 30 ...[See the attached question file for all the questions.]

29) Solve then graph
5x >= 30
30) Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 80 miles per hour and train B is traveling at 100 miles per hour. Train A passes a station at 3:5 a.m. If Train B passes the same station at 3:30 a.m., at what time will train B catch up to train A.
When will train B catch up with train A? ____:_____ am or pm
66)The equation y=1777x+27,153 can be used to predict the number y of gun deaths in the united states x years after 2000, that is x=0 corresponds to 2000,x=3 corresponds to 2006 and 2009. In what year will the number of gun deaths be 7606
The predicted gun deaths in 2006 will be__?__
The predicted gun deaths in 2009 will be __?___
The predicted number of gun deaths will be 7606 in what year ___?__
584) the length of a rectangle is fixed at 24cm. what widths will make the perimeter greater than 82cm?
The with must be greater than __?__cm
600) Solve by the substitution method
9x+5y=-58
x=-5-2y
what is the solution of the system? (Type an ordered pair )

[See the attached question file for all the questions.]

View Full Posting Details