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Intermediate Algebra
Linear Equations and Inequalities in One Variable

1
Linear Equations

Problem 1

Determine whether \(4\) is a solution of \(3x-1=11\).

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Molly S. cc
Molly S.
Octabio
Octabio
Cynthia spanish language icon
Cynthia
Problem 2

Determine whether \(-12\) is a solution of \(\dfrac{1}{3}x+2=-\dfrac{1}{4}x+1\)

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Molly S. cc
Molly S.
Octabio
Octabio
Cynthia spanish language icon
Cynthia
Problem 3

Find the solution set for \(3a - 5 = -6a + 1\)

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Mr. McKeague cc
Mr. McKeague
Brooke cc
Brooke
David cc
David
David spanish language icon
David
Problem 4

Solve \(\displaystyle\frac{2}{3}x+\displaystyle\frac{1}{2}= \displaystyle-\frac{3}{8}\)

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Mr. McKeague cc
Mr. McKeague
Arielle cc
Arielle
Matt cc
Matt
Cynthia spanish language icon
Cynthia
Problem 5

Common Mistake This is a mistake in using notation incorrectly.

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Mr. McKeague cc
Mr. McKeague
Problem 6

Solve \(0.06x+0.05(10,000-x)=560\)

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Mr. McKeague cc
Mr. McKeague
Betsy cc
Betsy
Aaron cc
Aaron
Julieta spanish language icon
Julieta
Problem 7

Solve \(8-3(4x-2)+5x=35\)

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Mr. McKeague cc
Mr. McKeague
Arielle cc
Arielle
David cc
David
David spanish language icon
David
Problem 8

Solve \(2(3x-4)=3+6x\)

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Mr. McKeague cc
Mr. McKeague
Betsy cc
Betsy
Aaron cc
Aaron
Julieta cc spanish language icon
Julieta
Problem 9

Solve \(-15+3x=3(x-5)\)

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Mr. McKeague cc
Mr. McKeague
Betsy cc
Betsy
Anthony cc
Anthony
Anthony spanish language icon
Anthony

2
Formulas

Problem 1

Find \(y\) when \(x=4\) in the formula \(3x+2y=6\).

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Molly M. cc
Molly M.
Betsy
Betsy
Aaron
Aaron
David spanish language icon
David
Problem 2

A store selling art supplies find that they can sell \(x\) sketch pads each week at \(p\) dollars each, according to the formula \(x=900-300p\). What price should they charge if they want to sell \(525\) pads each week?

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Aaron
Aaron
Brooke cc
Brooke
Edwin spanish language icon
Edwin
Julieta spanish language icon
Julieta
Problem 3

A boat is traveling upstream against a current. If the speed of the boat in still water is \(r\) and the speed of the current is \(c\) then the formula for the distance traveled by the boat is \(d=(r-c) \cdot t\) where \(t\) is time. Find \(c\) if \(d=52\) miles, \(r=16\) miles, and \(t=4\) hours.

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Betsy cc
Betsy
Aaron cc
Aaron
Cynthia spanish language icon
Cynthia
Problem 4

Given the formula \(P=2w+2l\), solve for \(w\).

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Molly S. cc
Molly S.
Betsy cc
Betsy
Logan cc
Logan
Cynthia spanish language icon
Cynthia
Problem 5

Solve for \(x\); \(ax-3=bx+5\)

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Betsy cc
Betsy
Edwin spanish language icon
Edwin
Problem 6

Solve for \(y\): \(\displaystyle\frac{y-b}{x-0}=m\)

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Betsy
Betsy
Graham
Graham
Edwin spanish language icon
Edwin
Problem 7

Solve for \(y\): \(\displaystyle\frac{y-4}{x-5}=3\)

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Molly S. cc
Molly S.
Betsy cc
Betsy
Logan cc
Logan
Cynthia spanish language icon
Cynthia
Problem 8

Solve for \(h\): \(S=2\pi rh+2\pi r^2\)

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Betsy
Betsy
Graham
Graham
Edwin spanish language icon
Edwin
Problem 9

The first Ferris wheel had a diameter of \(250\) feet. It had \(36\) carriages and each of which held \(40\) people. One trip around took \(20\) minutes. Find the average speed of a rider. (Use \(3.14\) as an approximation for \(\pi\)).

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Betsy
Betsy
Graham
Graham
Cynthia spanish language icon
Cynthia

3
Applications

Problem 1

The length of a rectangle is \(3\) inches less than twice the width. The perimeter is \(45\) inches. Find the length and width.

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Brooke cc
Brooke
Aaron cc
Aaron
Edwin spanish language icon
Edwin
Problem 2

In April, Pat bought a Ford Mustang with a \(5.0\)-liter engine. The total price, which includes the price of the car plus sales tax, was \(\$17,481.75\). If the sales tax rate was \(7.25\%\), what was the price of the car?

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Ana
Ana
Aaron
Aaron
Julieta spanish language icon
Julieta
Problem 3

Two complementary angles are such that one is twice as large as the other. Find the two angles.

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Stephanie cc
Stephanie
Aaron
Aaron
Cynthia spanish language icon
Cynthia
Problem 4

A person invests \(\$10,000\) in two accounts. One account earns a \(5\%\) annually, and the other earns \(6\%\). If the total interest earned in a year is \(\$560\), how much is invested in each account?

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Katrina cc
Katrina
Aaron cc
Aaron
Octabio spanish language icon
Octabio
Problem 5

The base angles in an isosceles triangle are twice as large as the third angle. Find the measure of each angle.

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Molly S. cc
Molly S.
Octabio
Octabio
Cynthia spanish language icon
Cynthia
Problem 6

A piece of string \(12\) inches long is to be formed into a rectangle. Build a table that gives the length of the rectangle if the width is \(1, 2, 3, 4,\) or \(5\) inches. Then find the area of each of the rectangles formed.

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Katrina cc
Katrina
Graham
Graham
Cynthia spanish language icon
Cynthia

4
Interval Notation and Linear Inequalities

Problem 1

Introduction Using the properties for inequalities correctly and avoiding common mistakes.

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Mr. McKeague cc
Mr. McKeague
Problem 2

Solve and graph: \(3x+3 < 2x-1\)

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Molly S. cc
Molly S.
Betsy cc
Betsy
David cc
David
David spanish language icon
David
Problem 3

Solve: \(\, -2y-3 \leq 7\)

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Mr. McKeague cc
Mr. McKeague
Molly S. cc
Molly S.
Matt cc
Matt
Julieta cc spanish language icon
Julieta
Problem 4

Solve \(\, 3(2x-4)-7x \leq -3x\)

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Molly S. cc
Molly S.
Aaron cc
Aaron
David spanish language icon
David
Problem 5

Solve and graph \(2(1-3x)+4<4x-14\)

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Stefanie cc
Stefanie
Preston cc
Preston
Edwin spanish language icon
Edwin
Problem 6

Solve \(2x-3y<6\) for \(y\).

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Katrina cc
Katrina
CJ cc
CJ
Edwin spanish language icon
Edwin
Problem 7

A company that manufactures ink cartridges finds that they can sell \(x\) cartridges each week at \(p\) dollars, according to \(x=1,300-100p\). What price should they charge if they want to sell at least \(300\) cartridges?

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Mrs. Mooney cc
Mrs. Mooney
Stefanie cc
Stefanie
Aaron cc
Aaron
Cynthia spanish language icon
Cynthia
Problem 8

The formula \(F=\dfrac{9}{5}C+32\) gives the relationship between Celsius and Fahrenheit. If the temperature on a certain day is \(86^\circ\) Fahrenheit, what is the temperature in degrees Celsius?

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Mr. McKeague cc
Mr. McKeague
Aaron cc
Aaron
Cynthia spanish language icon
Cynthia

5
Sets and Compound Inequalities

Problem 1

Give an example of an infinite set.

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Stefanie
Stefanie
Aaron
Aaron
Edwin spanish language icon
Edwin
Problem 2

Give an example of a finite set.

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Stefanie
Stefanie
Aaron
Aaron
Edwin spanish language icon
Edwin
Problem 3

Let \(A=\{1, 3, 5\}\), \(B=\{0, 2, 4\}\), and \(C=\{1, 2, 3, \ldots\}\). Find \(A\cup B\).

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Suhas
Suhas
Katrina cc
Katrina
Logan cc
Logan
Edwin spanish language icon
Edwin
Problem 4

Let \(A=\{1, 3, 5\}\), \(B=\{0, 2, 4\}\), and \(C=\{1, 2, 3, \ldots\}\). Find \(A\cap B\).

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Mr. Perez
Mr. Perez
Katrina cc
Katrina
Logan cc
Logan
Julieta cc spanish language icon
Julieta
Problem 5

Let \(A=\{1, 3, 5\}\), \(B=\{0, 2, 4\}\), and \(C=\{1, 2, 3, \ldots\}\). Find \(A\cap C\).

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Mr. Perez
Mr. Perez
Katrina cc
Katrina
Logan cc
Logan
Edwin spanish language icon
Edwin
Problem 6

Let \(A=\{1, 3, 5\}\), \(B=\{0, 2, 4\}\), and \(C=\{1, 2, 3, \ldots\}\). Find \(B\cup C\).

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Mr. Perez
Mr. Perez
Katrina cc
Katrina
Logan cc
Logan
Julieta cc spanish language icon
Julieta
Problem 7

If \(A=\{1,2,3,4,5,6\}\), find \(C=\{x \mid x\in A \text{ and } x\geq4\}\).

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Katrina
Katrina
Graham
Graham
Edwin spanish language icon
Edwin
Problem 8

Use the information in the Venn diagram to find the following sets.

  1. \(A\)

  2. \(B\)

  3. \(A\cup B\)

  4. \(A\cap B\)

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Molly S. cc
Molly S.
Logan
Logan
Cynthia spanish language icon
Cynthia
Problem 9

Graph \(\, \{x \mid x \leq -2\) or \(x>3\}\)

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Anthony cc
Anthony
Betsy cc
Betsy
David spanish language icon
David
Problem 10

Graph \(\{x \mid x\geq -5 \text{ or } x\leq 2\}\)

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Molly S. cc
Molly S.
Logan
Logan
Cynthia spanish language icon
Cynthia
Problem 11

Graph \(\, \{x \mid x > -1\) and \(x < 2\}\)

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David spanish language icon
David
Cynthia spanish language icon
Cynthia
Problem 12

Graph \(\{x \mid x > 6 \text{ and } x > -3\}\)

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Molly S. cc
Molly S.
Logan
Logan
Cynthia spanish language icon
Cynthia
Problem 13

Graph \(\{x \mid x\leq 2 \text{ and } x\geq 4\}\)

Choose instructor to watch:
Molly S. cc
Molly S.
Logan
Logan
Cynthia spanish language icon
Cynthia
Problem 14

Solve and graph: \(\, -3 \leq 2x-5 \leq 3\)

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Betsy cc
Betsy
Anthony cc
Anthony
David spanish language icon
David
Problem 15

Solve \(3t+7 \leq -4\) or \(3t+7 \geq 4\)

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Molly S. cc
Molly S.
Aaron cc
Aaron
Cynthia spanish language icon
Cynthia

6
Absolute Value Equations

Problem 1

Solve \(\lvert x \rvert =5\)

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Mr. McKeague cc
Mr. McKeague
Brooke cc
Brooke
Aaron cc
Aaron
David spanish language icon
David
Problem 2

Solve \(\lvert 2a-1 \rvert =7\)

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Mr. McKeague cc
Mr. McKeague
Molly S. cc
Molly S.
David spanish language icon
David
Problem 3

Solve \(\left\lvert \frac{2}{3}x-3 \right| +5=12\)

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Ana
Ana
Aaron cc
Aaron
David spanish language icon
David
Problem 4

Solve \(\lvert 3a-6 \rvert =-4\)

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Mr. McKeague cc
Mr. McKeague
Betsy cc
Betsy
Aaron cc
Aaron
Cynthia spanish language icon
Cynthia
Problem 5

Solve \(\lvert 3a+2 \rvert = \lvert 2a+3 \rvert\)

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Ana
Ana
Aaron cc
Aaron
David spanish language icon
David
Problem 6

Solve \(\lvert x-5 \rvert = \lvert x-7 \rvert\)

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Molly S. cc
Molly S.
Brooke cc
Brooke
Aaron cc
Aaron
David spanish language icon
David

7
Absolute Value Inequalities

Problem 1

Graph \(\lvert 2x-5 \rvert < 3\)

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Mr. McKeague cc
Mr. McKeague
Brooke cc
Brooke
Anthony cc
Anthony
Edwin spanish language icon
Edwin
Problem 2

Graph \(\lvert 3a+7 \rvert \leq 4\)

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Brooke cc
Brooke
Anthony cc
Anthony
Edwin spanish language icon
Edwin
Problem 3

Graph \(\lvert x-3 \rvert >5\)

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Mr. McKeague cc
Mr. McKeague
Anthony cc
Anthony
Brooke cc
Brooke
Julieta cc spanish language icon
Julieta
Problem 4

Graph \(\lvert 2x+3 \rvert +4 < 9\)

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Brooke cc
Brooke
Anthony cc
Anthony
Gordon spanish language icon
Gordon
Problem 5

Graph \(\lvert 4-2t \rvert > 2\)

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Molly S. cc
Molly S.
Stefanie cc
Stefanie
Aaron cc
Aaron
Julieta cc spanish language icon
Julieta
Problem 6

Solve \(\lvert 7y-1\rvert < -2\)

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Molly S. cc
Molly S.
Betsy cc
Betsy
Octabio cc
Octabio
Cynthia spanish language icon
Cynthia
Problem 7

Solve \(\lvert 6x+2 \rvert > -5\)

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Betsy cc
Betsy
Aaron cc
Aaron
Cynthia spanish language icon
Cynthia
Problem 8

Mini Lecture
Solve and graph.

  1. \(|3y+9|\geq 6\)

  2. \(|3x+5|-8<5\)

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Videos Coming Soon

8
Test & Summary

Problem 1

Solve: \[5-\frac{4}{7}a=-11\]

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Kendra cc
Kendra
Gordon cc
Gordon
Gordon spanish language icon
Gordon
Problem 2

Solve: \[\frac{1}{5}x-\frac{1}{2}-\frac{1}{10}x+\frac{2}{5}=\frac{3}{10}x+\frac{1}{2}\]

Choose instructor to watch:
Kendra cc
Kendra
Gordon cc
Gordon
Gordon spanish language icon
Gordon
Problem 3

Solve: \[5(x-1)-2(2x+3)=5x-4\]

Choose instructor to watch:
Kendra cc
Kendra
Gordon spanish language icon
Gordon
Problem 4

Solve: \[0.07-0.02(3x+1)=-0.04x+0.01\]

Choose instructor to watch:
Kendra cc
Kendra
Gordon cc
Gordon
Edwin spanish language icon
Edwin
Problem 5

Solve for \(w\): \[P=2l+2w\]

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Kendra cc
Kendra
Gordon cc
Gordon
Edwin spanish language icon
Edwin
Problem 6

Solve for \(B\): \[A=\frac{1}{2}h(b+B)\]

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Kendra cc
Kendra
Gordon cc
Gordon
Edwin spanish language icon
Edwin
Problem 7

A rectangle is twice as long as it is wide. The perimeter is \(36\) inches. Find the dimensions.

Choose instructor to watch:
Gordon cc
Gordon
Problem 8

Two angles are supplementary. If the larger angle is \(15^\circ\) more than twice the smaller angle, find the measure of each angle.

Choose instructor to watch:
Gordon cc
Gordon
Problem 9

The longest side of a right triangle is \(4\) inches more than the shortest side. The third side is \(2\) inches more than the shortest side. Find the length of each side.

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Gordon cc
Gordon
Problem 10

Graph and solve: \[-5t\leq 30\]

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Gordon cc
Gordon
Problem 11

Graph and solve: \[5-\frac{3}{2}x>-1\]

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Gordon cc
Gordon
Problem 12

Graph and solve: \[1.6x-2<0.8x+2.8\]

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Gordon cc
Gordon
Problem 13

Graph and solve: \[3(2y+4)\geq 5(y-8)\]

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Gordon cc
Gordon
Problem 14

Solve: \[\left\lvert\frac{1}{4}x-1\right\rvert=\frac{1}{2}\]

Choose instructor to watch:
Gordon cc
Gordon
Problem 15

Solve: \[\lvert3-2x\rvert +5=2\]

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Gordon cc
Gordon
Problem 16

Graph and solve: \[\lvert6x-1\rvert>7\]

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Gordon cc
Gordon
Problem 17

Graph and solve: \[\lvert3x-5\rvert-4\leq 3\]

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Joshua cc
Joshua
Lauren cc
Lauren
Gordon spanish language icon
Gordon
Problem 18

Graph and solve: \[\lvert5-4x\rvert\geq -7\]

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Gordon cc
Gordon
Kendra cc
Kendra
Problem 19

Graph and solve: \[\lvert 4t-1 \rvert<-3\]

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Kendra cc
Kendra
Gordon cc
Gordon