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Intermediate Algebra

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$\def\Va{\frac{4}{3}}\def\VPlusa{+\frac{4}{3}}\def\VMinusa{-\frac{4}{3}}\def\Vb{\frac{1}{3}}\def\VPlusb{+\frac{1}{3}}\def\VMinusb{-\frac{1}{3}}$

Determine whether $a=\frac{4}{3}$ and $b=\frac{1}{3}$ are solutions to the following equation $$3\left(3x-1\right)=6x-2$$


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$\def\VqSubOneSub{2}\def\VPlusqSubOneSub{+2}\def\VMinusqSubOneSub{-2}\def\VqSubTwoSub{-6}\def\VPlusqSubTwoSub{-6}\def\VMinusqSubTwoSub{+6}\def\VqSubFourSub{7}\def\VPlusqSubFourSub{+7}\def\VMinusqSubFourSub{-7}\def\VqSubFiveSub{6}\def\VPlusqSubFiveSub{+6}\def\VMinusqSubFiveSub{-6}\def\Vp{-6}\def\VPlusp{-6}\def\VMinusp{+6}\def\Vj{-3}\def\VPlusj{-3}\def\VMinusj{+3}\def\Vh{18}\def\VPlush{+18}\def\VMinush{-18}\def\VqSubThreeSub{-36}\def\VPlusqSubThreeSub{-36}\def\VMinusqSubThreeSub{+36}$

Solve the following linear equation$$\VqSubOneSub (d\VPlusqSubTwoSub )-(d\VPlusqSubThreeSub )=\VqSubFourSub (d\VPlusqSubFiveSub )$$


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$\def\Va{6}\def\VPlusa{+6}\def\VMinusa{-6}\def\Vb{8}\def\VPlusb{+8}\def\VMinusb{-8}\def\VnSubOneSub{2}\def\VPlusnSubOneSub{+2}\def\VMinusnSubOneSub{-2}\def\VnSubTwoSub{22}\def\VPlusnSubTwoSub{+22}\def\VMinusnSubTwoSub{-22}\def\Vc{24}\def\VPlusc{+24}\def\VMinusc{-24}$

One number is $\Va $ more than $\Vb $ times another. Their sum is $\Vc $. Find the two numbers. Assume $n$ is the first number.


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Without graphing, determine the number of solutions and then classify the two-variable system of linear equations $\begin{cases} {y=2x+3}&{\,}\\ {4x-2y=8\,}&{\,}\\ \end{cases}$


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$\def\Va{27}\def\VPlusa{+27}\def\VMinusa{-27}\def\Vc{800}\def\VPlusc{+800}\def\VMinusc{-800}\def\Vb{2125}\def\VPlusb{+2125}\def\VMinusb{-2125}\def\Vs{\frac{325}{3}}\def\VPluss{+\frac{325}{3}}\def\VMinuss{-\frac{325}{3}}$

Caleb has a pet sitting business. He charges $\$\Va /\uhr$. His monthly expenses are $\$\Vb $. How many full hours $n$ does he have to work in order to have a profit of at least $\$\Vc $?


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Henry is mixing pistachios and almonds to make $12.5$ pounds of trail mix. Pistachios cost $\$16$ per pound and almonds cost $\$6$ per pound. How many pounds $x$ of pistachios and how many pounds of almonds should Henry use for the trail mix to cost $\$10$ per pound?


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$\def\Va{20}\def\VPlusa{+20}\def\VMinusa{-20}\def\Vc{101}\def\VPlusc{+101}\def\VMinusc{-101}$

Lily has an assignment to design a traffic cone, the dimensions of which are shown in the figure below. Given that $a=20\,\ucm\,\text{and}\,c=101\ucm$, use Pythagorean Theorem to find the height of the traffic cone $b$ in$\ucm$.



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Matt drove two hours from Austin towards Houston and stopped at a gas station to fill his tank. At the gas station, he met Neal, who had driven three hours from Houston towards Austin. The distance between Austin and Houston is $162\,\umi$, and Matt's speed was nine miles per hour faster than Neal's speed. Find the speed of the two truckers.

Let $s$ be Neal's speed.


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$\def\Vx{4}\def\VPlusx{+4}\def\VMinusx{-4}$

Determine the $x$-intercept for this linear equation

 


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$\def\Vh{0}\def\VPlush{+0}\def\VMinush{-0}\def\Vk{-1}\def\VPlusk{-1}\def\VMinusk{+1}$

Find the slope-intercept equation of the line with slope $-3$ and $y$-intercept $\left(0,-1\right)$. Assume the equation of the line is $y=mx+b$.


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Find the slope-intercept equation of the line shown below, using the given information. Assume the equation of the line is $y=mx+b$.

 

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$\def\Vh{65}\def\VPlush{+65}\def\VMinush{-65}\def\Vb{175}\def\VPlusb{+175}\def\VMinusb{-175}\def\Vg{2}\def\VPlusg{+2}\def\VMinusg{-2}\def\Vd{3}\def\VPlusd{+3}\def\VMinusd{-3}\def\Ve{10}\def\VPluse{+10}\def\VMinuse{-10}\def\Vf{5}\def\VPlusf{+5}\def\VMinusf{-5}\def\Vi{4}\def\VPlusi{+4}\def\VMinusi{-4}\def\Vj{2}\def\VPlusj{+2}\def\VMinusj{-2}\def\VC{ic+ja}\def\VPlusC{+ic+ja}\def\VMinusC{-ic+ja}$

Anna and her family want to go to this year's fair. She heard from a group that it cost $\$\Vh $ for $\Vg $ children and $\Vd $ adults. Her mother also heard from another group that it cost $\$\Vb $ for $\Ve $ children and $\Vf $ adults. If her family has $\Vi $ children and $\Vj $ adults (including her), how much will their tickets cost.

Use $c$  for the cost of children ticket and $a$ for the cost of adult ticket.


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$\def\Va{1}\def\VPlusa{+1}\def\VMinusa{-1}\def\Vb{3}\def\VPlusb{+3}\def\VMinusb{-3}\def\Vc{7}\def\VPlusc{+7}\def\VMinusc{-7}\def\VA{4}\def\VPlusA{+4}\def\VMinusA{-4}\def\VB{-2}\def\VPlusB{-2}\def\VMinusB{+2}\def\VC{0}\def\VPlusC{+0}\def\VMinusC{-0}$

Solve the following system of equations by substitution
\begin{lalign*} &{\left(1\right)\,x+3y=7}\\ &{\left(2\right)\,4x-2y=0}\\ \end{lalign*}


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$\def\Vq{7}\def\VPlusq{+7}\def\VMinusq{-7}\def\Va{2}\def\VPlusa{+2}\def\VMinusa{-2}\def\Vb{2}\def\VPlusb{+2}\def\VMinusb{-2}\def\Vn{12.0}\def\VPlusn{+12.0}\def\VMinusn{-12.0}\def\Vv{2.35}\def\VPlusv{+2.35}\def\VMinusv{-2.35}$

Priam has a collection of nickels and quarters, with a total value of $\$\Vv $. The number of nickels $n$ is $\Vb $ less than $\Va $ times the number of quarters $q$. How many nickels and how many quarters does he have?


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$\def\Vy{-\left(x-2\right)\left(x+2\right)}\def\VPlusy{-\left(x-2\right)\left(x+2\right)}\def\VMinusy{+\left(x-2\right)\left(x+2\right)}$

The tiles in this model represent a quadratic expression $y$. Determine the factored form. Red is positive and blue is negative.

 


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$\def\Va{2}\def\VPlusa{+2}\def\VMinusa{-2}\def\Vb{-4}\def\VPlusb{-4}\def\VMinusb{+4}\def\Vc{5}\def\VPlusc{+5}\def\VMinusc{-5}\def\Vd{-1}\def\VPlusd{-1}\def\VMinusd{+1}\def\VA{10}\def\VPlusA{+10}\def\VMinusA{-10}\def\VB{-22}\def\VPlusB{-22}\def\VMinusB{+22}\def\VC{4}\def\VPlusC{+4}\def\VMinusC{-4}$

Factor using the "$ac$" method$$\VA x^{2}\VPlusB x\VPlusC $$


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$\def\Va{5}\def\VPlusa{+5}\def\VMinusa{-5}\def\Vb{9}\def\VPlusb{+9}\def\VMinusb{-9}\def\VA{25}\def\VPlusA{+25}\def\VMinusA{-25}\def\VB{90}\def\VPlusB{+90}\def\VMinusB{-90}\def\VC{81}\def\VPlusC{+81}\def\VMinusC{-81}$

Factor

$$\VA w^{2}\VPlusB wu\VPlusC u^{2}$$


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$\def\VA{\left(6x-7\right)\left(2x+3\right)}\def\VPlusA{+\left(6x-7\right)\left(2x+3\right)}\def\VMinusA{-\left(6x-7\right)\left(2x+3\right)}\def\Vl{6x-7}\def\VPlusl{+6x-7}\def\VMinusl{-6x-7}\def\Vw{2x+3}\def\VPlusw{+2x+3}\def\VMinusw{-2x+3}$

Given a rectangle with the area $A\,=\,12x^{2}+4x-21$, determine the dimensions$\,l,w$ of the rectangle where $l>w$ for large enough $x$ values.


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A table's shape is a right triangle. The length of one side is $1$ foot less than the other side. The hypotenuse is $5$. Find the lengths of the two sides of the table.

Let $x$ be the length of the longer side.


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Add and simlify$$\frac{7}{3xy+y^{2}}+\frac{4}{9x^{2}-y^{2}}\,$$


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Solve the following rational equation for $x$.
$$1+\frac{4}{x}=\frac{5}{x^{2}}$$


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$\def\VSSubOneSub{45\uin^{2}}\def\VPlusSSubOneSub{+45\uin^{2}}\def\VMinusSSubOneSub{-45\uin^{2}}\def\VSSubTwoSub{90\uin^{2}}\def\VPlusSSubTwoSub{+90\uin^{2}}\def\VMinusSSubTwoSub{-90\uin^{2}}$

Given that the two solids below are similar, what is the height, $h$, of the smaller solid to two decimal places?


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$\def\Va{6}\def\VPlusa{+6}\def\VMinusa{-6}\def\Vb{4}\def\VPlusb{+4}\def\VMinusb{-4}\def\Vc{4096}\def\VPlusc{+4096}\def\VMinusc{-4096}\def\Vq{3}\def\VPlusq{+3}\def\VMinusq{-3}\def\Vp{7}\def\VPlusp{+7}\def\VMinusp{-7}\def\Vd{18}\def\VPlusd{+18}\def\VMinusd{-18}\def\Vf{42}\def\VPlusf{+42}\def\VMinusf{-42}$

Simplify $${\sqrt[\Va ]{\frac{\Vc x^{\Vd }}{y^{\Vf }}}}$$


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$\def\VxSubOneSub{-3}\def\VPlusxSubOneSub{-3}\def\VMinusxSubOneSub{+3}\def\VySubOneSub{-4}\def\VPlusySubOneSub{-4}\def\VMinusySubOneSub{+4}\def\VxSubTwoSub{2}\def\VPlusxSubTwoSub{+2}\def\VMinusxSubTwoSub{-2}\def\VySubTwoSub{2.25}\def\VPlusySubTwoSub{+2.25}\def\VMinusySubTwoSub{-2.25}\def\Vy{a\left(x-x_{1}\right)^{2}+y_{1}}\def\VPlusy{+a\left(x-x_{1}\right)^{2}+y_{1}}\def\VMinusy{-a\left(x-x_{1}\right)^{2}+y_{1}}$

Determine the equation of the quadratic function given its vertex $\left(\VxSubOneSub ,\VySubOneSub \right)$ and a point on the parabola  $\left(\VxSubTwoSub ,\VySubTwoSub \right)$


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$\def\Vw{\frac{100-3L}{2}}\def\VPlusw{+\frac{100-3L}{2}}\def\VMinusw{-\frac{100-3L}{2}}\def\VAL{L\cdot w}\def\VPlusAL{+L\cdot w}\def\VMinusAL{-L\cdot w}\def\Vh{-\frac{50}{2\left(-\frac{3}{2}\right)}}\def\VPlush{-\frac{50}{2\left(-\frac{3}{2}\right)}}\def\VMinush{+\frac{50}{2\left(-\frac{3}{2}\right)}}\def\Vk{A\left(h\right)}\def\VPlusk{+A\left(h\right)}\def\VMinusk{-A\left(h\right)}$

A rancher wants to construct a rectangular fence with a partition. He buys $100\um$ of fencing to create the fence and partition.

 

  1. Find a formula for the area enclosed by the fence.
  2. What is the length $L$ that will give the rancher the most area?
  3. What is the maximum area?

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