The equation $40x+20y=160$ represents the number of sweaters, $x$, and number of shirts, $y$, that Yesenia purchased for $160. If Yesenia purchased 2 sweaters, how many shirts did she purchase?

Cathy has $n$ CDs. Gerry has 3 more than twice the number of CDs that Cathy has. In terms of $n$, how many CDs does Gerry have?

An artist paints and sells square tiles. The selling price $P$, in dollars, of a painted tile is a linear function of the side length of the tile $s$, in inches, as shown in the table below.

Which of the following could define the relationship between $s$ and $P$?

If $5(x+4)=4(x+4)+29$, what is the value of $x+4$

The triangle inequality theorem states that the sum of any two sides of a triangle must be greater than the length of the third side. If a triangle has side lengths of $\mathbf{6}$ and $12$, which inequality represents the possible lengths, $x$, of the third side of the triangle?

In the $xy$-plane, a line has a slope of 6 and passes through the point $(0,8)$. Which of the following is an equation of this line?

For the function $f$, the graph of $y=f(x)$ in the $xy$-plane has a slope of $3$ and passes through the point $(0,-8)$. Which equation defines $f$?

One gallon of paint will cover 220 square feet of a surface. A room has a total wall area of $w$ square feet. Which equation represents the total amount of paint $P$, in gallons, needed to paint the walls of the room twice?

A gardener buys two kinds of fertilizer. Fertilizer A contains 60% filler materials by weight and Fertilizer B contains 40% filler materials by weight. Together, the fertilizers bought by the gardener contain a total of 240 pounds of filler materials. Which equation models this relationship, where $x$ is the number of pounds of Fertilizer A and $y$ is the number of pounds of Fertilizer B?

In the $xy$-plane, the points $(-2,3)$ and $(4,-5)$ lie on the graph of which of the following linear functions?

Some values of the linear function $f$ are shown in the table above. What is the value of $f(3)$?

Oil and gas production in a certain area dropped from 4 million barrels in 2000 to 1.9 million barrels in 2013. Assuming that the oil and gas production decreased at a constant rate, which of the following linear functions $f$ best models the production, in millions of barrels, $t$ years after the year 2000?

$y=4x-9$

$y=19$

What is the solution $(x,y)$ to the given system of equations?

For the linear function $f$, the table shows three values of $x$ and their corresponding values of $f(x)$. Function $f$ is defined by $f(x)=ax+b$, where $a$ and $b$ are constants. What is the value of $a-b$?

For a training program, Juan rides his bike at an average rate of 5.7 minutes per mile. Which function $m$ models the number of minutes it will take Juan to ride $x$ miles at this rate?

$10=2x+4$

How many solutions exist to the equation shown above?

$4x+3y=24$

Mario purchased 4 binders that cost $x$ dollars each and 3 notebooks that cost $y$ dollars each. If the given equation represents this situation, which of the following is the best interpretation of 24 in this context?

A psychologist set up an experiment to study the tendency of a person to select the first item when presented with a series of items. In the experiment, 300 people were presented with a set of five pictures arranged in random order. Each person was asked to choose the most appealing picture. Of the first 150 participants, 36 chose the first picture in the set. Among the remaining 150 participants, $p$ people chose the first picture in the set. If more than 20% of all participants chose the first picture in the set, which of the following inequalities best describes the possible values of $p$ ?

The graph of $7x+2y=-31$ in the $xy$-plane has an $x$-intercept at $(a,0)$ and a $y$-intercept at $(0,b)$, where $a$ and $b$ are constants. What is the value of $ \frac{b}{a} $?

For the linear function $f$, the table shows three values of $x$ and their corresponding values of $f(x)$. Which equation defines $f(x)$?

$y=-4x+40$

Which table gives three values of $x$ and their corresponding values of $y$ for the given equation?

The function $h$ is defined by $h(x)=3x-7$. What is the value of $h(-2)$?

$H=120p+60$

The Karvonen formula above shows the relationship between Alice's target heart rate $H$, in beats per minute (bpm), and the intensity level $p$ of different activities. When $p=0$, Alice has a resting heart rate. When $p=1$, Alice has her maximum heart rate. It is recommended that $p$ be between 0.5 and 0.85 for Alice when she trains. Which of the following inequalities describes Alice's target training heart rate?

$\bm{4x+6=18}$

Which equation has the same solution as the given equation?

$a(3-x)-b=-1-2x$

In the equation above, $a$ and $b$ are constants. If the equation has infinitely many solutions, what are the values of $a$ and $b$?