Algebra 1_ Fall Semester Review

• Positive correlation

• Nonlinear correlation

• Negative correlation

• No correlation

Which of the following graphs best represents a system of equations that has no solution?

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A family will travel 350 miles from their house in order to reach Dallas, TX. Which inequality can be used to find all possible values of t, the time it will take this family to reach Dallas in hours, if they travel at an average speed of at least r miles per hour?

• $t\le350r$

• $t>\frac{r}{350}$

• $t\le\frac{350}{r}$

• $t>350r^2$

• The number of hours of work it takes to earn $320

• The amount of money earned per hour

• The amount earned for 40 hours of work

• The number of hours worked per dollar earned

The perimeter of a rectangle is 42 centimeters. The length of the rectangle can be represented by (x + 4), and its width can be represented by (2x − 7). What are the dimensions of this rectangle in centimeters?

• Length = 10 and width = 11

• Length = 8 and width = 13

• Length = 6 and width = 15

• Length = 12 and width = 9

• II and IV

• I and III

• II and III

• I and IV

•  $y=200x$  

•  $y=\frac{2}{9}x$  

•  $y=\frac{110}{3}x$  

•  $y=\frac{9}{2}x$  

There are 9 books stacked on a shelf. The thickness of each book is either 1 inch or 2 inches. The height of the stack of 9 books is 14 inches. Which system of equations can be used to determine x, the number of 1-inch-thick books in the stack, and y, the number of 2-inch-thick books?

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A painter charges $35 per hour for labor plus $40 for a ladder rental when he paints a house. The customer provides the paint. The total charge to paint a customer’s house was $950. How many hours did the painter spend painting this house?

• $12\ \frac{2}{3}h$

• $28\ h$

• $23\ h$

• not here

For the function w, w(9) = −7, and w(−7) = 9. If y = w(x), what is the value of y when x = −7?