# A Review Of What We Have Done So Far!: Question Preview (ID: 22688)

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**5x - 8 = 7**

a) x = 3

b) x = 2

c) x = -3

d) x = 9

**-2(4x - 5) + 6x - 4 = -5(x + 7)**

a) x = 49/9

b) x = -41/3

c) x = 16/3

d) x = -26/3

**solve this system. x + y = 3 2x - y = 9**

a) x = 4.5, y = -1.5

b) x = 4, y = -1

c) x = -1, y = 4

d) x = 1, y = 3

**Which of the following is NOT true about rate of change?**

a) Rate of change tells us how steep the line will be.

b) A constant rate of change always goes with a linear function.

c) Rate of change measures change in y over change in x.

d) Rate of change does not mean the same thing as slope, because R.o.C. is done on a table and slope is done on a graph.

**In a triangle, one interior angle measures 15 degrees and another measures 47 degrees. What is the measure of the third angle?**

a) 28 degrees

b) 180 degrees

c) 118 degrees

d) 128 degrees

**In a right triangle, the hypotenuse has a value of 30 inches and the base has a value of 7 inches. How tall is the triangle?**

a) about 29.1 inches tall

b) about 30.80 inches tall

c) about 29.2 inches tall

d) about 30.81 inches tall

**Two lines cross each other, creating 4 angles. One of the angles measures 28 degrees. What do the other 3 angles measure?**

a) 28 degrees, 152 degrees, 152 degrees

b) 28 degrees, 62 degrees, 62 degrees

c) 28 degrees, 28 degrees, 62 degrees

d) 28 degrees, 28 degrees, 152 degrees

**Which of the following sets of numbers could be the dimensions of a right triangle?**

a) a = 12, b = 16, c = 20

b) a = 2, b = 3, c = 5

c) a = 10, b = 13, c = 38

d) a = 2, b = 4, c = 6

**In a right triangle, the base = 8cm and the height = 10 cm. What is the value of the hypotenuse?**

a) 6 cm

b) about 12.80 cm

c) 13 cm

d) about 12.81 cm

**What does an r-value of -0.9954 mean about the data set?**

a) You have a very strong positive correlation.

b) You have a very strong negative correlation.

c) Correlation is so strong that you can also assume causation.

d) Being a negative number means the trend line is a bad fit for the data.

**Which of these function rules is a direct variation?**

a) y = x + 5

b) y = 2x - 7

c) y = -3x

d) y = 18 / x

**y = 0.99x - 2, where x is the number of MP3 files purchased and y is the final cost of your purchase. Which of these is NOT a possible meaning for the y-intercept?**

a) You start at -2 MP3's.

b) Your online account had a $2 credit in it, so you will get to take off that $2 from today's purchase.

c) You have an online coupon code that will give you $2 your total purchase.

d) The website is giving new customers a $2 savings on your first purchase for setting up an account.

**y = 0.99x - 2, where x is the number of MP3 files purchased and y is the final cost of your purchase. What does the slope tell you about the problem?**

a) You only get 0.99 of an MP3 each time.

b) You have to buy more than 2 MP3's.

c) You spend $0.99 on MP3's.

d) You spend $0.99 more for every 1 MP3 you buy.

**In the function rule y = 4x - 6, what does the slope tell me to do?**

a) Go down 6 spaces, over 1 space right.

b) Go up 1 space, over 4 spaces right.

c) Go up 4 spaces, over 1 space right.

d) Go down one space, over 6 spaces right.

**The slope measures.....**

a) The change in time compared to change in height.

b) The steepness and direction of a line.

c) The pattern in the y-column of a table.

d) Where a linear function starts on a graph.

**To calculate the slope you would find...**

a) the change in y values divided by the change in x values.

b) the change in x values divided by the change in y values.

c) what you add to each x to get each y.

d) what you would multiply to each x to get each y.

**If -x is greater than 5, then**

a) x is less than 5

b) x is less than -5

c) x is greater than -5

d) x is greater than 5

**Candy canes cost $1.50 each to buy, and chocolate moose munch bags cost $3.50 each. You have no more than $10 to spend. Which of these is NOT a possible solution?**

a) 2 candy canes, 2 bags of moose munch.

b) 8 candy canes, 2 bags of moose munch

c) 3 candy canes, 1 bag of moose munch

d) 6 candy canes, 4 bags of moose munch

**Two angles are complementary. One of the angles is 40 degrees. What is the other angle?**

a) 50 degrees

b) 40 degrees

c) 140 degrees

d) 320 degrees

**Two angles are supplementary. One of the angles is 57 degrees. What is the other angle?**

a) 57 degrees

b) 33 degrees

c) 123 degrees

d) 303 degrees

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