Math semester test

Which numerical expression represents eighteen less than the quotient of twenty and 13.8

20/13.8-18

Which number expressions represents twenty less than the quotient of eighteen and 13.8

A. 18/ 13.8 - 20

What is the value of 2^4+ 1/4 |9x + 2| when x = -2

A. 20

LaVant is making a playlist for an upcoming trip. The average length of a song on his digital music player is 3 minutes and 56 seconds. If he expects the flight to last about 2.5 hours, how many songs should LaVant put on the playlist

A. 40

Which equation represents the sentence? The sum of five times a number and seven is equal to twelve

A. 5n + 7 = 12

Marisol wants to determine whether the difference n of the irrational number ✅2and the rational number 1/2 is rational or irrational. Her work is shown {has a big chat on the question}

A. Case 1 fails because ✅2 is irrational. So, n must be an irrational number. The difference of an irrational number and a rational number is an irrational number

The graph of a function is shown. Use the graph to describe the line symmetry, if any, of the function {there is a graph on this} with a squiggly line

A. No line of symmetry

Which property can be used to show that 3a= 3a

A. Reflexive property of equality

Select all of the verbal expressions that represents 7/4 +2(8)

A. Seven divided by four plus two times eight, d. The quotient of seven and four increased by the product of two and eight

Select all of the verbal expressions that represent 10/3+4(9)

A. The quotient of ten and three increased by the product of four and nine, B. ten divided by three plus four times nine, E. ten divided by three plus the product of four and nine

Select all of the verbal expression that represents 10/3- 4(9)

A. The quotient of ten increased by the product of four and nine C. The product of ten and three added to the quotient of four and nine

Which sentence represents the equation? 3x + 4= 10

A. The sum of three times x and four equals ten

Solve the equation 2x+ 12/ 5= 4y for x

A. X= 10y-6

You can approximate the distance to a lightning strike by counting the seconds between the flash of lightning and the second of thunder. This table shows the relationship. between TIME and DISTANCE. (Table and the main words are time and distance)

A. d= 1/5t

Solve 3 |y+ 6|= 30

A. {-16, 4}

The average test score in a class is 78%. Half of the class scored within 8 points of the average. One student received a score of x%. Which shows an expression that could be used to determine how far the student's score is from average?

A. |x- 78|

Which could be an equation for the group shown? (Number line)

A. |x-2| = 5

Select all of th expressions that could be used to evaluate

A.3(14) + 1/2(14), C. 3 1/2(10) + 3 1/2(4), D. (3 1/2)(20 - 4)

What is the domain of the relation shown in the graph? {there is a graph with dots}

B. (-3, -1, 1, 5)

Solve x+15/= 2/5

B. -11

For f(x)= -2x=7, find the value of f(-1)+f (4)

B. 8

Solve 21 = 3p - 6

B. 9

Which property can be used to show that if 3a = 4b, then 4b = 3a

B. Symmetric property

Which describes the scale on the x- and y- axes that is the most appropriate for the graph of (25, 10), (50, 15), (-37.5, -20), (125, 25), and (75, 30)

B. The x- axis hound extend from -50 to 150 with a scale of 25. The y-axis should extend from -30 to 30 with a scale of 10.

Use the graph to estimate the x- and y- intercepts of this function and describe where the function is positive and negative

B. X-intercepts: (2,0), (3,0), (-2, 0) Y-intercepts: (0, 12); Positive: when -2 < x < 2 and when x > 3; Negative: when x < -2 and when 2 < x < 3

The graph of 4x- y= -5 is shown. Does 4x- y= -5 represent a function? Explain your reasoning.

B. Yes; for each element of the domain, there is only one element of the range.

Select all of the points that are relative minima of the function shown, (With a graph)

B. b, D. d

Which expression(s) are equivalent to |9- x|

B. |9| + |x| if x <_ 0, E. |x| - |9| if x > 9

A care leaves Seattle traveling at a speed of 50 miles per hour. Two hours later, a second car leaves Seattle traveling at a speed of 60 miles per hour. The cars' distances from Seattle at time t hours are shown in the table After how much time t will the two cars be the same distance from Seattle?

C. 12 hours

Which equation represents this sentence? Four times the sum of a number x and a number y is equal to 20

C. 4(x+ y)= 20

Which expression in equivalent to (6x^2- 9x- 24)2/3

C. 4x^2- 6x- 16

Which expression is equivalent to (6x^2-9x-24) 2/3

C. 4x^2-6x-16

Solve 4(x+ 9) = 6x- 4

D. 20

Which expression is equivalent to (5x^2- 10x- 25) 3/5

D. 3x^2- 6x- 15

Which proportions can be used to find the height of a standard television screen with a width of 15 inches

H/15 = 3/4, 15/h = 4/3, 4/15 = 3/h