STAAR Review #3

If y varies directly as x, and x = 9 when y = 15, find y when x = 33.

• 55

• 19.8

• 36

• 2

Is (0,0) in the the solution set of -4x < 6y -54

• Yes, because 0 is less than or equal to 54

• No because 0 is not less than or equal to -54

• Yes because 0 is less than or equal to -54

• No because 0 is not less than or equal to 54

What is the slope of the line that passes through the points (5, -11) and (-9, 17)

• -½

• 7

• 2

• -2

What value of x makes the equation true?

.75(x+20)=2 + 0.5 (x-2)

• -64

• 64

• 56

• -56

What is the range of the parabola shown by the equation: f(x)=-x²-2x+3?

• X < 4

• X > -4

• Y < 4

• Y > -4

The amount of fertilizer in a landscaping company’s warehouse decreases at a rate of 3% per week. The amount of fertilizer in the warehouse was originally 78,000 cubic yards. Which function models the amount of fertilizer in cubic yards left after w weeks?

• f(w)=78,000(.03)^w

• f(w)=78,000(.97)^w

• f(w)=1.03(78,0000)^w

• f(w)=78,000(1.03)^w

The admission fee at a small fair is $1.50 for children and $4.00 for adults. On a certain day, 2200 people enter the fair and $5050 is collected. Write the system of equations for this scenario if a is the number of adults and c is the number of children.

• 1.50c + 4.00a = 5050

  c + a = 2200

• 4c + 1.50a = 5050

  C + a = 2200

• 1.50c + 4.00a = 2200

  C + a = 5050

• 4.00c + 1.50 a = 2200

  C + a = 5050

A paper airplane was thrown from the top of a tall building. The equation y=60-1.5x represents the height of the paper airplane x seconds since it has been thrown. How long did it take the paper airplane to reach the ground?

• 60 seconds

• 20 seconds

• 40 seconds

• 1.5 seconds

Find the slope

• 4/5
• 5/4
• -5/4
• -4/5

Tags

CCSS.8.EE.B.5

Find the slope of the line.

• 1/2
• -1/2
• 2/1
• -2/1

Tags

CCSS.8.EE.B.5