Warm up 10/9/19

3 - 5x = -9 + x

• 4
• 3
• 2
• 1

Carnival M charges an entrance fee of $5.00 and $0.65 per ticket for the rides. Carnival P charges an entrance fee of $10.00 and $0.45 per ticket for the rides. How many tickets must be purchased in order for the total cost at Carnival M and Carnival P to be the same?

• 25

• 10

• 50

• 75

The model represents an equation. What value of x makes the equation true?

• 1.75

• 2.25

• 3

• 4

Tags

CCSS.8.EE.C.7B

Which graph does NOT represent y as a function of x?

• 
• 
• 
• 

Which statement describes the mapping?

• The mapping represents y as a function of x, because each y-value corresponds to exactly one x-value.

• The mapping does not represent y as a function of x, because two of the x-values correspond to the same y-value.

• The mapping represents y as a function of x, because each x-value corresponds to exactly one y-value.

• The mapping does not represent y as a function of x, because there are more x-values than different y-values.

Tags

CCSS.8.F.A.1

Jamie used a microscope to measure the diameter of a hair. She found that the diameter of the hair was 0.000072 meter. How is this number written in scientific notation?

• 7.2 x 10^-5

• 7.2 x 10⁶

• 7.2 x 10⁵

• 7.2 x 10^-6

Tags

CCSS.8.EE.A.3

The mass of a textbook is approximately 0.00165 metric ton. How is this number written in scientific notation?

• 165 x 10^-5

• 1.65 x 10^-3

• 16.5 x 10^-4

• 0.165 x 10^-2

Tags

CCSS.8.EE.A.3

Jerry has a new job and earns a salary of $45,000. Victoria has a new job and earns a salary of $54,000. Jerry will receive a salary increase of $2,500 per year, and Victoria will receive a salary increase of $1,500 per year. Which equation can be used to find x, the number of years it will take Jerry to earn the same salary as Victoria?

• 45,000x + 2,500x = 54,000x + 1,500x

• 45,000x + 2,500 = 54,000x + 1,500

• 45,000 + 2,500x = 54,000 + 1,500x

• 45,000x + 2,500x = 54,000x + 1,500

Veronica is ordering trophies for her school. Company P charges $3.50 for each trophy and a one-time engraving fee of $25. Company R charges $7.50 for each trophy and a one-time engraving fee of $17. Which inequality can be used to find x, the minimum number of trophies that can be ordered so that the total charge at Company P is less than the total charge at Company R?

• 3.5 + 25x < 7.5 + 17x

• 3.5 + 25x > 7.5 + 17x

• 3.5x + 25 < 7.5x + 17

• 3.5x + 25 > 7.5x + 17

Tags

CCSS.7.EE.B.4B