Spiral Review #2

A ball was launched into the air, and its height above the ground was recorded each second, as shown in the table.

Based on the data, which statement is a valid conclusion?

• The ball lands on the ground at 4 seconds.

• The ball reaches a maximum height of 11 feet.

• The ball was launched from a height of 0 feet.

• The ball reaches its maximum height at 2 seconds.

Answer explanation

vertex @ 2 seconds

On an island, a rare breed of rabbit doubled its population each month for two years.

Which type of function best models the increase in population at the end of two years?

• linear growth

• linear decay

• exponential growth

• exponential decay

Answer explanation

Key Word: DOUBLED

means exponential growth

Lidnsey can run 400 meters in 43.03 seconds.

Which calculation would determine her average speed, in miles per hour?

**Hint: units in numerator must cancel with units in denominator

• (1)

• (2)

• (3)

• (4)

Answer explanation

Tags

CCSS.6.RP.A.3D

• 2(3x - 1)(3x + 1)

• (3x - 1)(6x + 2)

Answer explanation

Tags

CCSS.HSA.APR.C.4

• d = 3

• d = 2.4

• d = 4

• d = 2

Answer explanation

Tags

CCSS.HSF.BF.A.2

Determine the 21st term of this sequence.

**Hint: use the Arithmetic Sequence formula on the reference sheet!*

• 54

• 89

• 45

• 65

Answer explanation

Tags

CCSS.HSF.BF.A.2

Graph the system of inequalities on the set of axes.

3y + 2x ≤ 15

y - x > 1

Which of the following coordinates is a point in the solution to this system?

**Hint: solve for y in both inequalities first!

• (0, 0)

• (5, 5)

• (-3, 1)

• (-3,-5)

Answer explanation

Check your graph!! :)

Tags

CCSS.HSA.REI.D.12

Lydia wants to take art classes. She compares the cost at two art centers. Center A charges $25 per hour and a regristration fee of $25. Center B charges $15 per hour and a regristration fee of $75. Lydia plans to take x hours of classes.

Which equation represents the total cost of Center A?

• A = 15x + 25

• A = 25x + 75

• A = 25x + 25

• A = 15x + 75

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

Which equation represents the total cost of Center B?

• B = 25x + 25

• B = 15x + 75

• B = 15x + 25

• B = 25x + 75

Tags

CCSS.8.EE.B.5

If Lydia wants to take 10 hours of classes, which center will cost less?

**Hint: 10 hours means that x=10

• Center A

• Center B

Tags

CCSS.8.EE.B.5