M1 Check-In 2 Review

George weighs 60 pounds less than his older brother. Together they weigh 240 pounds. How many pounds does George’s older brother weigh?

A system of equations is shown below.

–5x + 2y = 9

y = 7x

What is the solution to the system?

• (1,5)

• (1,7)

• (5,1)

• (7,1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

A system of equations is shown below.

2x – 5y = 8

y = 2x + 2

What is the value of x in the system?

• -1.5

• -2.25

• -2.5

• -4.25

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

A system of equations is shown below.

9x + 5y = 8

3x – y = 4

What is the y-value of the solution to the system?

• -2

• $-\frac{1}{2}$

• 2

• $\frac{5}{2}$

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Kathryn babysits for extra money. She uses the function f(x) = 10x + 18 to calculate her earnings each day, where x represents the number of children she babysits. What is the domain of the function?

• all integers

• all positive integers

• {18, 28, 38, . . .}

• {28, 38, 48, . . .}

The amount Harry is paid each day, f(x), is a function of the number of hours, x, he works. The function f(x) = 10x + 25 models this situation. Harry can work, at most, 4 hours each day. What is the best domain of the function in this context?

• 0 ≤ x ≤ 65

• 0 ≤ f(x) ≤ 65

• 0 ≤ x ≤ 4

• 0 ≤ f(x) ≤ 4

What is the larger zero of the function $f(x)=8x^2+6x–35$  ?

• -2.5

• -1.75

•  $\frac{3}{8}$  

• 1.75

Tags

CCSS.HSA-SSE.B.3B

CCSS.HSF-IF.C.8A

Jonathan is saving money for a vacation. He puts $200 into an account earning 0.4% interest each month and saves a total of $250 at home in his piggy bank. Which expression below represents the total amount he has saved in m months?

• $450(1.004)^{m\ \ }$

• $450(1.04)^{m\ \ }$

• $200(1.004)^m+250\$

• $200(1.04)^m+250m\$

• $4

• $5

• $9

• $13

Tags

CCSS.8.F.A.2

CCSS.HSF.IF.C.9

• Marco’s account is increasing by 2% each year.

• Marco’s account is increasing by 102% each year.

• Marco’s account is increasing by $2.00 each year.

• Marco’s account is increasing by $102.00 each year.

Tags

CCSS.HSF-IF.C.8B