8th Math - Week 18

Which table represents a non-proportional relationship between x and y?

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Tags

CCSS.7.RP.A.2A

A college has two classrooms of students.

Classroom A had 70 students.

Classroom B had 30 students.

Classroom A sent groups of 4 students to Classroom B until both classrooms had the

same number of students.

The equation shown can be used to find the number of groups that Classroom A sent to Classroom B so each classroom had the same number of students.

70 − 4x = 30 + 4x

How many groups did Classroom A send to Classroom B?

A water tank currently contains 275 gallons of water. The amount of water in the tank will decrease at a constant rate of 15 gallons per week.

Which function can be used to find t, the total number of gallons of water in the tank after w weeks?

• t=15w−275

• t=−15w+275

• t=275w−15

• t=−275w+15

Tags

CCSS.HSF-BF.A.1A

The scatterplot shows the height in centimeters and weight in kilograms of several students.

Based on the scatterplot, which is the best prediction of the height in centimeters of a student with a weight of 64 kilograms?

• 152cm

• 160cm

• 162cm

• 156cm

A teacher bought markers at a cost of $3 per set. The teacher had a $2-off coupon to use toward the total cost of the markers bought.

Which table shows the relationship between x, the number of sets of markers bought by the teacher, and y, the total cost of the markers?

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Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

The diameter of a cylinder is 2.5 inches, and the height is 7.5 inches. Which equation can be used to find V, the volume of the cylinder in cubic inches?

Tags

CCSS.8.G.C.9

CCSS.HSG.GMD.A.3

Triangle KLM and triangle PRS are similar right triangles.

Which proportion can be used to show that the slope of KM is equal to the slope of PS?

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Tags

CCSS.8.EE.B.6

The table shows the diagonal lengths of TV screens at a store.

Which TV screen has the smallest diagonal length in feet?

• W

• X

• Y

• Z

Tags

CCSS.7.NS.A.2D

CCSS.8.NS.A.1

A math teacher observed that as the number of hours students studied their multiplication facts increased, the number of errors the students made on their multiplication tests decreased. Which scatterplot could support this teacher’s observation?

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Tags

CCSS.8.SP.A.1

The diagram shows the height of a cone that holds ice cream. The cone has a volume of 1.5π cubic inches.

Which measurement is closest to the radius of the cone in inches?

• 0.6 in.

• 1.4 in.

• 1.0 in.

• 0.5 in

Tags

CCSS.8.G.C.9

CCSS.HSG.GMD.A.3