Grade 8 Math 2012 Answer Key.notebook - Sandra...

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Grade 8 Math 2012 Answer Key.notebook June 07, 2016

Section 1 – Selected Response: Shade the appropriate bubble on the bubble sheet. 1. Which list represents the factors of a perfect square number?

A) 1, 2, 4, 8, 16B) 1, 2, 7, 14C) 1, 2, 3, 4, 6, 12D) 1, 2, 3, 6, 9, 18

Grade 8 Math Final Exam 2012 Answer Key

odd # of factors, 16 is a perfect square

1. The area of a square is 144 . What is the perimeter of thesquare, in m?

A) 12B) 48C) 72D) 288

Calculate:

B)C) 12D) 32

()()=(+)

(4)(8)=32

Calculate:

B)C) 7D) 8

Calculate:

BEDMAS

Solve:

What relationship is indicated in the graph?

A) As increases by 1, decreases by 6

B) As increases by 1, decreases by 2

C) As increases by 1, increases by 2

D) As increases by 1, increases by 4

as x increases/decreases by...y increases/decreases by...

Merlin exercises for hours each day of the week except Sunday. How many hours does he exercise in one week?

Cross Reduce

Change mixed # to improper fraction

It takes scoops of flour to make one cake. How many cakes do32 scoops of flour make?

1Multiply by the reciprocal

Section 1 ‐ Constructed Response: Answers are to be done in the spaces provided. Show all necessary workings .1. What is the length of the diagonal path to the nearest tenth? Justify your answer.

[3 Marks]

Calculate by sketching a model of your choice (i.e.counters, number line, etc.).

[2 Marks]

051015

3 jumps of 5 backwards

Janet has two pieces of ribbon that are each m long. She needs to

cut each piece into smaller lengths of m. She thinks she will get 18pieces of the appropriate length. Do you agree or disagree? Explainyour answer.

[3 Marks]

4. Solve:[2 Marks]

Section 2 – Selected Response: Shade the appropriate bubble on the bubble sheet .

11. Which set of numbers could be the side lengths of a right triangle? A) 1, 1, 2B) 8, 15, 17C) 10, 12, 15D) 10, 20, 30

If the left side equals the right side, you have a pythagorean triple

What is the value of , in metres, to one decimal place?

A) 2.8B) 9.0C) 13.1D) 14.9

Thomas owes $15 to each of 3 friends. Which equation represents thetotal amount Thomas owes?

The water level in a pool dropped 8 cm each hour. How many hoursdid it take for the water level to drop 48 cm?

B)C) +6D) +40

In a game, a player earns 3 points for every hit and loses 2 points forevery miss. James has 15 hits and 16 misses. If James wants afinal score of 31, how many more points does he need?

B)C) 13

Which expression is equivalent to ?

A ditch holds 12 tonnes of dirt. A pickup can carry tonnes of dirt. How many pickup loads would fill 7 ditches?

Which is the correct net for this solid?

Which solid can be constructed from this

What is the total surface area, in , of this cube?

A) 4B) 16C) 24D) 64

What is the surface area, in cm2, of this rectangular prism?

A) 352B) 512 C) 704D) 960

The surface area of a cube is . If each edge is doubled, what is

the new surface area, in ?

A) 200B) 300C) 1200D) 2400

What is the surface area, in cm2, of this triangular prism?

A) 30B) 43 C) 90 D) 780

A cylinder has a diameter of 10 cm and a height of 20 cm. What is the

volume of the cylinder, in ?

A) 200B) 785C) 1570D) 6280 10cm

The volume of this right prism is 17 . What is the area of the

base, in ?

A) 16B) 17C) 160D) 1700

What percent of the larger grid is shaded?

A) 39%B) 39.03%C) 39.3%D) 40%

39 full blocks

3/10 of a block

Therefore 39.3%

Which percentage is equivalent to 0.004? A) 0.04%

B) 0.4%C) 4%D) 40%

Last year an eReader sold for $150. Today it sells for $105. What is the percent decrease?A) 30%

B) 43%C) 70%D) 143%

There are 45 students going on a school trip. The ratio of boys to girls is 4:5. How many of the students are girls? A) 9

B) 20C) 25D) 36

In his Marathon of Hope, Terry Fox ran 5373 km in 143 days. At this rate, approximately how many kilometres did he run in 10 days? A) 14.3

B) 37.6C) 375.7D) 537.3

Solve: A)

Solve:

What is the first step in solving the equation ?

What type of graph would you use to display the percentage of favorite hockey teams of Grade 8 students? A) bar

B) circleC) lineD) pictograph

What is the probability of rolling a 2 and spinning an odd number?

Jennifer puts these lettered cards in a bag

She selects a card, replaces it, and selects another card. What is theprobability that she will choose A and then B?

A spinner has 12 equal sectors: 4 red, 3 blue, and 5 yellow. Thepointer on the spinner is spun 3 times. What is the probabilityof landing on red, then blue, then red again?

What is the sum of the angles, in degrees, around any given point in a tessellation?

A) 45B) 90C) 180D) 360

Justin created a three dimensional object using blocks. Which is the only correct view of his object?

What is the front view of the object after it has been rotated 9towards you about the axis?

Determine the value o .

Multiply by the reciprocal

Cross Reduce, Multiply Numberators, Multiply Denonimators

Find a common denominator

Change improper fraction to a mixed number

An aquarium has the dimension . The wateris 8 cm from the top. What volume of water is in the aquarium?

Find the surface area of a cylinder with a diameter of 30cm and the height of 20cm.

Alyssa bought a Blu‐ray Disc on sale for $34.00 which was 85% of the regular price.

(A) What was the regular price of the disc? [2 Marks]

(B) What did she pay, including 13% sales tax? [1 Mark]

In two stores, the same detergent is on special. Which is the better buy? Justify your answer. [3 Marks]

Store A: 6 bottles for $12.48 Store B: 7 bottles for $14.42

A bookstore originally had 12 Math books and 15 Science books. If 6 Math books are sold, what is the new ratio in lowest terms, of math books to the total books? [2 Marks]

The two graphs show sales of T‐shirts at The Tee Shop for May.

Which graph could be misleading? Justify your answer. [2 Marks]

The equation of a linear relation is: (A) Complete this table of values for the relation.[1Mark]

(B) Graph the data from the table in part A on the grid below. [1 Mark]

14. Draw and label any three views of this object?

Top View Front View

Right View

Left View

Use ALL three objects to create a tessellation on the grid below. Repeat your tessellation at least twice.

Grade 8 Math 2012 Answer Key.notebook - Sandra...

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