Homework Book Odds

Pages 80 - 81 Odds

5.

A) S.S.S (SidexSidexSide)
4.5cmx4.5cm=20.25cm
20.25x4.5=91.1cm3

91.1cm3 is the anwser.

B) S.S.S(SidexSidexSide)

7cmx7cm=49cm

49cmx7xm=343cm3

343cm3 is ther anwser.

7.A)

9)

I got a Questions for you. Do you think you can figure this out?

contractor is buying cement for 1000 triangular parking barriers. How much concrete does she need?

99454m

99344m

99465m

99456m

99654m

or View Results

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If you need help with thi click this!

Breanna's Homework Book Pg.54-55

These are the 3 questions I did in our homework booklet.

Question #2

Calculate the serface are of each rectangular prism to the nearest tenth of a centimetre squared.

a)

LxW

11.5 x 3.2 = 36.8

11.5 x 3.2 = 36.8

11.5 x 5 = 57.5

11.5 x 5 = 57.5

3.2 x 5 = 16

3.2 x 5 = 16

36.8 + 57.5 + 16 = 110.3

110.3 x 2 = 220.6

T.S.A = 220.6

b)

LxW

12 x 10.4 = 124.8

12 x 10.4 = 124.8

12 x 4.5 = 54

12 x 4.5 = 54

10.4 x 4.5 = 46.8

10.4 x 4.5 = 46.8

124.8 + 54 + 46.8 = 225.6

225.6 x 2 = 451.2

T.S.A = 451.2

Question #3

Find the surface area of each triangular prism to the nearest tenth of a centimetre squared.

a)

LxW/2 LxW

7 x 2.5 = 17.5

8 x 2.5 = 20

10.6 x 2.5 = 26.5

8 x 7 = 56 /2 = 28

8 x 7 = 56 /2 = 28

17.5 + 20 + 26.5 + 28 +28 = 120

T.S.A = 120 cm squared.

b)

L x W/2 L x W

8 x 4.5 = 36

8 x 4.5 = 36

8 x 4.5 = 36

3.35 x 6 = 20.1 /2 = 10.05

3.35 x 6 = 20.1 /2 = 10.05

36 + 36 + 36 + 10.05 + 10.05 =128.1

T.S.A = 128.1

Question #4

Ty is painting this storage bench for the deck. How much area does he need to paint, to the nearest hundreth of a square metre?

LxW

0.5 x 1.56 = 0.78

0.5 x 1.56 = 0.78

0.5 x 1.56 = 0.78

0.5 x 1.56 = 0.78

0.5 x 0.38 = 0.19

0.5 x 0.38 = 0.19

0.78 x 4 = 3.12

0.19 x 2 = 0.38

0.38 + 3.12 =

T.S.A = _______

Here is a link that I found! *click here*

Also Here`s a video I found! Check it out

What is the answer to question #4?

35

350

3.5

0.35

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Homework book

Homework book pages 42-43

1) Label each example with the mental math strategy it represents.:halving , doubling , dividing by ten. Then , complete the calculation

a) 1% of 66%
10% of 66% = $6.60
so, 1% of 66 = $0.66 dividing by 10

b) 5% of 180
10% of 180 = 18
So, 5% of 180 = 9 halving

c) 20% of $3.20
10% of $3.20 = $0.32
So, 20% of $3.20 = $0.64 doubling

2) Circle the terms that correctly complete this statement. To calculate the percent of the number, write the percent as a (decimal/percent), and then (divide/multiply by the number.

Answer: it would be divide then multiple.


3) Use the mental math to determine each of the following. show you thinking.
a) 200% or 4500
Answer :900 doubling
b) 0.1% or 600
Answer : 0.6
c) 1 1/4% of 80
Answer :1 halving
d) 30% of 70
Answer :21 divided by 10
e) 4/5% of 15
Answer :12 doubling by 10
f) 450% of 300
Answer :1350 doubling, halving


4) What is the percent of each number? Give you answer to the nearest hundredth.

a) 1/5% of 630
Answer:1.26
b) 23 7/8 of 300
Answer:71.63
c) 245% of $356
Answer:$874.16
d) 68 3/4 of 730
Answer:501.88
e)360% of $129.95
Answer:$467.82

Christian A's Homework Book Homework

I did question 5 and 6.

5.) The commission for the sale of a house was 63/4%. If the house sold for $345 000, how much was the commission? Show your thinking.


The commission was $23287.50

6.) Table salt is a chemical compound of soduim and chlorine. Recommended daily intake is about 1700 mg. If Canadians consume 182% of this amount on average, how much sodium is one person eating daily?


The person is eating 3094 mgs daily.

Using the Pythagorean Relationship, Homework Book

1. RED is the answer
The Pythagorean relationship can be used to determine the Length of the Hypotenuse of a right triangle when the lengths of the two Legs are known.

3. Question - Determine the length of each hypotenuse. Show your work.
a)
a squared + b squared = c squared
40cm squared + 9cm squared = c squared
(40x40) + (9x9) = c squared
1600cm + 81cm = c squared
The square root of 1681cm = c squared
41 cm squared = c squared


b)
a squared + b squared = c squared
12m squared + 35m squared = c squared

(12x12) + (35x35) = c squared

144m squared + 1225m squared = c squared
The square root of 1369m squared = c squared

37m squared = c squared

5. Question - Calculate the missing side length for each right triangle, to the nearest tenth of a centimetre. Show your work.

a)
a squared = c squared - b squared
a squared = 6 cm squared - 5 cm squared
a squared = (6x6) - (5x5)
a squared = 36cm squared - 25cm squared
The square root of 11 = a squared
a squared = 3.31cm squared

b)

a squared = b squared - c squared
a squared = 7cm squared - 12cm squared
a squared = (7x7) - (12x12)
a squared = 49cm squared - 144cm squared
The square root of 95 = a squared
a squared = 9.74

7. Question - A triangle is made up of two smaller congruent right triangles.

a)

a squared + b squared = c squared

4m squared + 2m squared = c squared

(4x4) + (2x2) = c squared

16+ 4 = c squared

The square root of 20 = c squared
4.5 = c squared

b)

a squared = c squared - b squared

a squared = 8m squared - 4.5 squared

a squared = 8m squared + 4.5m squared + 4.5m squared

a squared = 17m squared

SORRY ITS SO LATE GUYS :)

BY:KRIS G

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