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andre [41]
2 years ago
7

Need help on 5 & 6 please !!!

Mathematics
1 answer:
Novosadov [1.4K]2 years ago
5 0

Step-by-step explanation:

Q5. Let the cost of 28subscriptions be $s.

Words: 1subscription/28subscription = $21/$28

Numbers: 1/28 = 21/s

Cross multiply and solve: 1 x s = 21 x 28

s = 588

Answer with label: $588

Q6.

Words: 2inches/3.6inches = 2.5hours/bhours

Numbers: 2/3.6 = 2.5/b

Cross multiply and solve:

2 x b = 2.5 x 3.6

2b = 9

b = 4.5

Answer with label: 4.5hours

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What is the surface area of the figure?
Oliga [24]

Answer:

The total surface area = 582 ft²

Step-by-step explanation:

To find the surface area of it count the number of faces at first

The figure has 8 faces each 2 are equal

1- Two faces with dimensions 4 ft and 15 ft ( base and shaded face)

2- Two faces with dimensions 9 ft and 4 ft

3- Two faces with dimensions 4 ft and 6 ft

4- Two faces with dimensions 15 ft , 9 ft and 6 ft

Area of (1-) = 2(4 × 15) = 120 ft²

Area of (2-) = 2(4 × 9) = 72 ft²

Area of (3-) = 2(4 × 6) = 48 ft²

Area of (4-) = 2[(9 × 9) + (6 × 15)] = 2[81 + 90] = 2 × 171 = 342 ft²

∴ The total surface area = 120 + 72 + 48 + 342 = 582 ft²

5 0
3 years ago
Need to know the answer to the question
Anastaziya [24]
The area is 1680 ft. squared
8 0
3 years ago
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Y Varies directly as X and inversely as Z. Y=100 when X=5 and Z=10 Find Y when X=3 and Z=60
Law Incorporation [45]

Answer:

y = 10

Step-by-step explanation:

based on the question if y  varries directly as x

mathematically

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also, y varries inversly as z can be mathematically expressed as

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y ∝ x ∝ 1/z

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make  k the subject of formulae

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Divide both sides by x

k =yz/x

when y=100 , x = 5 z =10

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to find y when x = 3 and z = 60

<h3>from the equation connecting x,y,z</h3>

k =yz/x

200 =60y/3

cross multiply

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5 0
2 years ago
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77julia77 [94]
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rate for Steve is 1 room per 7hrs

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2 years ago
A triangle abc with vertices a (6,8) b(6,12) and c(10,12) is rotated 180 degrees. what are the coordinates of B
Oksi-84 [34.3K]
The rule for a rotation by <span>180
</span>(x,y)→(−x,−y)
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answer

</span>B'(-6, -12)
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3 years ago
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