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Gennadij [26K]
3 years ago
11

Sam scored 59, 64, and 68 on three test. How many points should he get on the fourth test to get an average score of 70?

Mathematics
2 answers:
wel3 years ago
7 0

Answer:

To find this out the easy way, add up all the numbers and an answer, then divide by 4.

59 + 64 + 68 + 63.67 = 254.67

254.67/4 = 63.66

A is not correct.

59 + 64 + 68 + 65.25 = 256.25

256.25/4 = 69.25

B is not quite correct.

59 + 64 + 68 + 75 = 266.

266/4 = 66.5

C is not correct.

59 + 64 + 68 + 89 = 280

280/4 = 70.

D.) is the correct answer.

I hope this helps!

ch4aika [34]3 years ago
5 0
The correct answer would be (D - 89 points)
59+64+68
=191 + 89
=280/4
=70(%)
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Answer:

Question 1 = c) Medium: 88 ft²

Question 2 = d) 46.7 ft³

Step-by-step explanation:

Question 1

We would be solving this question by finding the surface area of the tent. The shape of the tent is a square based pyramid.

The surface area of a square based pyramid(tent) =

a² + 2ah

Where in the diagram,

a = base length = 4 ft

h = height of the pyramid (tent ) = 9ft

Surface area = 4² + 2 × 4 × 9

= 16 + 72

= 88ft²

Therefore, the size tarp should she purchase is Medium: 88 ft²

Question 2

For question 2, from the attached diagram, we can see that the diagram is a square based pyramid.

To calculate the amount of water that would fill the square based pyramid, we would have to find the Volume of the tent(square based pyramid).

The formula for the Volume of the tent(square based pyramid) = 1/3(a²h)

Where a = base edge

h = height of the pyramid.

From the diagram,

a = base edge => 4ft.

From the question,

h = height of the tent is given as how tall the tent is = 8.75ft.

Therefore, 1/3(a²h)

1/3 × (4ft)²× 8.75ft

= 46.67ft³

Approximately = 46.7ft³

Therefore, the amount of water it would it take to fill the tent, if the tent is 8.75 ft tall is 46.7ft³

3 0
3 years ago
Three farmers can reap a field in 6 hours. The owner wants the field to be reaped in 1 hour. How many farmers should he have wor
kkurt [141]

Answer:

18 men are required to reap the field in 1 hour

Step-by-step explanation:

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3 0
2 years ago
If p(x) = x^2 – 1 and q(x)=5(x-1), which expression is equivalent to (p – q)(x)? 5(x – 1) – x^2 – 1 (5x – 1) – (x^2 – 1) (x^2 –
Murrr4er [49]
P(x) = x^2 - 1
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8 0
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Answer:

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Step-by-step explanation:

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3 years ago
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olga nikolaevna [1]

Answer:

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Step-by-step explanation:

if 8 limes costs 2 dollars, then 4 limes cost 1 dollar

you purchased 12 limes so since you already know what 8 limes coms, you could subtract that

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now you need to find out how much for 4 limes which would be half the price of 8 limes.. which should be 1 dollar

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finally 5 dollars minus 3 would result in a change of 2 dollars

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