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2 years ago

There are 1,000 students.out those students 20 percent speak spanish how many speak spanish

Mathematics

2 answers:

uysha [10]2 years ago

6 0

1,000 x .2 = 200 speak spanish

sertanlavr [38]2 years ago

4 0

Percent means parts out of 100
20% of 100=20
times 10 both sides
20% of 1000=200
answer is 200

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A w=V/ lh

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Step-by-step explanation:

w=V/ lh

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w= 120/15 = 8cm

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Step-by-step explanation:

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LuckyWell [14K]

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3 bags of sour cream and onion crisps

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3 years ago

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Answer:

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Step-by-step explanation:

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2 years ago

The lengths of two sides of a right angled triangle are 20 cm and 30 cm.

Naddik [55]

Answers:

Part (a) 10*sqrt(13)
Part (b) 10*sqrt(5)

Those values are exact. They approximate to:

10*sqrt(13) = 36.0555

10*sqrt(5) = 22.3607

====================================================

Explanation:

Part (a)

If the unknown third side is the hypotenuse then we need to find the value of c when a = 20 and b = 30.

Apply the pythagorean theorem

a^2 + b^2 = c^2

20^2 + 30^2 = c^2

400 + 900 = c^2

1300 = c^2

c^2 = 1300

c = sqrt(1300)

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c = sqrt(100)*sqrt(13)

c = 10*sqrt(13) .... exact length

c = 36.0555 ...... approximate length

------------------------------------

Part (b)

If the third side is not the hypotenuse then that must mean c = 30 is the hypotenuse as this side is larger than the 20 cm side. The hypotenuse is always the longest side.

Let a = 20 be the known leg. Let's find the other unknown leg b using the pythagorean theorem.

a^2 + b^2 = c^2

20^2 + b^2 = 30^2

400 + b^2 = 900

b^2 = 900-400

b^2 = 500

b = sqrt(500)

b = sqrt(100*5)

b = sqrt(100)*sqrt(5)

b = 10*sqrt(5) ..... exact length

b = 22.3607 ....... approximate length

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2 years ago