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antoniya [11.8K]
3 years ago
5

Which numbers are the means of the proportion shown below 2/3 = 20/30

Mathematics
2 answers:
valentina_108 [34]3 years ago
5 0

A <u>proportion</u> is simply a statement that two <u>ratios</u> are equal. In problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. To find the cross products of a proportion, we multiply the outer terms, called the <u>extremes</u>, and the middle terms, called the <u>means</u>.

Consider given proportion

\dfrac{2}{3}=\dfrac{20}{30}.

Here, 2 and 30 are the extremes and 3 and 20 are the means.

Answer: the means are 3 and 20.

murzikaleks [220]3 years ago
3 0
It's 3 and 20.
If that's an option for you!
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Question 11-(3 marks available)
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Answer: 1080 cm^{2}

Determine the values of b1, b2, and b3, the sides of the triangular base. Also determine the value of h, the height of the triangular base and l, the length of the prism (the length between the bases).

The sides of the triangular base are:

b1 = 13 in.

b2 = 14 in.

b3 = 15 in.

The triangular base is a right triangle, and so the height is one of our sides. We will use

h = 12 in.

The length of the prism is

l = 20 in.

total surface area = bh + (b1+b2+b3)*l

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1 year ago
Solve:<br> sin5x - cos2x + sin x = 0.
mote1985 [20]

Answer:

x = 10 , 45 degrees.

Step-by-step explanation:

This seems a tricky one .

I guess we can use   sin A + sin B =  2 sin (A+B)/2 cos (A - B) / 2

so sin 5x + sin x = 2 sin 3x cos 2x so our equation becomes

2 sin 3x cos 2x - cos 2x = 0

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so 2 sin 3x = 1

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or cos 2x = 0

so 2x = 90

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8 0
3 years ago
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