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3 years ago

Count the possible combinations of 4 letters chosen from D, E, F, G, H.

1 answer:

7 0

You would use the formula nCr

n= 5 which is the number of letters available which are D E F G H

r= 4 sample of letters

you can easily plug into the calculator... or work with the formula!

5C4 = 5

so there are 5 combinations

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The measures, in degrees, of the three angles of a triangle are given by 2x+1, 3x - 3, and 9x. What is the

valentinak56 [21]

Answer:

Step-by-step explanation:

27 degrees

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3 years ago

Thomas reads 2/9 of a book on Monday and 1/6 of it on Tuesday. He reads twice as many pages on Wednesday as on Tuesday. What fra

dezoksy [38]

1/18 is left. Thomas has 1/18 left of his book. How? What denominator can 9&6 relate to? 54? Sure, but it could be lower. How about 18? Ok. We have 18 because 9x2 and 6x3 both equal 18... 2/9 becomes 4/18 because 18 divided by 9 is 2. You multiply 2 with the two from 2/9. 1/6 becomes 3/18 because 18 divided by 6 is 3. You then multiply 3 with the one from 1/6. Put it together and TA-DA... Your answer is 1/18

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3 years ago

A square room in Amber's home has an area of 128 square feet. Which is the best estimate of one side length of the room?

Nitella [24]

A best estimate would be 32

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3 years ago

Read 2 more answers

The areas of two similar triangles are 72dm2 and 50dm2. The sum of their perimeters is 226dm. What is the perimeter of each of t

astraxan [27]

Answer:

Hence, the perimeter of the triangles are:

P=123.2727 dm

P'=102.7272 dm

Step-by-step explanation:

In two similar triangles:

The ratio of the areas of two triangle is equal to the square of their perimeters.

Let A and A' represents the area of two triangles and P and P' represents their perimeter.

Then they are related as:

$\dfrac{A}{A'}=\dfrac{P^2}{P'^2}$

We are given:

A=72 dm^2 , A'=50 dm^2

and P+P'=226 dm.-----------(1)

i.e. $\dfrac{72}{50}=\dfrac{P^2}{P'^2}\\\\\dfrac{36}{25}=\dfrac{P^2}{P'^2}$

on taking square root on both the side we get:

$\dfrac{P}{P'}=\dfrac{6}{5}\\\\P=\dfrac{6}{5}P'$

Now putting the value of P in equation (1) we obtain:

$\dfrac{6}{5}P'+P'=226\\\\\dfrac{6P'+5\times P'}{5}=226\\\\\dfrac{6P'+5P'}{5}=226\\\\11P'=226\times 5\\\\11P'=1130\\\\P'=\dfrac{1130}{11}=102.7272$

Hence,

P=226-102.7272=123.2727

Hence, the perimeter of the triangles are:

P=123.2727 dm

P'=102.7272 dm

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3 years ago

I just need to know the third one pls

katen-ka-za [31]

Answer:

Step-by-step explanation:

we're doing PEDMAS, so do Exponents first.

3² = 9

8 + 10 x 9

Multiply

8 + 90

Add

4 0

3 years ago