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3 years ago

4 p 2x + 3p 7x Help please

Mathematics

1 answer:

suter [353]3 years ago

3 0

Answer:

Hope this helps :O

Step-by-step explanation:

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5M + 10 = 3M - 4

andrezito [222]

Answer:

The answer is D

Step-by-step explanation:

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4 years ago

John has 48 square centimeter tiles he wants to use to

Zinaida [17]

b or the second option

The correct answer for the question that is being presented above is this one: "w(w + 2) = 48." John has 48 square centimeter tiles he wants to use to create a mosaic. He wants the mosaic to be rectangular with a length that is 2 centimeters longer than the width.

Let w = width

Let (w+2) = length

Area = w(w+2).

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3 years ago

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7x what gives me 1 can someone answer I'm new

Lelu [443]

Doing (7x÷7) I think equals 1

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3 years ago

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Stu Dent has 7 different math books, 5 different science books and 10 different engineering books. Find the number of ways to pi

zepelin [54]

Answer:

155

Step-by-step explanation:

Number of math books = 7

Number of science books = 5

Number of engineering books = 10

We need to find the number of ways to pick two books with different subjects.

Solution :

We will use combination here .

If we need to choose r objects from total n objects ,

$n_{C_{r}}=\frac{n!}{r!(n-r)!}$

So, number of ways to pick two books of same subjects = $7_{C_{2}}+5_{C_{2}}+10_{C_{2}}=\frac{7!}{2!5!}+\frac{5!}{2!3!}+\frac{10!}{2!8!}\\\\=\frac{7\times 6}{2}+\frac{5\times 4}{2}+\frac{10\times 9}{2}\\\\=21+10+45=76$

Also, number of ways to select any two books = $22_{C_{2}}=\frac{22!}{2!20!}=\frac{22\times 21}{2}=21\times 11=231$

Therefore , number of ways to pick two books with different subjects =

number of ways to select any two books - number of ways to pick two books of same subjects = 231 - 76 = 155

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4 years ago

Which fraction is equivalent to<br> ?<br> -3/2

irina [24]

-6/4 here you go :D tthere

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3 years ago