3 years ago

Find the ratio a:b, if it is given that a/5 = b/7

1 answer:

8 0

$\bf \cfrac{a}{5}=\cfrac{b}{7}\implies \stackrel{cross-multiplying}{7a=5b}\implies \cfrac{a}{b}=\cfrac{5}{7}~\hfill a:b\qquad 5:7$

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Estimate what is 31.75÷8= you have to estimate tho

Afina-wow [57]

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3 years ago

There are 10 computers and 5 students. How many ways are there for the students to sit at the computers if no computer has more

mestny [16]

Answer:

30,240 ways

Step-by-step explanation:

This question is bothered on permutation. Permutation has to do with arrangement.

If there are 10 computers and 5 students, the number of ways students will sit at the computers if no computer has more than one student can be expressed as;

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10P5 = 10*9*8*7*6*5!/5!

10P5 = 10*9*8*7*6

10P5 = 30,240

Hence the number of ways is 30,240 ways

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3 years ago

The sale price of an item is 0.75 the original price of the item, x. Which statement explains why both 34x and 0.75x can find th

defon

Answer:

Step-by-step explanation:

34x and 0.75x are not the same expression.

8 0

4 years ago

Read 2 more answers

Is 5 a solution to the equation 2x^2 + 10 = 60 yes or no

cricket20 [7]

2(5)^2+10
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4 years ago

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A child has 4 wooden blocks. How many different ways can she stack 3 of them into a tower?

faltersainse [42]

Answer:

Step-by-step explanation:

To find the number of different ways she can stack 3 of them in a tower, we need to use the formula:

$_{n}P_{k}=\dfrac{n!}{(n-k)!}$

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k = 3

$_{n}P_{k}=\dfrac{4!}{(4-3)!}$

$_{n}P_{k}=\dfrac{4!}{1!}$

$_{n}P_{k}=\dfrac{4*3*2*1!}{(1)!}$

$_{n}P_{k}=\dfrac{4*3*2*1!}{1}$

$_{n}P_{k}=\dfrac{24}{1}$

7 0

3 years ago