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Alexxx [7]
3 years ago
14

the sum of the three numbers is 69. if the second number is equal to the first diminished by 8, and the third number is 5 times

the first. what is the numbers? if x represents the first number, then which of the following equations could be used to solve the problem?
Mathematics
1 answer:
Troyanec [42]3 years ago
4 0
A+b+c=69
a=b+8
b=a-8
c=a/5
a is 11 (3+8= 11 which is a)
b is 3 (11-8=3 which is b)
c is 55. <span>(11 x 5=55 which is c)</span>

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23 + 8m + 4n - 5m - 27​
mylen [45]

Answer:

-4 + 3m + 4n

Step-by-step explanation:

In this question, you are combining like terms, meaning doing equations to numbers that fit with only each other.

<u>So we should start on the number without variables:</u>

23 and 27

<u>Match them up together and you should find your first equation:</u>

23 - 7

==> -4

So we should have  -4  +  8m  +  4n  -  5m

Now we should combine the numbers with the variable of m:

8m and 5m

<u>Match them up together and you should find your first equation:</u>

<u></u>

8m - 5m

==> 3m

So we should now have -4  + 3m  + 4n

<u></u>

<u>Since there are no other variables of n, we are all done:</u>

<u>-4  + 3m  + 4n  is  your  final  answer </u>

4 0
3 years ago
By what percent will a fraction decrease if its numerator is increased by 20% and its denominator is increased by 50%?
Angelina_Jolie [31]

Answer:

  20%

Step-by-step explanation:

With those changes, the fraction is multiplied by ...

  \dfrac{1+.20}{1+.50}=1-\dfrac{.30}{1.50}=1-0.20

That is, the value of the fraction is decreased by 20%.

5 0
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Answer:

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Step-by-step explanation:

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What is 4/5 of 45 equle
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4/5 of 45 equals 36.
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