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Tanzania [10]
3 years ago
13

F 9 is added to twice a number and this sum is multiplied by 4​, the result is the same as if the number is multiplied by 4 and

12 is added to the product. what is the​ number? the number is negative 6.
Mathematics
1 answer:
riadik2000 [5.3K]3 years ago
8 0
Let
x---------> the number

we know that
[9+2x]*4=4x+12
36+8x=4x+12
8x-4x=12-36
4x=-24
x=-24/4
x=-6

the answer is
-6
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Marla has $4.55 in dimes and quarters. If she has 7 more quarters than dimes, how many quarters does she have?
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Answer:

She have <u>15 quarters</u>.

Step-by-step explanation:

Given:

Marla has $4.55 in dimes and quarters.

Now, to find the quarters she have, if she has 7 more quarters than dimes.

Let the number of dimes be x.

And the number of quarters be 7+x.

As the value of dime = $0.10.

And the value of quarter = $0.25.

So, according to question:

⇒0.10x+0.25(7+x)=4.55

⇒0.10x+1.75+0.25x=4.55

⇒0.35x+1.75=4.55

<em>Subtracting both sides by 1.75 we get:</em>

⇒0.35x=2.8

<em>Dividing both sides by 0.35 we get:</em>

⇒x=8

Thus, the number of dimes = 8.

And the number of quarters = 7+x = 7+8 = 15.

Therefore, she have 15 quarters.

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3 years ago
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sergiy2304 [10]

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Step-by-step explanation:

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Pretty sure you just divide 14,136/23,550 and then that percent would be the answer
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