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Vitek1552 [10]
3 years ago
15

Add 5 to me.Then divide by 7.If you add 12 and the subtract 7,you get 10

Mathematics
1 answer:
qaws [65]3 years ago
6 0

Answer: 30

Step-by-step explanation:

Let the number be y

Add 5 to me

Y+5............equ1

Divide by 7

Y+5/7

Add 12

Y+5/7+12

Subtract 7

(Y+5)/7+(12-7)=10

12-7=5

Substitute

(Y+5)/7+5=10

Find the lowest common multiple

((Y+5)+7(5))/7=10

(Y+5)+35)/7=10

Cross multiply

Y+5+35=70

Y+40=70

Y=70-40

Y=30

The unknown number is 30

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Answer:4 3/8

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8 0
3 years ago
An account earns simple interest. Find the interest earned. $1200 at 2.8% for 30 months
sasho [114]

let's bear in mind that a year has 12 months, so 30 months is really 30/12 years.


\bf ~~~~~~ \textit{Simple Interest Earned}
\\\\
I = Prt\qquad
\begin{cases}
I=\textit{interest earned}\\
P=\textit{original amount deposited}\dotfill & \$1200\\
r=rate\to 2.8\%\to \frac{2.8}{100}\dotfill &0.028\\
t=years\to \frac{30}{12}\dotfill &\frac{5}{2}
\end{cases}
\\\\\\
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8 0
3 years ago
A first number plus twice a second number is 1. Twice the first number plus the second totals 14. Find the numbers
poizon [28]

Let's consider the first number to be f and the second number to be s. Based on the information in the problem, we can create the following equations:

f + 2s = 1

2f + s = 14


Now, we can solve the equations through systems of equations. One way of doing this is by multiplying one of the equations so that there is a term in both equations which can be removed by addition or subtraction. In our case, we can multiply the entire first equation by 2 to get:

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Now, subtract 2f from both equations to get:

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Now that we have found s, "plug" it back into an equation to find f:

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Our answers are s = -4 and f = 9.

3 0
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Answer:

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So 63360/14.7 issss 4310

Hope this helped

Please mark Brainliest

;p

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Answer:

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