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LiRa [457]
3 years ago
14

4t+7-9=-6+6t please help

Mathematics
1 answer:
True [87]3 years ago
7 0
Simplify. Combine like terms.

7 - 9 = -2

4t - 2 =  -6 + 6t

Isolate the t. Note the equal sign. Add 2 to both sides, and subtract 6t from both sides

4t (-6t) - 2 (+2) = -6 (+2) + 6t (-6t)

4t - 6t = -6 + 2

Simplify

-2t = - 4

Isolate the t, divide - 2 from both sides

-2t/-2 = -4/-2

t = -4/-2

t = 2

t = 2 is your answer


hope this helps
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Step-by-step explanation:

Comment

If 4 numbers have an average of 9, then total of the 4 numbers is 4 * 9 = 36.

If one of the 4 numbers is  a 7, then

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7 + x = 36           Subtract 7 from both sides

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2 years ago
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murzikaleks [220]

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6

Step-by-step explanation:

The given expression is,

\frac{5^{x+2}-5^x }{5^x\times4}

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5^{x+2}=5^x . 5^2

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\frac{5^{x+2}-5^x}{5^x\times4}=\frac{5^x.5^2-5^x}{5^x\times4}

Now, taking 5^{x} common from the numerator of the given expression, then

\frac{5^{x+2}-5^x}{5^x\times4}=\frac{5^x(5^2-1)}{5^x\times4}

\implies\frac{5^{x+2}-5^x }{5^x\times4}=\frac{5^2-1}{4}

\implies\frac{5^{x+2}-5^x}{5^x\times4}=\frac{5\times5-1}{4}=\frac{25-1}{4}

\implies\frac{5^{x+2}-5^x}{5^x\times4}=\frac{24}{4}=6

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8 0
4 years ago
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As of mid-2016, the world's population was about 7.4 billion people. The population of Country A was 226 million. In mid-2016, w
kherson [118]

Answer:

The percentage of country A population to the world population

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Step-by-step explanation:

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