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3 years ago

This is Quadratics. (5n−5)(2+2n)

Mathematics

1 answer:

ki77a [65]3 years ago

5 0

Answer: 10n^2 - 10

Step-by-step explanation:

(5n - 5)(2+2n) becomes (5n-5)(2n+2)

= (5n)(2n) + (5n)(2) + (-5)(2n) + (-5)(2)

= 10n^2 - 10

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aleksley [76]

Answer-

<em>The price of gas will be</em><em> $4.2</em>

Solution-

Gas prices in shelby county = $3.00 per gallon

Market scientist predicts a 40% increase in the price of gas in the coming month.

So the new price will be,

$=3+(3\times \dfrac{40}{100})$

$=3+(3\times 0.4)$

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Therefore, the price of gas will be $4.2

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How do I solve for x here? Use the properties of logarithms to find a value for x. Assume a,b, and M are constants.

Leona [35]

Yes, you're right! The first step is rewriting the equation as

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Subtract $\ln(a)$ from both sides:

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Use the property $\ln(a^b) = b\ln(a)$ to rewrite the equation as

$x\ln(b) = M-\ln(a)$

Divide both sides by $\ln(b)$

$x = \dfrac{M-\ln(a)}{\ln(b)}$

Alternative strategy:

Consider both sides as exponents of e:

$e^{\ln(ab^x)} = e^M$

Use $e^{\ln(x)} = x$ to write

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Divide both sides by a:

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Consider the logarithm base b of both sides:

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The two numbers are the same: you can check it using the rule for changing the base of logarithms

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3 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

There are 20 students. Two-fifths of the students are girls. How many students are girls?

Mariulka [41]

Answer:

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Step-by-step explanation:

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