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V125BC [204]
3 years ago
12

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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Gas prices in shelby county are at $3.00 per gallon. if a market scientist predicts a 40% increase in the price of gas in the co
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)

=3+1.2

=4.2

Therefore, the price of gas will be $4.2


5 0
3 years ago
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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

\ln(a) + \ln(b^x) = M

Subtract \ln(a) from both sides:

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

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

ab^x = e^M

Divide both sides by a:

b^x = \dfrac{e^M}{a}

Consider the logarithm base b of both sides:

x = \log_b\left(\dfrac{e^M}{a}\right)

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

7 0
3 years ago
WILL MARK BRANLIEST TO THE CORRECT ANSWER!
krok68 [10]

Answer:

$400.25 is the answer of your question

Step-by-step explanation:

Use Simple interest formula for finding solution in which you use principal as $250 and rate of interest as 4 percent and time period as 15 years and then then to find total amount add Simple interest with principal .

8 0
3 years ago
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225 grams of flour are needed to make 9 cakes.
Brut [27]
So basically, 9 cakes need 225 grams of flour
Therefore 1 cake needs: \frac{225}{9} = 25 grams of flour

Moreover, 20 cakes need: 20 × 25 = 500 grams of flour

500 g > 475 g

Marian does not have enough flour to make 20 cakes
4 0
3 years ago
There are 20 students. Two-fifths of the students are girls. How many students are girls?
Mariulka [41]

Answer:

There are 8 girls.

Step-by-step explanation:

6 0
3 years ago
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