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Rufina [12.5K]
3 years ago
12

SOMEONE PLS HELP ME WITH THIS

Mathematics
2 answers:
LekaFEV [45]3 years ago
7 0

Answer:

Divide both sides by 0.8;

x = 11.25

Step-by-step explanation:

jolli1 [7]3 years ago
4 0

Answer:

x = 11.25

Step-by-step explanation:

-6 = 0.8x - 15

Add 15 to both sides;

-6 + 15 = 0.8x - 15 + 15

9 = 0.8x

Divide both sides by 0.8;

x = 11.25

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I’m sorry, but could you provide more details to your question?
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3 years ago
The sum of four consecutive integers os -18. what is the greatest of these integers?
Len [333]
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19z+12=20z–8<br> help i dont really understanddd!!!
alekssr [168]

Answer:

z = 20

Step-by-step explanation:

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6 0
2 years ago
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serious [3.7K]

Answer:

A

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7 0
3 years ago
Find f. f ″(x) = x^−2, x &gt; 0, f(1) = 0, f(6) = 0
marin [14]

If you do in fact mean f(1)=f(6)=0 (as opposed to one of these being the derivative of f at some point), then integrating twice gives

f''(x) = -\dfrac1{x^2}

f'(x) = \displaystyle -\int \frac{dx}{x^2} = \frac1x + C_1

f(x) = \displaystyle \int \left(\frac1x + C_1\right) \, dx = \ln|x| + C_1x + C_2

From the initial conditions, we find

f(1) = \ln|1| + C_1 + C_2 = 0 \implies C_1 + C_2 = 0

f(6) = \ln|6| + 6C_1 + C_2 = 0 \implies 6C_1 + C_2 = -\ln(6)

Eliminating C_2, we get

(C_1 + C_2) - (6C_1 + C_2) = 0 - (-\ln(6))

-5C_1 = \ln(6)

C_1 = -\dfrac{\ln(6)}5 = -\ln\left(\sqrt[5]{6}\right) \implies C_2 = \ln\left(\sqrt[5]{6}\right)

Then

\boxed{f(x) = \ln|x| - \ln\left(\sqrt[5]{6}\right)\,x + \ln\left(\sqrt[5]{6}\right)}

3 0
2 years ago
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