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ivanzaharov [21]
3 years ago
12

Given the function f(x)=2|x+6|-4,for what values of x is f(x)=6

Mathematics
1 answer:
Serggg [28]3 years ago
7 0

Answer:

[38]

Step-by-step explanation:

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If a cyclist increases his speed by 3 miles per hour, he can reduce the time required for a 6 mile trip by 10 minutes. What is t
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Answer:

Slower speed = 9 mph

Step-by-step explanation:

Let the initial speed (slower speed) = s mph

Speed 's' = \frac{\text{Distance}}{\text{Time}}

            s = \frac{6}{t} -------(1)

If the cyclist increases the speed by 3 mph then the final speed = (s + 3) mph

He can reduce the time 't' by 10 minutes (\frac{1}{6} hours)

Now, (s + 3) = \frac{6}{t-\frac{1}{6}}

s + 3 = \frac{36}{6t-1} --------(2)

Substitute the value of 's' from equation (1) to the equation (2).

\frac{6}{t}+3=\frac{36}{6t-1}

\frac{2}{t}+1=\frac{12}{6t-1}

\frac{2}{t}-\frac{12}{6t-1}=-1

\frac{2(6t-1)-12t}{t(6t-1)}=-1

\frac{12t-2-12t}{t(6t-1)}=-1

-\frac{2}{t(6t-1)}=-1

6t² - t = 2

6t² - t - 2 = 0

6t² - 4t + 3t - 2 = 0

2t(3t - 2) + 1(3t - 2) = 0

(2t + 1)(3t - 2) = 0

t = -\frac{1}{2},\frac{2}{3} hours

But the time can't be negative.

Therefore, t = \frac{2}{3} hours is the answer.

From equation (1),

s = \frac{6}{\frac{2}{3}}

s = 9 miles per hour.

Slower speed = 9 mph is the answer.

6 0
2 years ago
Rectangular Washington County measures 15.9 miles by 9.1 miles what is the county's area
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The answer would be
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8 0
3 years ago
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Calculate the m angle CLA , given m arc AC = 160° and m arc AKC = 200°.
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<span>When two tangent lines intersect, they form an angle that equals
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Source:
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