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2 years ago

14

When 6 is added to four-times a boy's current age the results are 58 years old what is the boy's current age

1 answer:

topjm [15]2 years ago

5 0

he is 13

easy math!!

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−13π/5 find the reference angle

miss Akunina [59]

I would convert to degrees first seems to make it easier.
$\frac{-13 \pi }{5}$ × $\frac{180}{ \pi }$
= -468
by adding 360 twice we get the coterminal angle 252

252 is in the 3rd quadrant so 180 is the closest angle on the x-axis
ref angle = 252 - 180 = 72

If necessary convert back to radians... $72( \frac{ \pi }{180} )= \frac{2 \pi }{5}$

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2 years ago

Is 0.48 equal to 6/15

Yuliya22 [10]

No is not because 6/15 is 0.4

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2 years ago

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What is the value of 3-(-2)?<br> A. 0 -5<br> B. -1<br> C. 0_1<br> D. 5

Irina18 [472]

3-(-2)
= 3-(-2)
= 3 + 2
= 5
The Answer is 5

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2 years ago

Determine the domain of the function (fog) (x) where f(x) = 3x-1/x-4 and g(x)=x+1/x

Mrac [35]

Answer:

$(-\infty,0)\cup(0, \frac{1}{3})\cup (\frac{1}{3},\infty)$

Step-by-step explanation:

The given functions are $f(x)=\frac{3x-1}{x-4}$ and $g(x)=\frac{x+1}{x}$ .

We now composed the two functions to find:

$(f\circ g)(x)=f(g(x))$

$\implies (f\circ g)(x)=f(\frac{x+1}{x})$

$\implies (f\circ g)(x)=\frac{3(\frac{x+1}{x})+1}{\frac{x+1}{x}-4}$

$\implies (f\circ g)(x)=\frac{4x+3}{1-3x}$

This function is defined if the denominator is not zero.

$1-3x\ne0$

$x\ne\frac{1}{3}$

We write this in interval notation as:

$(-\infty,\frac{1}{3})\cup (\frac{1}{3},\infty)$

We need to be cautious here as x=0 is not in the domain of g(x).

Therefore the domain of $(f\circ g)(x)$ is

$(-\infty,0)\cup(0, \frac{1}{3})\cup (\frac{1}{3},\infty)$

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2 years ago

Find the number one-third of the way from 1/6 to 4/5.

masya89 [10]

I got u with this it really easy

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2 years ago