Answer:
The angle is about 30.27 degrees.
Step-by-step explanation:
Use the trig ratio cosine because you are given the adjacent leg and the hypotenuse.
![cos^{-1} =19/22](https://tex.z-dn.net/?f=cos%5E%7B-1%7D%20%3D19%2F22)
Plug into a calculator
Rounded to the nearest hundredth the angle is 30.27 degrees.
Answer:
The graph of the inverse function is the same that the graph of the original function
Step-by-step explanation:
step 1
Find the equation of the function in the graph
Let
f(x) ---> the function in the graph
we know that
Is a linear function
take the points (0,6) and (6,0)
<em>Find the slope of the linear function</em>
![m=(0-6)/(6-0)\\m=-1](https://tex.z-dn.net/?f=m%3D%280-6%29%2F%286-0%29%5C%5Cm%3D-1)
<em>Find the the equation of the linear function in slope intercept form</em>
![f(x)=mx+b](https://tex.z-dn.net/?f=f%28x%29%3Dmx%2Bb)
we have
![m=-1](https://tex.z-dn.net/?f=m%3D-1)
---> the y-intercept is given
substitute
![f(x)=-x+6](https://tex.z-dn.net/?f=f%28x%29%3D-x%2B6)
step 2
Find the inverse of the function f(x)
Let
y=f(x)
![y=-x+6](https://tex.z-dn.net/?f=y%3D-x%2B6)
<em>Exchange the variables (x for y and y for x)</em>
![x=-y+6](https://tex.z-dn.net/?f=x%3D-y%2B6)
Isolate the variable y
![y=-x+6](https://tex.z-dn.net/?f=y%3D-x%2B6)
Let
![f^{-1}(x)=y](https://tex.z-dn.net/?f=f%5E%7B-1%7D%28x%29%3Dy)
![f^{-1}(x)=-x+6](https://tex.z-dn.net/?f=f%5E%7B-1%7D%28x%29%3D-x%2B6)
![f^{-1}(x)=f(x)](https://tex.z-dn.net/?f=f%5E%7B-1%7D%28x%29%3Df%28x%29)
In this problem the graph of the inverse function is the same that the graph of the original function
Answer:
Allison worked 6 hours lifeguarding and 3 hours washing cars.
Step-by-step explanation:
Let
Number of hours Allison worked lifeguarding last week = x
Number of hours Allison worked washing cars last week = y
1. Last week Allison worked 3 more hours lifeguarding than hours washing cars hours, then
![x-y=3](https://tex.z-dn.net/?f=x-y%3D3)
<u>Lifeguarding:</u>
$12 per hour
$12x in x hours.
<u>Washing cars:</u>
$8 pere hour
$8y in y hours.
2. Allison earned a total of $96, hence
![12x+8y=96](https://tex.z-dn.net/?f=12x%2B8y%3D96)
You get the system of two equations:
![\left\{\begin{array}{l}x-y=3\\ \\12x+8y=96\end{array}\right.](https://tex.z-dn.net/?f=%5Cleft%5C%7B%5Cbegin%7Barray%7D%7Bl%7Dx-y%3D3%5C%5C%20%5C%5C12x%2B8y%3D96%5Cend%7Barray%7D%5Cright.)
Plot the graphs of these two equations (see attached diagram). These line intersect at point (6,3), so Allison worked 6 hours lifeguarding and 3 hours washing cars.
3/10 so out of the 10 7 people score above average because 10-3=7 and 7+3= 10 7 and 3 make a whole please give me points and mark as brainless