Answer:
![x = \frac{y - 4}{7}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7By%20-%204%7D%7B7%7D)
Step-by-step explanation:
![y = 7x + 4 \\\\y - 4 = 7x\\\\\frac{y - 4}{7} = \frac{7x}{7}\\ \\ \frac{y - 4}{7} = x](https://tex.z-dn.net/?f=y%20%3D%207x%20%2B%204%20%5C%5C%5C%5Cy%20-%204%20%3D%207x%5C%5C%5C%5C%5Cfrac%7By%20-%204%7D%7B7%7D%20%3D%20%5Cfrac%7B7x%7D%7B7%7D%5C%5C%20%5C%5C%20%5Cfrac%7By%20-%204%7D%7B7%7D%20%3D%20x)
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25 | 18
= 0.72
divide 18 by 25 to get 0.72
1.) Set up an equation
50+80h=310 h stands for hours
-50 - 50
80h= 260
divide 80 to both sides
h=3.25
The mechanic works for 3 hours and 25 minutes
Answer:
Step-by-step explanation:
Given that:
As we know that the Parabola is of type
:
= -4a(y -
) where:
is the origin of the line so we have:
and
<=>
= -4a(y-20)
at y = 0, we have:
= -4a(0-20)
<=>
<=> x = ±
But we know that 2x= 80 <=> x= 40, so:
40 =
<=> 1600 = 80a
<=> a = 20
The equation for the parabola is:
It's height from the center at x= 0 => y= 20
Answer:
the chances of rolling a 3 are 1/6
the changes of not doing it is 5/6