I did mine work external this. Also, I just took the leaf test, and also I obtained this allisonbrookephotography.com correct. ;-;
1). Replace f(x) v y.
2). Switch x and also y.
3). Fix for y.
x+10 = 2y
x/2 + 5 = y
y = x/2 + 5
Hope that helped!
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The allisonbrookephotography.com come your concern is z =
I"ll resolve this difficulty using proportions, i hope it helps you
We consider the nearby side the both triangle
Adjacent side tiny triangle = x surrounding side large triangle = 10
Proportion of this sides =
Now, consider the opposite next of both triangles
Opposite next fo small triangle = 2 the contrary side big triangle = x
Now, equal both proportions and solve for x
x² = 20
x = 2
Using Geometric mean
Using the Pythagorean organize to find z
z² = (√20)² + 2²
z² = 20 + 4
z² = 24
9 months ago
One hopeful number is 5 less than twice a 2nd number, and also their product is 140. Discover the 2 numbers.
You are watching: What is the inverse of the function f(x) = 2x – 10?
x, y - two positive numbers
one optimistic number is 5 much less than double a second number
(1) x = 2y - 5
their product is 140
(2) xy = 140
substitute indigenous (1) to (2)
(2y - 5)y = 140 use distributive property
(2y)(y) - (5)(y) = 140
2y² - 5y = 140 subtract 140 native both sides
2y² - 5y - 140 = 0
use quadratic formula
a = 2, b = -5, c = -140
b² - 4ac = (-5)² - 4(2)(-140) = 25 + 1120 = 1145
Step-by-step explanation: Since our platform of 2 and 5have no
factors in common, our least typical denominator is 2 · 5 or 10.
In order to gain a denominator of 10 in every fraction,
we main point top and also bottom the the very first fraction by 5
and top and bottom that the second portion by 2.
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That gives us 5/10 - 2/10 which is 3/10.