![\frac{1}{2}(x+5)^2 + 9 = -15](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B2%7D%28x%2B5%29%5E2%20%2B%209%20%3D%20-15%20)
![\frac{(x+5)^2+18}{2} = \frac{-30}{2}](https://tex.z-dn.net/?f=%20%5Cfrac%7B%28x%2B5%29%5E2%2B18%7D%7B2%7D%20%3D%20%20%5Cfrac%7B-30%7D%7B2%7D%20)
Cancel out the denominators.
(x+5)² + 18 = -30
(x+5)² = -30 - 18
(x+5)² = -48
The equation is impossible, we have a negative number.
There isn't a number that squared gives a negative number (the square is always positive).
√(x+5)² = +/- √-48
x+5 = +/- √-48
IMPOSSIBLE
You can write the result in imaginary numbers
x+5=+/- 4i√3
Since there are only 2 numbers in the sequence that are even or greater than 78 it's 2/5th or 0.4
The thickness of a fingernail is about 10^-5 inch
From the complete question, we have the following parameter
Thickness = 1/100000 inch
To represent the thickness in standard form, we do the following:
Express the thickness as a decimal
Thickness = 0.00001 inch
So, the standard form would be:
Thickness = 1 * 10^-5 inch
This gives
Thickness = 10^-5 inch
Hence, the complete statement is:
The thickness of a fingernail is about 10^-5 inch
Read more about standard forms at:
brainly.com/question/5756316
Answer:
y = 2x - 18
Step-by-step explanation:
replace the f(x) for y
y = 1/2 x + 9
switch y and x
x = 1/2y + 9
solve for y
subract 9
x - 9 = 1/2y
divide by 1/2 or multiply by the reciprocal (2)
y = 2x -18