D. is the correct answer.
The value of x that is the length from the edge of the screen to the end of the wall is equal 3. This is derived from an equation which serves as a function of the Area. See the solution below.
<h3>
What is the calculation for the solution above?</h3>
Recall that the area of the entire wall is 40m².
(10-2x) (16- 2x) = 40
Expanding the brackets, we have
160-20x-32x + 4x² = 40
4x² - 52x + 120 = 0
x² - 13x +30 = 0
Using the quadratic equation
x = (-b±√b²-4ac)/2a
Where a = 1
b = 13
c = 30
x = (13 ± 7)/2
Thus x = 10; or x = 3.
x cannot be the answer because it invalidates 16-x<0;
Hence, the correct answer is x = 3
Learn more about Areas at:
#SPJ1
Answer:
A.−3x^4+2x^2−4x
B.4p^7−10p^5+2p^4
Step-by-step explanation:
A.x(−3x^3+2x−4) then simplify −3x^4+2x^2−4x
B. -2p^3(-2p^4+5p^2-p) then simplify 4p^7−10p^5+2p^4
First what you need to do is make 6meters into centimetres so what how many meters in a centimetre
100cm so you do 100 x 6= 600
After that you do 600 divided by 28 then by 78 then you will find the answer.
126 divided by 7 equals 18
18 m
