Acomputer company makes a rectangular screen with a diagonal of 20 inches. the width of the screen is 4 inches less than its length. the dimensions of the computer screen are modeled by the equation x2 + (x – 4)2 = 202. what is the value of x, the length of the screen?

a.) x = –16

b.) x = –12

c.) x = 12

d.) x = 16

*the answer is d, x=16. if anyone wants to answer with an explanation of how this is the answer, i will reward them with brainliest.*

  x^2 +(x-4)^2 =20^2

  x^2 +(x-4)^2 =400

x^2 +(x-4)^2 -400=0

factor:

2x^2-8x-384=0

Factor the 2 out of 2X^2

2(x-16) (x+12) =0

 Divide both sides by 2

(x-16) (x+12) =0

X=16 , x=-12

 Number cannot be negative so x=16

 D.) x = 16

Step-by-step explanation:

Given: The dimensions of the computer screen are modeled by the equation :

To find the value of x , we need to solve the equation.

Now, the above equation can be written as :

Since side cannot be negative therefore, x= 16

answer:   35 % is the probability of a late departure or an early arrival.

step-by-step explanation:

let l represents the late departure and e represents the early departure.

then, according to the question,

p(l) = 12 %,   p(e) = 27 % and = 4 %

and, we have to find out,

but, we know that,

which is the required equation that will use to find the probability of a late departure or an early departure.

therefore,   the probability of a late departure or an early arrival =   35 %

answer:

1.14285714286

step-by-step explanation:

divide 40 into 35 and you will get your answer