This question has a few typos.
The complete question, answer & explanation for this question is given in the attachment below.
3/10 or 0.3 is the correct answer.
Answer:
let the number be x
23+7(x)=79
23+7x=79
7x=79-23
7x=56
x=56/7
x=8
I would appreciate if my answer is chosen as a brainliest answer
Answer:
see explanation
Step-by-step explanation:
Given
x² - 9x + 4 = 0 ( subtract 4 from both sides )
x² - 9x = - 4
Using the method of completing the square
Add ( half the coefficient of the x- term )² to both sides
x² +2 (-
)x +
= - 4 + 
(x -
)² = 
Take the square root of both sides
x -
= ±
= ± 

Add
to both sides
x =
± 
← exact solutions
Length = 2w +5
Area = l * w
63 = 2w +5 *w
63 = 2w² +5w
2w² +5w-63=0
(2w-9) (w+7)
2w-9 = 0 w+7=0
2w-9+9=0+9 w+7-7=0-7
2w =9 w= -7
2w/2=9/2
w= 4.5
Since the width can not negative the width is 4.5
Length = 2(4.5) + 5
Length =9 +5
Length = 14
Check
Area = 4.5 * 14
63 = 63