Answer:
<h3>x = 3/2 ± √(61/20)</h3>
Step-by-step explanation:
5x² - 15x - 4 = 0
Add 4 to both sides.
5x² - 15x = 4
The coefficient of 5x² is 5, divide both sides by 5.
x² - 3x = 4/5
The coefficient of -3x is -3. Let b=-3.
Then we need to add (b/2)^2=9/4 to both sides to complete the square.
Add 9/4 to both sides.
x² - 3x + 9/4 = 61/20
Factor left side.
(x-3/2)² = 61/20
Take square root of both sides.
x-3/2 = ± √(61/20)
Add 3/2 to both sides.
x = 3/2 ± √(61/20)
Basically he is doubling his original area...
Since A=LW the original W=35/7=5...
70=(7+3)(5+x)
70=10(5+x)
7=5+x
x=2
So he will have to extend the original width by 2 ft
Answer:
i'll follow.
Step-by-step explanation:
Just have to sign up and search for the name, and done.
Answer:
45mph
Step-by-step explanation:
To find the average speed, we must add together all of the different speeds and divide by the quantity of them (assuming all of them are equal in time). In this case we have 2: 50 and 40.
.
Then we divide by 2, since there were two segments of equal length
45mph
The answer to 7 is:y = (4/9)x + (13/9).
The answer to 8 is B, I think.
