We need to solve for x by completing the square of the given mathematical expression (x+7)(x-9) = 25.
First, we need to perform multiplication of (x+7) and (x-9) such as the expression become:
(x+7) (x-9) = 25
x² -9x +7x -63 = 25
x² - 2x = 25 + 63
Then perform addition of constant values 25 and 63
x² - 2x =88
Add +1 in both sides to complete the expression such as:
x² - 2x +1 = 88 +1
(x-1)(x-1) = 89
(x-1)² = 89
We see that (x-1) is a perfect square, we can now solve for the value of x such as:
(x-1) = +-√89
x1 = +√89 + 1
x1 = 10.4
x2 = -√89 +1
x2 = -8.4
The answers are 10.4 and -8.4.
Density = mass / volume
Density = 44,800 kg/ 5m^3
Density = 8,960 km/m^3
Answer: $2,277.5
Step-by-step explanation:
Hi, to answer this question we have to apply the compounded interest formula:
A = p (1+ r )^t
A = total amount (principal plus returns)
P = principal invest
r =interest rate (decimal form)
t = time (in this case years)
Replacing with the values given:
A = 1295 (1 + 8.4/100)^7
A = 1295 ( 1+ 0.084)^7
A = 1295 ( 1.084)^7
A = 2,277.5
Answer:
um i dont know
Step-by-step explanation:
Hi, thank you for posting your question here at Brainly. I hope I would be able to help you with my simple explanation:)
To calculate for the volume of a cone, the formula would be
V = 1/3*pi*r²*h
where r = 12 cm, h = 8 cm
So,
V = 1/3*pi*12²*8
V = 384*pi
