(f+g)(x) = x^2 -2x +6x + 4
(f+g)(x) = x^2 + 4x + 4
(f+g)(x) = (x + 2)^2
(x + 2)^2 = 0
x + 2 = 0
x = -2
answer
B. -2
Answer: 108π m^2
Step-by-step explanation:
Hemisphere means half of a sphere.
Volume of sphere = (4/3)×π×r^3, where r is radius.
So,
volume of hemisphere = half of the volume of sphere
volume of hemisphere = (2/3)×π×r^3
According to question,
volume of hemisphere = 144π m^3
So,
(2/3)×π×r^3 = 144π m^3
(2/3)×r^3 = 144 m^3
r^3 = (144×3)/2
r^3 = 216
r = 6
Now,
Total Surface Area of hemisphere = Curved Surface Area + Area of the Base Circle
= 2πr^2+πr^2
= 3πr^2
= 3π× 6^2
= 108π m^2
The answer is A. You would want to multiply the top by 4 to make y into 4y so that 4y and -4y and cancel when adding the two equations leaving you to solve for x.
Hope this helps.
B.
if you plug it in your answer would be 10