Answer:
(x+4) (x+12)
Step-by-step explanation:
x^2 +16x+48
What numbers multiply to 48 and add to 16
4*12 = 48
4+12=16
(x+4) (x+12)
Answer:
At 9:39 they both will Flick
Step-by-step explanation:
so when the first light flicks it resets and starts counting to anthor 8 mins while the other takes 4 mins extra just keep adding till they both have same time
Answer:
x = 130°
Step-by-step explanation:
Segment AC tangent to circle O then ∠A = 90°
Segment BC tangent to circle O then ∠B = 90°
finally ,
x = 360 -(90+90+50) = 360-230 = 130
Answer:
S = 128πx² + 64πx + 8π
Step-by-step explanation:
Suraface area of a cylinder is given by:
S = 2πrh + 2πr²
We know that the height is 3 times as big as the radius, hence:
h = 3r
so we can plug in the new h value and rewrite the S equation as:
S = 2πrh + 2πr²
S = 2πr(3r) + 2πr²
S = 6πr² + 2πr²
S = 8πr²
We're given in the question that the radius is (4x + 1) inches, so plug that into r.
Given: r = 4x + 1
Therefore,
S = 8πr²
S = 8π(4x + 1)²
S = 8π(16x²+8x+1)
S = 128πx² + 64πx + 8π