The common difference is +6 +6 is added to each subsequent term
from 2000 to 2005 would be FIVE +6's = 30
You could still do it this way:
1 / (1/r1 + 1/r2) = 1 /( r2/(r2 *r1) + r1/(r2*r1) ) = R2 * R1 /( R2+R1) See how it works out? ONLY with TWO resistors in parallel though !
Since they are wired in parallel, all three resistors have the same voltage (12v) applied across them.....the smallest resistor will have the largest current....the largest resistor will have the smallest current
9x^2 + 24x + a =
9 (x^2 + 24/9 x + a/9) 'complete the square'
9(x^2 + 24/9x + 144/81) where 144/81 = a/9 a = 16
9 ( x + 12/9)^2
9 x^2 + 24x + 16 =
(3x+4)^2
1 / (1/10 + 1/30 + 1/5) = 3 ohms
Have you seen this?
the resultant resistance of two resistors in parallel = (r1 x r2) /(r1+r2) = 300/40 = 7.5 ohms
V=IR or V/R = I 45 v /7.5 ohm = 6.00 A
Distance to and from are the same = d
speed to sis = x
speed from sis = x+10 m/hr
rate x time = d
3 hrs * x m/r = 2.5 hr (x+10)
3x = 2.5x + 25
.5x = 25 You can take it from here !
Circumference = pi * d = 22 pi inches
800 feet = 9600 inches
9600/22pi = ~~139 revolutions
tan(27o 25') = H/88
H= 45.647 ft = 45 ft 7.8 in
Assuming angle B is a right angle = 90o
13x +7 + 4x+15 = 90 solve for 'x'
