2d = 17e -8
2e = d-9 d-9 = 2e multiply by -2 -2d+18= -4e and add to first equation to get
18 =13e-8
13e = 26
e = 2
a = #adults revenue = 8a
c = #children = 2200-a revenue = 4.5(2200-a) summed, the revenues add to 5050
8a + 4.5(2200-a) = 5050 solve for a, the # of adult tix then c = 2200-a
N = 7th graders
2N = 8th graders
[.06 (2N) + .03(N) ] / 3N = [.12 +.03]/3 = .05 = 5% of total students
time = distance/rate
x/35 = (169.5-x)/ 78 x is the distance by car
78x = 35(169.5-x)
78x = 5932.5 - 35x
x = 52.5 m by car time by car = 52.5m / 35 m/hr = 1.5 hr + 1.5 hr by 'copter = 3 hrs
pi/6 x 360o/2pi = 300 pi/6 is 300 sin pi/6 = sin 30 = 1/2
Actually the previously posted anserers found
z = 1 +i 1 - i -1 +i and -1 - i
Bisect means both angles are equal
2x+10 = 3x-18
x = 28 2(28)+10 + 3(28) - 18 = BUL = .........
log 96889010407 / log7 = 13
Center rectangle (x+2 + x-1) * (x-1) = (2x+1)(x-1) = 2x^2 -x-1
plus TWO squares 2 * ( x-1)(x-1) = 2 (x^2-2x+1)
Add the reds for area
Angle opposite 57 is 180 - 57 = 123o
ENTIRE lower arc from 57 to B is then 2 x 123 = 246o
Arc encompassed by angle next to 'b' is thus 246 - 100 = 146o
meaning the supplementary angle with b is 73o
b + 73 = 180 b = 107o