Answer:
r= 0
Step-by-step explanation:
Cancel equal terms on both sides of the equation:
= 3r - 5r = -4r
collect like terms
= -2r = -4r
move variable to left and change its sign
= -2r + 4r = 0
collect like terms
= 2r = 0
divide both sides of the equation by 2
r=0
Use the Law of Sines:
sin B sin 81 sin 44
---------- = ----------- = --------------
side AC 68 side AB
Then (side AB)(sin 81) = 68(sin 44), or
68 sin 44
side AB = ----------------------- = 47.83 units long
sin 81
Charge for x cars is 25x
Charge for y trucks is 50y
Total charge is 25x + 50y
25x + 50y = 3000
x + 2y = I20
Answer: x + 2y = 120
A. Has the mean of 11
B has the mode of 7
