<span>-28ab-35ab+12b^2-42b^2
add similar element=-</span>28ab-35ab=-63ab
so that..
=-63ab+12b^2-42b^2
add similar element=12b^2-42b^2=-30b^2
=-63ab-30b^2
112 + 18 + 20 = 150 total vehicles
112/150 = 0.746 = 74.6% rounds to 75% passenger cars
18/150 = 0.12 = 12% light trucks
20/150 = 0.133 = 13.3% rounds to 13% heavy trucks
P(light truck followed by heavy truck) = 18/150 * 20/149 = 12/745 or 1.6%...I am not 100% sure on this 2nd part
Answer:
(20,-7)
Step-by-step explanation:
x+2y=6
x = 6-2y
3x+8y=4
3(6-2y)+8y=4
18-6y+8y=4
2y=-14
y = -7
x=6-2(-7)
x = 20
Answer: median: 23 Frequency: 1 is 1 2 is 1 3 is 2