(420,104)(720,164)
slope = (164 - 104) / (720 - 420) = 60/300 = 1/5
y = mx + b
slope(m) = 1/5
(420,104)...x = 420 and y = 104
now we sub and find b, the y int
104 = 1/5(420) + b
104 = 84 + b
104 - 84 = b
20 = b
so ur equation is : y = 1/5x + 20
35 + 75 = 110
10% of 110 = 0.10(110) = 11....ur tax
110 + 11 = 121 <== ur total
Seems like you could just find the speed of the plane with (720*2)km/10hr.
Perpendicular = opposite sign and reciprocal slope
2 slope turns into -1/2
Y = -1/2x + b
Plug in point
-1 = -1/2(6) + b
-1 = -3 + b, b = 2
Solution: y = -1/2x + 2
Answer:
$15
Step-by-step explanation:
He had $20 and he spent 
of that in baseball cards, that is
So, he spent $15 in baseball cards.
