The answer is D. 2
The slope of this line is -1/2
Two lines are perpendicular when multiplying their slopes = -1
The only answer that gives this is D:
(-1/2) * 2 = -1
Answer:
Step-by-step explanation:
Let f represent the number of first-class tickets that Sarah bought. Then she bought (16-f) coach tickets. Her total spending for airfare was ...
1140f +160(16-f) = 9420
980f +2560 = 9420 . . . . simplify
980f = 6860 . . . . . . . . subtract 2560
f = 7 . . . . . . . . . . . . . divide by 980; number of first-class tickets
(16-f) = 9 . . . . . coach tickets
Sarah bought 7 first-class tickets and 9 coach tickets.
(2,2.8)(4,5.6)
slope = (5.6 - 2.8) / (4 - 2) = 2.8/2 = 1.4
y = mx + b
slope(m) = 1.4
use either point (2,2.8)...x = 2 and y = 2.8
now we sub and find b, the y int
2.8 = 1.4(2) + b
2.8 = 2.8 + b
2.8 - 2.8 = b
0 = b
so ur equation is : y = 1.4x + 0..or just y = 1.4x
Considering no discounts for bringing people to the theatre, and a being the number of adults attending the show and b the number of children attending the show then:
Yes, the Property of Equality works for Multiplication
