Let
= -9,
= -12 and so on.
-15 = -9 + (-6)
-15 = -9 + 2(-3)
Let -3 be the common difference, or <em>d</em>.
= -9 + n(-3)
= -9 - 3n
2/25 = x/80....2 chaperones to 25 students = x chaperones to 80 students
cross multiply because this is a proportion
(25)(x) = (2)(80)
25x = 160
x = 160/25
x = 6.4......so basically, since u cant have .4 of a person, we need to round up, so the school needs 7 chaperones for 80 students
Answer:
17/2
Step-by-step explanation:
The graph of the given absolute funciton |2xd-5| is attached below
Find the area of each triangle using the graph
Take the area from x=0 to 4
break the graph into two right angle triangle
Area of the triangle = 1/2 times base times height
Green triangle x=2.5 to 4
base = 3/2 and height = 3
Area of green part =
Red triangle x=0 to 2.5
base = 5/2 and height = 5
Area of red part =
Total area=
Answer:
a) 3(1.2x - 8) or 3.6x - 24
b)
3(1.2x - 8) = 12
1.2x - 8 = 4
1.2x = 12
x = 12/1.2
= 10