Part A :
80x0.18= 14.4
Part B :
80x 0.075= 6
Part C
14.4+6 +80=$100
Answer:
each van carries 7 students
each bus carries 60 students
Step-by-step explanation:
let v = # students in a van
let b = # students in a bus
system of equations:
13v + 2b = 211
4v + 4b = 268
I multiplied the 1st equation by -2 to eliminate the 'b' terms
-26v - 4b = -422
+ <u>4v + 4b = 268</u>
-22v = -154
v = 7
substitute '7' for 'v':
4(7) + 4b = 268
28 + 4b = 268
4b = 240
b = 60
Answer:
C
Step-by-step explanation:
9x+4.5-2x=2.3+7x+2.2
9x-2x+4.5=2.3+7x+2.2
7x+4.5-4.5=7x+4.5-4.5
7x=7x
7x-7x=7x-7x
0=0
Answer:
1834.37
Step-by-step explanation:
2x (35.7x25.5) + 2x (35.7x15.1) + 2x(25.5x15.1)
=2(910.35) + 2(539.07) + 2(385.05)
=2(910.35+539.07+385.05)
=1834.37
18x+3y=-21
slope -intercept form: y=mx+b
move 18x to the other side
sign changes from +18x to -18x
18x-18x+3y=-18x-21
3y=-18x-21
divide both sides by 3 to find slope-intercept form
3y/3=-18x/3-21/3
y=-6x-7
answer: y=-6x-7