75 80 85 90 95 100 105 110 and so on
Answer:
x= 1
Step-by-step explanation:
y= -2 + 1
3x - 2y = 5
substituting method:
substituting y= -2+1 in equ. 3x-2y=5
=> 3x - 2(-2 + 1) = 5
=> 3x +4 -2 = 5
=> 3x + 2 = 5
=> 3x = 5 -2
=> 3x = 3
=> x = 3/3
=> x = 1
Area=legnth times width
legnth is 1 less than 2 times width
l=legnth
w=width
l=-1+2w
l=2w-1
area=lw
area=45
subsitute
45=lw
45=(2w-1)w
distribute
45=2w^2-w
subtract 45 from both sides
0=2w^2-w-45
factor because if we have xy=0 and we factor we can assume that x and/or y=0 so
trial and error factor
0=(2w+9)(w-5)
set each to zero
0=2w+9
subtract 9
-9=2w
divide 2
-4.5=w
impossible since width cannot be negative so discard
w-5=0
add 5 to both sides
w=5
true
subsitute
l=2w-1
l=2(5)-1
l=10-1
l=9
w=5 cm
l=9 cm
18 feet = 18/3 yard = 6 yard
6 inches = 1/2 feet = 1/6 yard
Volumen = (6yar)(6yard)(1/6yard) = 6 cubic yard
Cost = 6 cubic yard * $42.00 / cubic yard = $ 252.00
Answer: the first option, 252.00