The minimum number of sixty passenger buses needed is 4
Answer:
$27.59
Step-by-step explanation:
calculate the sales tax:
30 x .15 = 4.5
30 - 4.5 = 25.5
calculate sales tax
25.5 x .082 = 2.09
25.5 + 2.09 = $27.59
10x+3y=43
-9x-y=-20
From second equation,
y=-9x+20
Substitute third equation into first equation,
10x+3(-9x+20)=43
10x-27x+60=43
-17x=43-60
-17x=-17
x=1
y= -9+20= 11
Option B
Answer:
24 packages
Step-by-step explanation:
The given quadratic describes a parabola that opens upward. Its one absolute extreme is a minimum that is found at x = -3/2. The value of the function there is
(-3/2 +3)(-3/2) -1 = -13/4
The one relative extreme is a minimum at
(-1.5, -3.25).
_____
For the parabola described by ax² +bx +c, the vertex (extreme) is found where
x = -b/(2a)
Here, that is x=-3/(2·1) = -3/2.