Answer:

Step-by-step explanation:
2)
a) elimination method
b) substitution method
c) substitution method
For the first part we can elimate the y variable by subtracting the equations. We can then find the value of x.
For the second part we can substitute y as 2x+5 in the second equation and solve for x.
For the third part we can substitute y as 4x+3 in the first equation and solve for x.
3)

Answer:
min = -9
max =3
Step-by-step explanation:
C = x-3y
x ≥0
x≤3
y≥0
y≤3
The minimum will be be when x is smallest and y is at its max
x =0 and y = 3
C = 0 - 3(3)
C = 0-9 = -9
The minimum is -9
The maximum occurs when x is largest and y is smallest
x =3 and y = 0
C = 3 - 3(0)
C = 3-0 = 3
The max is 3
Answer:
$1,823.2
Step-by-step explanation:
Simple interest is calculated using the formula
I = P X R X T
where I is the interest amount
P is the principal amount: 45,580.
R is the interest rate which is 4 %, or 0.04%
T is time, One year.
I = $45,580 x 0.04 x 1
I = $1,823.2 x 1
I = $1,823.2