Answer:
<em>1</em>
Row 1: 445
Row 2: 541
Row 3: 637
<em>2</em>
349 + 4.80n
<em>3</em>
135
Step-by-step explanation:
<em>1</em>
For this, use the equation I gave you above to find the costs.
<em>2</em>
First, the cost of the printer will <em>NOT</em> change, for the number of printers Eddie needs to buy does not change, he only needs one. This already helps you figure out that 349 is <em>not </em>a coefficient to the variable, n. However, when it comes to the number of blank shirts Eddie needs to buy, the number of he gets <em>does </em>change, this is the dependent variable that makes the cost vary. Using the equation above, you can plug in any number.
For example, 20.
349 + 4.80(20) = 445
<em>3</em>
For this final part, I just kept using the equation until I got the closest number that is lower than 1000. In this case, 135 got me 997, and 136 was just a few decimals away from 1000, but it was still over.
I'll use x, y, and z for the numbers
x + z = y
x + y = 6 + z
3x - 2y = z
Substitute (x + z) for y in the second equation.
x + (x + z) = 6 + z and solve
2x = 6
x = 3
Rearrange another equation and substitute (3) for x.
(3) + y = 6 + z solve for y
y = 3 + z
substitute y in another equation
3(3) - 2(3+z) = z solve
9 - 6 - 2z = z
3 = -z
z = 3
going back to the first equation:
x+z=y
3 + 3 = 6
Answers:
x=3
y=6
z=3
check all equations to make sure it works for all equations
Answer: The answer is seven.