Question

For how many jerseys would it be better (less expensive) to choose Print It?
*
1 point
5 Jerseys
10 Jerseys
Any amount more than 15 jerseys
Any amount less than 15 jerseys
Print It will always be a better deal no matter how many jerseys you order.
Print It will never be a better deal.
A teacher purchased 20 calculators and 10 measuring tapes for her class and paid $495.
Later, she realized that she didn’t order enough school supplies.
She placed another order of 8 of the same calculators and 10 more of the same measuring tapes and paid $237.
What do the solutions for the first equation mean (meaning for x and y)?
*
1 point
The number of calculators and measuring tapes you can buy for $495.
The cost for each calculator and the cost of each measuring tape so that the teacher spent $495.
The total cost for the calculators and measuring tapes the teacher bought.
The total number of calculators and measuring tapes the teach bought.
Referring to Q4 - Calculators and Tapes:
How many solutions will there be to this system of equations?
*
1 point
Infinite
3 solutions
2 solutions
1 solution
No solution

Answer 1

I don’t have the pricing or graph for the jersey problem, so I can’t tell which choice is correct. Please paste the two price models or the graph (the cost formulas for Print It and the other option) and I’ll find the break-even point and tell you for which quantities Print It is cheaper.

For the calculators & tapes questions:

- What do the solutions for the first equation mean (meaning for x and y)?
- Correct choice: "The cost for each calculator and the cost of each measuring tape so that the teacher spent $495."
- Explanation: x and y represent the unit prices that satisfy 20x + 10y = 495.

- How many solutions will there be to this system of equations?
- Correct choice: "1 solution."
- Work: From
20c + 10t = 495
8c + 10t = 237
subtracting gives 12c = 258 ⇒ c = 21.50. Then 8(21.50) + 10t = 237 ⇒ 172 + 10t = 237 ⇒ t = 6.50.
- So there is exactly one solution: calculator = $21.50, measuring tape = $6.50.