Answer:
The error she made was that she was adding x and 2.75. She should subtract 2.75 from x.
Another mistake that she made was that she sold each for $7 assuming that she would make a profit of 78, but she should see each necklace for $12.5 so that she could make a profit of $78.
Step-by-step explanation:
The error she made was that she was adding x and 2.75.
She should write the equation as 8 (x - 2.75) = 78; as she spends $2.75 to make a necklace.
By using the correct equation: 8 (x - 2.75) = 78
=> 8x - 22 = 78
=> 8x = 78 + 22
=> 8x = 100
=> x = 100/8
=> x = 12.5
Another mistake that she made was that she sold each for $7 assuming that she would make a profit of 78, but she should see each necklace for $12.5 so that she could make a profit of $78.
Hope this helps you.
It took Trina 4 minutes and 85 seconds, which is really fast.....
If the line has a positive slope and a negative y-intercept, then the <span>points cannot lie on the line where x is negative and y is positive. The points never lie at quadrant 1. Hope this answers the question. Have a nice day. Feel free to ask more questions.</span>
Answer:
(-4,0) or (7,0)
Step-by-step explanation:
If it crosses, the x-axis, y-value would be 0.
=> x² - 3x - 28 = 0
=> x² - 7x + 4x - 28 = 0
=> x(x - 7) + 4(x - 7)
=> x = -4 or 7
