Answer:
12 minutes
Step-by-step explanation:
Candles can be manually packed at the rate of ...
... (400 candles)/(36 minutes) = 11 1/9 candles/minute
The two systems together pack candles at the rate of ...
... (400 candles)/(9 minutes) = 44 4/9 candles/minute
Then the machine's packing rate is the difference between the total and the manual rates:
... machine rate = (44 4/9 candles/minute) - (11 1/9 candles/minute)
... = 33 1/3 candles/minute.
At this rate, the machine working alone can pack 400 candles in ...
... (400 candles)/(33 1/3 candles/minute) = (400/(100/3)) minutes
... = 400 × 3/100 minutes = 12 minutes
Answer:
x=35
Step-by-step explanation:
Answer:
y= -2x^2 + 12x -14
Step-by-step explanation:
when I put the points into a graphing calculator this is what I got so I think the answer is -2
Answer:
Step-by-step explanation:
The cost for one pound of beans is $1.79
Calvin bought 4.05 pounds of beans the first time and 2.78 pounds the second time. The total cost for the first time is the amount of beans that he bought for the first time × the cost per pound of beans.
First time cost = 4.05×1.79 = $7.2495
The total cost for the second time is the amount of beans that he bought for the second time × the cost per pound of beans.
Second time cost = 2.78×1.79 = $4.9762
Let y represent total cost in dollars of the beans he bought. Then
y = 7.2495 + 4.9762
y = $12.2257