Answer:
Together they will complete the order in 6/5 hours.
Step-by-step explanation:
Lisa an experience shipping clerk can fill a certain order in 2 hours.
Jim a new clerk needs 3 hours to do the same job working.
For 1 hours Lisa can fill 1/2 a order.
For 1 hours Jim can fill 1/3 a order.
For 1 hours togethers can fill 1/2+ 1/3=5/6 a order.
We have the following proportion:
Together they will complete the order in 6/5 hours.
Answer:
b = 3, which is an extraneous solution because if we replace b = 3 in the equation, we must be 5/0 and 30/0, and there is division by 0.
Step-by-step explanation:
The minus common multiply must be (b-3)*(b+3) = b² - 9
7b - 21 + 5b + 15 = 10b
2b = 6
b = 3
Which is an extraneous solution because if we replace b = 3 in the equation, we must be 5/0 and 30/0, and there is division by 0. So this solution is invalid.