Answer: a+a+a+a=4a
mark brainleist
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Answer:
-7x^2 +8x -10
Step-by-step explanation:
Combine like terms in the usual way.
(-3x^2 +5x -8) -(4x^2 -3x +2)
= -3^2 +5x -8 -4x^2 +3x -2
= (-3-4)x^2 +(5+3)x +(-8-2)
= -7x^2 +8x -10
Answer: A=60 square feet
Explanation: w=10*0.6=6 ft.
A=lw
A=10*6=60 square feet.
Answer:
Original number of days were 40.
Step-by-step explanation:
We know that,
The factory produced 70 items in one day.
So, items produced in 'x' number of days = ![70x](https://tex.z-dn.net/?f=70x)
After hiring 3 more people, the factory produced 10 more items daily and completed the work 5 days before the schedule.
That is, the factory produced 80 items in one day.
Then, items produced in 'x-5' number of days = ![80(x-5)](https://tex.z-dn.net/?f=80%28x-5%29)
So, we get,
![70x=80(x-5)](https://tex.z-dn.net/?f=70x%3D80%28x-5%29)
i.e. ![70x=80x-400](https://tex.z-dn.net/?f=70x%3D80x-400)
i.e. ![10x=400](https://tex.z-dn.net/?f=10x%3D400)
i.e. x= 40.
Hence, the number of days to complete the work originally were 40.