(a+2)(5-3)2n^2+6n-108
4an^2 + 8n^2 + 6n - 108 is your answer I believe.
Answer:
10x
Step-by-step explanation:
smaller number is 9 and larger number is 90. The difference is 81.
Answer:
Each student needs to contribute $26.75
Step-by-step explanation:
802.5 divided by 30 is 26.75
Look at the diagram
Sum of two interior angles=exterior angle
And
so
Hence verified
The right answer is Option D: 43 items
Step-by-step explanation:
Time taken to scan each item = 2 seconds
Time taken to process the payment = 40 seconds
Let,
x be the number of items bought
y be the total time
y = 2x+40 Eqn 1
Now
Total time = 2 minutes and 6 seconds
1 minute = 60 seconds
2 minutes = 2*60 = 120 seconds
Total time = 120+6 = 126 seconds
Putting y=126 in Eqn 1
![126=2x+40\\126-40=2x\\86=2x\\2x=86](https://tex.z-dn.net/?f=126%3D2x%2B40%5C%5C126-40%3D2x%5C%5C86%3D2x%5C%5C2x%3D86)
Dividing both sides by 2
![\frac{2x}{2}=\frac{86}{2}\\x=43](https://tex.z-dn.net/?f=%5Cfrac%7B2x%7D%7B2%7D%3D%5Cfrac%7B86%7D%7B2%7D%5C%5Cx%3D43)
43 items are being purchased.
The right answer is Option D: 43 items
Keywords: addition, division
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