Answer:
a + 7?
Step-by-step explanation:
The number we are adding seven to is indefinite, so a variable would be in order. a represents the number being add and 7 is what is being added to a.
Hope this helps you somehow. Have a nice day!
Answer:
63°
Step-by-step explanation:
Glad to help
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Answer:
The velocity in the border of the roll is 0.025 m/s.
Step-by-step explanation:
We have a roll that has an angular velocity of

The tangent velocity (of the edge of the roll) can be calculated as

The velocity in the border of the roll is 0.025 m/s.
Mj will be 60 dagree for the others use the hypatos formula