What is A number that when you add 4 and then divide the sum by 2 will equal 6.

What is the approximate circumference of the circle shown below?

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2

The first week samantha learned to read braille, she could read 10 words per minute. in the second week she increased her speed by 20%. in the third week she increased her speed again by another 25%. how many words could she read per minute by the third week? hurry and tell me!