81x^4-1=(9x^2-1)(9x^2+1)
=(3x-1)(3x+1)(9x^2+1)
Answer: 10 minutes
Step-by-step explanation:
The first thing is to calculate the amount they can paint per minute.
Eric will paint 1/14 per minute
Jessup will paint 1/35 per minute.
Let t represent the time when the work together, then
1/14 + 1/35 = 1/t
49/490 = 1/t
1/10 = 1/t
Therefore , they will spend 10 minutes when working together
I think these are right
A) -12 open circle going to the left
B) 6 open circle going to the left
C) 12 open circle going to the left
D) -6 open circle to the left
Answer:
the slope of the line is negative
Step-by-step explanation:
Plot the points on a graph and join them to form a closed figure. two sides that are parallel shows it is a trapezoid