Working alone, it would take shandra 40 minutes to sand a table. to sand the same table, also working alone, it would take
kelly 1 hour. if they work together, the situation can be modeled by the following equation, where t is the time it would take to
sand the table working together.
1/40+1/60=1/t
shandra claims it will take them about 50 minutes working together, because 50 is the mean of 40 and 60. which best
describes shandra's claim?

 it will take them about 24 minutes working together

Step-by-step explanation:

1/40    +   1/60 =

6/240 +  4/240 = 10/240 = 1/24

1/24 = 1/t

Cross multiplication:

1*t = 1*24  

t= 24

the range is 19

step-by-step explanation:

the range is biggest number minus the smallest, so in this case it would be

41 - 22 = 19

y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4