What is the length of a rectangle that has a width of 2.5 centimeters and a area of 20.5 square centimeters?

!

my teacher won't me.

Which values for a and b will create infinitely many solutions for this system of equations? ax-y=8 2x+y=b

Given the following sampling distribution of one mean with a sample size 49, from a normally distributed population,find the population standard deviation, o.79828588912497

1. writing an equation for an exponential function by 2. a piece of paper that is 0.6 millimeter thick is folded. write an equation for the thickness t of the paper in millimeters as a function of the number n of folds. the equation is t(n)= 3. enter an equation for the function that includes the points. (-2, 2/5) and (-1,2)