Answer:
A=πr2=π·212≈1385.44236cm²
-3(2r+7)=3
distribute -3
-6r-21=3
add 21 to both sides, this causes the 21 on the left to cancel itself out.
-6r=24
divide each side by -6, this causes the -6 on the left side to cancel itself out.
r=-4
Answer: A, B and E
Step-by-step explanation:
A residual values should be equally and randomly spaced around the horizontal axis. If the plot looks like any of the images in C and D, then the data set is probably not a good fit for regression. A non-linear pattern is more appropriate.
Quadratics is an equation that rearranged into the standard form. Your equation must always equal zero or it is unsolvable. You can solve a quadratic equation by factoring, grouping or the quadratic formula.
