<span><span>The correlation coefficient, r, and
the coefficient of determination,<span> r</span> 2 ,
will appear on the screen that shows the regression equation information
</span>(be sure the Diagnostics are turned on ---
2nd Catalog (above 0), arrow down to
DiagnosticOn, press ENTER twice.)
</span>
So we know the gym charges $10 to join, and the $4 every visit. He wants to visit 20 times, so we multiply 20 by 4 to get the price of 20 visits, which is $80. Then we add $10 for the joining fee. The total will cost him $90. That means he needs to save $44 to visit 20 times. Hope that helps!
The angles are in the ratio of 5:6:9.
Let the angles be represented by:
5x, 6x, and 9x.
The sum of the interior angles of a triangle is 180.
5x + 6x + 9x = 180
20x = 180
x = 9
The angles are 5*9 = 45,
6*9 = 54,
and
9*9 = 81.
The profits this year are $3000. found by $2500×1.2
