The least common denominator of 5 and 15 is 15.
Let x be the amount earned by Tony. With this representation, Jennifer earned 2x - 40 and Chris earned x + 60. The amounts they earned should sum up to 900. The equation is,
x + (2x - 40) + (x + 60) = 900
The value of x is 220. Therefore, Tony earned $220. Jennifer and Chris earned $400 and $280, respectively.
area of square = 14^2 = 196 square cm
area of circle = 3.14 *7^2 = 153.86 square cm
196 - 153.86 = 42.14 square cm is shaded
I just did this test the answer is B :-)
