Answer:
8
Step-by-step explanation:
Divide 192 by 24 and you'll get 8 classes per grade as the answer
Answer:
f(3) = 28.26
Step-by-step explanation:
Substitute r = 3 into f(r) , that is
f(3) = 3.14 × 3² = 3.14 × 9 = 28.26
X ·( x + 1 ) = 600
x² + x = 600
x² + x - 600 = 0

x = ( - 1 - 49 ) / 2 = - 50 : 2 = - 25
x = - 25, x + 1 = - 24
( - 25 ) · ( - 24 ) = 600
Answer:
C ) - 25
<span>y = -7
You cannot divide by 0. If y = -7, the denominator would be 0.</span>
Is where the line is horizontal
1 =< x <= 6
Its B