I think the answer is C. X*4=-12+3
The sine has a range -1 to +1 so y goes from 1+2(-1) to 1+2(1) = -1 to 3
Range: -1 ≤ y ≤ 3
We use the FOIL method here. First, Outer, Inner, and Last.
(5x)(x) = 5x^2
(5x)(-7) = -35x
(2)(x) = 2x
(2)(-7) = -14
5x^2 - 35x + 2x - 14
Now combine like terms.
5x^2 - 33x - 14.
This is the right answer because it is now in the form of ax^2 + bx + c
The radius of the circle is 7 cm because the radius is half of the diameter. In your case, the diameter is 14 cm. So half of 14 is 7. 7 cm is the answer.
Hope this helps.
