Answer:
All real numbers except x=-7
Step-by-step explanation:
Since
is a discontinuity in the rational function, this makes the denominator equal to 0.
It’s 55 degrees because opposite angles are the same in a circle.
y^2 + 15y + 56 factors to (y+7)(y+8)
This is because 7+8 = 15 is the middle term and 7*8 = 56 is the last term. We can use the box method, FOIL rule, or distributive property to confirm we have the right factorization. I'll use the distributive rule
(y+7)(y+8) = y(y+8) + 7(y+8)
(y+7)(y+8) = y^2 + 8y + 7y + 56
(y+7)(y+8) = y^2 + 15y + 56
Answer:
(-6, 7), r=9
Step-by-step explanation:
The opposite of the number next to the x is -6, the opposite of the number next to the y is 7. The square root of the number on the right (81) is 9, so 9 is the radius.