Answer:
A
Step-by-step explanation:
the standard form of a quadratic equation is
ax² + bx + c = 0 : a ≠ 0
obtain (5 + x)(5 - x) = 7 in this form by expanding the factors
25 - x ² = 7 ( subtract 7 from both sides )
18 - x² = 0 ( multiply through by - 1 )
x² - 18 = 0 ← in standard form
with a = 1, b= 0 and c = - 18 → A
2,205 hours a year.
245 days a year.
so the eq. can be written as y =x-4
the slope is -1.
the perpendicular slope would be 1.
The final eq. would be
y = x -7
6*x=16
(* this symbol means multiplication)
