Teacher takes about 25 minutes to make out a test for a mathematics class. How long will it take to make out tests for all five
1 answer:
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The answer is D
To solve the answer you would have needed to multiply the reciprocal of but in this case, Unvi multiplied with the reciprocal of 14.
Answer:
(- 1, 2)
Step-by-step explanation:
Given a quadratic in standard form y = ax² + bx + c : a ≠ 0
Then the x- coordinate of the vertex is
= -
f(x) = x² + 2x + 3 ← is in standard form
with a = 1 and b = 2, hence
= -
= - 1
Substitute x = - 1 into f(x) for corresponding value of y
f(- 1) = (- 1)² + 2(- 1) + 3 = 1 - 2 + 3 = 2
vertex = (- 1, 2 )