What is the value of x? (4x +7) [5(x-4)] Enter your answer in the box. X =
1 answer:
You might be interested in
So we know that the slope-intercept form of an equation is:
And we are given the equation:
So we need to subtract 2x from both sides:
And then divide both sides by 3:
Answer:
(5, - 4)
Step-by-step explanation:
Given a quadratic in standard form : ax² + bx + c : a ≠ 0
Then the x- coordinate of the vertex is
= -
x² - 10x + 21 ← is in standard form
with a = 1, b = - 10, so
= -
= 5
Substitute x = 5 into the quadratic for the corresponding value of y
y = 5² - 10(5) + 21 = 25 - 50 + 21 = - 4
vertex = (5, - 4)