Answer:
Step-by-step explanation:
The equation as written doesn’t work. Are you sure it is y = x² + 4x - 10, and not
y = -x² + 4x - 10 ?
y = -(x² - 4x) - 10
y = -(x² - 4x + 2²) + 2² - 10
y = -(x-2)² - 6
the vertex is a maximum at (2,-6)
$40
21 because there is a 1/4 chance and there are 84 questions, so 1/4 (25%) of 84 is 21.
Proportional.
y = 9x
The constant is 9
