Select the correct answer. What is the domain of the function represented by this graph? the graph of a quadratic function y = x
^2 – 4 with a minimum value at the point (0,-4)
A. x ≥ 4
B. x ≤ 0
C. all real numbers
D. -2 ≤ x ≤ 2
A. x ≥ 4
B. x ≤ 0
C. all real numbers
D. -2 ≤ x ≤ 2
2 answers:
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Answer:
x = 20
Step-by-step explanation:
since the triangle is a right angle, that means the angle is 90 degrees
equation:
30 + 3x = 90
subtract 30 on both sides
30 - 30 + 3x = 90 - 30
3x = 60
then divide each side by 3
x = 20