Answer:
<u>Answer</u><u>:</u><u> </u><u>D</u>
• first factorise out 10:
• then find factors of the quadratic equation in the bracket:
Kite is flying 78 ft off the ground, and its string is pulled taut. The angle of elevation of the kite is 65º. Find the length o
f the string. Round your answer to
the nearest tenth.
the nearest tenth.
1 answer:
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<u>Part A</u>
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So, the x-intercepts are
<u>Part B</u>
The vertex will be a minimum because the coefficient of is positive.
The x-coordinate of the vertex is
Substituting this back into the function, we get
So, the coordinates of the vertex are
<u>Part C</u>
Plot the vertex and the x-intercepts and draw a parabola that passes through these three points.
The graph is shown in the attached image.
