Square Root Functions — Unit test

Question 1

During a baseball game, a player hits a ball while a bird is flying across the field. Let t be the time in seconds since the ball is hit and h be the height in feet. The height of the baseball over time is modeled by the equation h = –16t2 + 65t and the height of a bird over time is modeled by the equation h = 8t + 20. What do the intersection points of the equations represent?

Revolt · Accepted Answer

the time when the height of the ball and the bird are the same

Question 2

Which equation is y = –6x2 + 3x + 2 rewritten in vertex form?

Revolt · Accepted Answer

Answer image: https://media.edgenuity.com/evresources/3111-03-10/mc009-3.jpg

Question 3

What is the value of i 97 – i?

Revolt · Accepted Answer

0

Question 4

Which expression is equivalent to (4 + 6i)2?

Revolt · Accepted Answer

–20 + 48i

Question 5

If , which inequality can be used to find the domain of f(x)?

Revolt · Accepted Answer

4 x + 9 greater-than-or-equal-to 0

Question 6

Which pair of complex numbers has a real-number product?

Revolt · Accepted Answer

(1 + 3i)(1 – 3i)

Question 7

Using the quadratic formula to solve 11x2 – 4x = 1, what are the values of x?

Revolt · Accepted Answer

StartFraction 2 Over 11 EndFraction plus-or-minus StartFraction StartRoot 15 EndRoot Over 11 EndFraction

Question 8

Which equation represents a graph with a vertex at (1, –6)?

Revolt · Accepted Answer

y = 3x2 – 6x – 3

Question 9

Which equation is y = 3(x – 2)2 – (x – 5)2 rewritten in vertex form?

Revolt · Accepted Answer

Answer image: https://media.edgenuity.com/evresources/3111-03-10/mc011-4.jpg

Question 10

Which system is equivalent to

Revolt · Accepted Answer

StartLayout Enlarged left-brace 1st row 5 minus x = 9 x squared 2nd row y = 5 minus x EndLayout

Square Root Functions — Unit test Answers

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