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Lubov Fominskaja [6]
4 years ago
7

If f(x) = x² + x - 4, evaluate f(2i).

Mathematics
1 answer:
Ganezh [65]4 years ago
4 0

Answer:

-6+2i

Step-by-step explanation:

f(2i)=2i^2+2i-4

2i^2 is -2 because i^2 is-1, times 2 is -2.

Therefore, the equation becomes -2+2i-4, leaving the answer of -6+2i.

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Answer: C. Rickys rate was 0.25 more per hour" .

Step-by-step explanation:

Susan received $27 for 6 hours of work. Susan's rate we hour will be:

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From the option given, the correct option is C "Rickys rate was 0.25 more per hour" .

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719 = (78 × 9) + ____ find the unknown number
viva [34]

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Question 15 (5 points)
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With a line 7 cm long. Use a set square and a ruler and draw perpendicular lines at both ends
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Answer:

See Explanation

Step-by-step explanation:

According to the Question,

Steps of construction:

  • Step I - Draw a line segment AB = 7 cm with the help ruler.
  • Step II - with vertex A, by using compass take more than half of AB and draw arcs, one on each side of AB.
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(For Diagram please find in attachment)

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