Answer: -3 + 4i
Step-by-step explanation: -3 +4 = 2.
2 +2 = 4 and I is an absolute number so i=1.
4 + I (1) = 5
Answer:47/12
=3.9167
Step-by-step explanation:
The answer is B. 70 _____
Answer: The length of the side of the square poster is 8 feet
The length of the side of the square sign is 10 feet
Step-by-step explanation:
Let the length of one side of the square poster be x
Let the length of one side of the square sign be y
Since they are both squares, the area of a square is expressed as length^2
A square poster has sides measuring 2 feet less than the sides of a square sign. It means that
y = 2+x
If the difference between their areas is 36 square feet, it means that
y^2 - x^2 = 36 - - - - - - - 1
Substituting y = 2 + x into equation 1, it becomes
(2+x)^2 - x^2 = 36
4 + 4x + x^2 - x^2 = 36
4x = 36 - 4 = 32
x = 32/4 = 8
y = 2 + x = 2 + 8
y = 10
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