Imaginary Numbers
What is the value of i^2?
-1
2x−7≤9
x≤8
Solve the system:
x+y=10
x−y=2
x=6 and x=4
What is the value of the square root of −36?
6i
Simplify 3i+7i
10i
A concert venue allows fewer than 500 people inside.
Write the inequality for the number of people p.
p<500
How many solutions does a system have if the two lines are parallel?
None
What is the distance between the points (2,3) and (6,7)?
4(sqrt2)
Simpify i^15
-i
x/4 −3>1
x>16
Solve the system:
2x+3y=13
4x−y=5
(x,y)=(2,3)
The sum of two numbers is 12, and their difference is 4. What are the numbers?
8 and 4
Simplify (3+2i)(4−i)
14+5i
Which inequality represents the region above the line y=2x+1?
y>2x+1
Solve the system:
x/2 + y =7
x-y=1
(16/3, 13,3)
If the area of a square is 144, what is the length of one side?
12
Simplify:
(6+8i)/(2-i)
4/5 + 22/5i
Solve the inequality: (x-3)/(x+2) <0
−2<x<3
Solve the system:
x+y+z=6
x−y+z=4
x+y−z=2
(x,y,z)=(3,1,2)
What is the sum of the interior angles of a 20-sided polygon?
Hint: (n−2)×180
3240°