Kacinski Benchmark review-part 1

Steffen graphed two lines in order to find the solution to a given system of equations.
What is the solution?

• (-3,-8)
• (-8,-3)
• (3,-8)
• (8,3)

Which of the following is equivalent to (4-i)(2+3i)?

• 19
• -3
• 11+10i
• 5+10i

Which of the following is equivalent to 
(5-3i)+(-6+2i)?

• -1-5i
• -1-i
• 11-i
• -30-6i

Determine the solutions of the equation
x²+ 49 = 0

• ±7
• ±7i
• 49i
• (i+7)(i-7)

Use the graph of f(x) to determine the real solutions to f(x)=0.

• -10
• 2, 5
• 0, 7
• no real solution

Use the graph of f(x) to find the real solutions of f(x)=0.

• 0, 5
• -2
• 0, -4
• no real solution

Choose the correct answer for the operation pictured.

• 32
• 36-4i
• 36+24i
• 32+24i

Choose the answer that represents the rationalized complex number.

• (4-3i)/25
• 35/(16-9i)
• 20i/(4-3i)
• (3+4i)/5

√(-45)

• -3√(5)
• 5i√3
• 3i√5
• -5√3

3i + 2i

• 5i
• 5i²
• 6i
• -5