algebra quick check

What is the solution of n² – 49 = 0?

 (1 point)

• –7
• 7
• ±7
• no solution

What is the solution of x² + 64 = 0?

 (1 point)

• –5
• 8
• ±8
• no solution

What is the side length of a square with an area of 144x²?

 (1 point)

• 12
• 12x
• ±12x
• no solution

What is the value of b in the triangle shown below?

 (1 point)

• –4 in
• 4 in
• ±4 in
• no solution

What is the value of z so that –9 and 9 are both solutions of x² + z = 103?

 (1 point)

• –22
• 3
• 22
• 184