1/5 (Tue) Quantitative Algebra

1/5 (Tue) Quantitative Algebra

Multiple Choice

• A

• B

• C

• D

Multiple Choice

• A

• B

• C

• D

Multiple Choice

What is the center of the circle with equation x² + y² = 1?

• (1, 1)

• (0, 0)

• not enough information

Multiple Choice

Write the equation at the origin with radius 6.  

• x^2 + y^2 = 6
• x^2 + y^2 = 36
• x  + y = 6
• x + y = 36

Multiple Choice

Which is the correct equation for a circle whose center is the origin and has a radius of 3?

• x² - y² = 3

• x² - y² = 9

• x² + y² = 3

• x² + y² = 9

Multiple Choice

Which is the correct equation of a circle that is centered at the origin (0,0) and has a radius of 2?

• x² + y² = 2

• x² + y² = 3

• x² + y² = 4

• (x - 2)² + (y - 2)² = 4

Multiple Choice

What is the equation for this circle?

• (x+1)+(y+1)=9
• x²+y²=9
• x+y=9

Multiple Choice

Write the equation of a circle with center (h,k) and radius r.

• x^2 + y^2  = r^2
• (x + h)^2 +  (y + h)^2 = r^2
• (x - h)^2 + (y - k)^2 = r^2
• (x - h)^2 - (h - k)^2 = r

Multiple Choice

In the equation (x-3)²+(y+4)²=121, the radius of the circle is

• 242
• 11
• 121
• 22

Multiple Choice

In the equation (x-3)²+(y-2)²=16, the center of the circle is...

• (3,2)
• (-3, -2)
• (-2, -3)
• (2, 3)

Multiple Choice

In the equation (x+2)²+(y-3)²=4, the radius of the circle is...

• 4
• 2
• 3
• 16