Precalculus, Review Fall Semester, 20-21

Find the center and radius of the circle: (x+2)² + (y-4)² =16

• center: (-2, 4); r = 4

• center: (2, -4); r = 4

• center: (-2, -4); r = 8

• center: (-2, 4); r = 16

Tags

CCSS.HSG.GPE.A.1

(a+b)² = a² + b²

• True
• False

Tags

CCSS.HSA.APR.C.4

CCSS.HSA.SSE.A.2

Using interval notation, the inequality  9 ≥ x  should be written:

• [9, ∞)
• (9, ∞)
• (– ∞, 9]
• (– ∞, 9)

Tags

CCSS.HSA.REI.B.3

(3x^–1)^–2 = ?

• 3x²
• 9x²
• x²/9
• –x²/9

Tags

CCSS.HSA.SSE.B.3

CCSS.HSN.RN.A.2

(x/4)^-2 = ?

• x²/16
• 16/x²
• –16/x²
• –2x/8

Tags

CCSS.HSN.RN.A.1

CCSS.HSN.RN.A.2

The x-coordinate of the vertex of the equation with equation
y = 2x² + 8x – 12 is ?

• –2
• 2
• 4
• –4

Tags

CCSS.HSA.REI.B.4

The solution(s) to the equation
5x² – 2x = 0 is/are?

• x = 2/5
• x = 5/2 
• x = 2/5 and x = 0
• x = 5/2 and x = 0

Tags

CCSS.HSA.REI.B.4

√128

• 64√2
• 16
• 2√8
• 8√2

Tags

CCSS.HSA.SSE.B.3

CCSS.HSN.RN.A.2

what is the value of r?

-1=(r-1)/4

• -5

• 5

• 0

• -3

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.3

Travis earned some money doing odd jobs last summer and put it in a saving account that earns 15% interest compounded continuously. After 8 years, there is $600 in the account. How much did Travis earn doing odd jobs?

• $180.27
• $180.72
• $1992.07
• $1992.70