Regents Ready Quizizz #4

Multiple Choice

Rationalize the denominator:
$$\frac{1}{4\sqrt{10}}$$  

• $$\frac{\sqrt{1}}{4}$$  

• $$\frac{\sqrt{10}}{40}$$  

• $$\frac{1}{4}$$  

• $$\frac{\sqrt{10}}{400}$$  

Multiple Choice

Rationalize the denominator:
$$\frac{7\sqrt{3}}{\sqrt{10}}$$  

• $$\frac{70\sqrt{3}}{10}$$  

• $$\frac{7\sqrt{3}}{100}$$  

• $$\frac{7\sqrt{30}}{10}$$  

• $$7\sqrt{3}$$  

Multiple Choice

Rationalize the denominator: $$\frac{\sqrt{5}}{\sqrt{6}}$$  

• $$\sqrt{5}$$  

• $$\frac{\sqrt{30}}{6}$$  

• $$\frac{\sqrt{5}}{6}$$  

• $$\frac{\sqrt{30}}{36}$$  

Multiple Choice

Solve the system by substitution.
 
5x + 4y= −14
y =  −7x  −  15 

• (-2, -1)

• (1, -2)

• (-2, 1)

• (-1, -2)

Multiple Choice

x + 2y = 2
x = -4y + 2

• (-3, 0)

• (0, 2)

• (-3, -2)

• (2, 0)

Multiple Choice

4x +  8y = 20
-4x + 2y = -30
Which variable will be eliminated?

• The  x
• The  y
• The  z
• The unknown

Multiple Choice

Solve by elimination:
4x+9y=28
-4x-y=-28

• (-7,0)
• (6,0)
• (-6,0)
• (7,0)

Multiple Choice

Solve by elimination:
7x + y = -9
-3x - y = 5

• No solution
• (1,8)
• (-2,-3)
• (-1,-2)

Multiple Choice

Solve by elimination 
-2x + 6y = 16
-4x  - 3y = 2

• (2,2)
• (-2, -2) 
• (-2,2)
• (2,1)

Multiple Choice

• (-3, 2)

• (3, 2)

• (-2, 3)

• (2, -3)