Substitution

If x=2 and y=4. What is x+ y+ 2x?

• 12

• 28

• 10

• 23

If x=2 and y=5. What is 4x+5y?

• 97

• 33

• 47

• 7

If x=2, r= 3 and y=4, what is xry?

• 234

• 64

• 24

• 9

If x=2, r= 3 and y=4, what is 2x +3r +4y?

• 29

• 99

• 234

• 28

If x=(-2), r= 5 and y=6, what is xyr?

• 60

• -60

• 256

• -256

If x=(-2), r= (-5) and y=4, what is xyr?

• 254

• -254

• 40

• -40

If x=(-3), r= (-5) and y=(-10), what is rxy?

• 3510

• -3510

• 150

• -150

If x=(-4), r= 5 and y=(-6), what is 2xyr?

• 2456

• -2456

• 120

• -120

If x=6, r= 11 and y=7, what is 2r+3x-2y?

• 220

• 274

• 26

• 54

If D=(-12), A= 8 and B=(-9), what is the value of DAB?

• -1289

• 1289

• 864

• -864