Round 2

Simplify the expression: 3x + 2y - 4z when x = 2, y = 5, and z = 1.

• 10

• -4

• 12

• 0

Round the number 0.00345 to 3 significant figures.

• 0.0034

• 0.003

• 0.00346

• 0.0035

• 5/8

• 7/8

• 2/8

• 4/8

• 6/7

• 1/2

• 8/15

• 10/12

• 0

• 7

• -2

• 4

Round the number 0.0089 to 2 significant figures.

• 0.01

• 0.0089

• 0.009

• 0.008

5 x = 3 y - z Make [y] the subject of formula

• y=-z+3-5x

• y=5x-z/3

• y=(5x-z)/3

• y=(5x+z)/3

IR = V
(solve for R) 

• R = IV
• R = ^I/_V
• R = ^V/_I
• R = V - I

In A=5ab, make [b] the subject of the formula

• b=A/5a

• b=5Aab

• b=5Ab

• b=5a/A