Expression with Substitution

the sum of fifty-two and a number

• n-52

• 52 + n

• 52/n

• 52n

Work out the value of the following expressions when a = 3, b = 4 and c = 5.
3ab

• 10

• 12

• 15

• 36

Work out the value of the following expressions when a = 3, b = 4 and c = 5.
2a

• 5

• 6

• 8

• 10

Evaluate -2x  if     x = 10

• -8

• 20

• -20

Evaluate the expression 3x + 2y when x = 4 and y = 5.

• 19

• 23

• 30

• 22

Simplify the expression 2(x + 3) - 4x when x = 2.

• 2

• -2

• 4

• 6

Substitute the value of a in the expression 5a - 2b when a = 3 and b = 2.

• 13

• 7

• 11

• 9

Evaluate the expression 2(x - 4) + 3y when x = 6 and y = 2.

• 10

• 14

• 8

• 6

Simplify the expression 4a + 2b - 3a when a = 2 and b = 5.

• 12

• -2

• 10

• 0

Substitute the value of x in the expression 3x^2 - 2x + 1 when x = -1.

• 2

• 0

• 6

• -4