Question

Evaluate the following algebraic expressions when

x = -2, y = -3, z =4
Write the value of the expressions in the boxes

a) 2x+3y

b) 2(y - z)

c) 6x over 2y

This question means you need to divide the top by the value of 2y

Answer 1

Solutions below

Explanation:

This question requires the concept of substitution and order of operations (Bracket > Multiplication / Division > Addition / Subtraction).

Given x = - 2, y = - 3 and z = 4,

a) 2 x + 3 y = 2 (- 2) + 3 (- 3) = - 4 + (- 9) = - 4 - 9

= - 13

b) 2(y - z) = 2 (- 3 - 4) = 2 (- 7) = - 14

c)

`(6x)/(2y) \\ = (6( - 2))/(2( - 3)) \\ = ( - 12)/( - 6) \\ = 2`