Question

How to do this question? I don't really know what the lines next to 2t are, or are they just brackets?

Answer 1

- 14

Explanation:

the bars around 2t , indicate the absolute value of 2t

the absolute value function always gives a positive value , that is

| - a | = | a | = a

so for example

| - 4 | = | 4 | = 4

given

`(2)/(3)` p - | 2t | - s² ( substitute values for p, t and s into the expression )

=
`(2)/(3)` × 12 - | 2(- 3) | - (- 4)²

= 2 × 4 - | - 6 | - 16

= 8 - 6 - 16

= 2 - 16

= - 14