Question

Evaluate each equation for x = -2 and y = -5
​

Answer 1

(a) - 10 , (b) - 3

Explanation:

(a)

given

1 - 2x + 3y ← substitute x = - 2 and y = - 5 into the expression

= 1 - 2(- 2) + 3(- 5)

= 1 + 4 - 15

= 5 - 15

= - 10

(b)

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

| - a | = | a | = a

given

- | x - y | ← substitute x = - 2 and y = - 5 into the expression

= - | - 2 - (- 5) |

= - | - 2 + 5 |

= 1 | 3 |

= - 3