Question

Ajuda por favor preciso pra hj

a) 5x - 10 para x = 2
b) 3x + y para x= 1 e y = 3
c) 4 + 2x para x = 5
d) 2a + b para a = 4 e b = 1

Answer 1

Resposta ↓

Valor de:

a) = 0

b) = 6

c) = 14

d) = 9

Explicação passo a passo:

⇒ Para calcularmos, substituímos as incógnitas por cada valor indicado nas letras: a, b, c e d:

=====================================================

✍ Cálculo:

$a)\ 5x - 10\\\\\\Trocando\ x\ por\ 2\\\\\\a)\ 5.2 - 10\\\\\\a)\ 10 - 10\\\\\\a)\ = 0$

=====================================================

$b)\ 3x + y\\\\\\Trocando\ os\ valores\ de\ e\ y:\\\\\\b)\ 3.1 + 3\\\\\\b)\ 3 +3\\\\\\b)\ = 6$

=====================================================

$c)\ 4+ 2x\\\\\\Trocando\ o\ valor\ de\ x\ por\ 5:\\\\\\c)\ 4 + 2.5\\\\\\c)\ 4 + 10\\\\\\c)\ = 14$

=====================================================

$d)\ 2a + b\\\\\\Trocamos\ x\ e\ y\ por\ 4\ e\ 1:\\\\\\d)\ 2.4 + 1\\\\\\d)\ 8 + 1\\\\\\d)\ = 9$

Espero ter ajudado :)

Att: LDC