Question

Podem me ajudar por favor?​

Answer 1

Questão 1

c) $90^{\circ}$

Questão 2

Item a)

$3x-14+5x-6=180$

$8x-20=180$

$8x=200$

$x=200/8 = 25.$

Item b)

$2x-12+4x+12=180$

$6x=180$

$x=180/6=30.$

Item c)

$4x-6+2x=90$

$6x-6=90$

$6x=96$

$x=16.$

Item d)

$5x+5+3x+13=90$

$8x+18=90$

$8x=72$

$x=9.$