QUESTION IMAGE
Question
vertical/adjacent/complementary angles (algebraic)
score: 0/5 penalty: 1 off
question
solve for the value of d.
answer attempt 2 out of 2
d = 14
Step1: Identificar ángulos adyacentes
Los ángulos $(8d + 4)^{\circ}$ y $(6d+8)^{\circ}$ son adyacentes y forman un ángulo recto (90°). Entonces, $(8d + 4)+(6d + 8)=90$.
Step2: Simplificar la ecuación
Combinar términos semejantes: $8d+6d+4 + 8=90$, lo que se convierte en $14d+12 = 90$.
Step3: Despejar la variable
Restar 12 de ambos lados: $14d=90 - 12$, es decir $14d=78$. Luego dividir por 14: $d=\frac{78}{14}=\frac{39}{7}\approx5.57$.
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$d=\frac{39}{7}$