Question 5, x could be either 6 or -1.
Reta a:

reta x:

Retas paralelas possuem coeficientes angulares iguais ⇒ mₐ=mₓ

(-4,-2)

∴
y=3/4x+1
From the circle geometry theorem, a tangent to a circle makes 90° angles with the radius of the circle.
RQ is perpendicular to QP
Triangle RQP is a right-angled triangle
by Pythagoras theorem

units (rounded to one decimal place)
Answer:
120
Step-by-step explanation:
solve for x then substitute