#6
x^2 = 1
x = - 1 and x = + 1
#7
a^2 + 1 = 19
a^2 =18
a^2 =√ 9 <span>√ 2
a = + 3</span>√ 2 and a = - 3<span>√ 2</span>
This is my answer.I hope this is useful.
Answer:
ED ≈ 2.6 units
Step-by-step explanation:
Using the Sine rule in Δ DEF
= 
=
( cross- multiply )
ED sin115° = 6.95 sin20° ( divide both sides by sin115° )
ED =
≈ 2.6 ( to the nearest tenth )
Step-by-step explanation:
carlo couldve scored 3 or 4