Answer:
45⁰
Step-by-step explanation:
We need to find n first.
we are given that GQH is 90⁰ which means that the sum of GQL and LQK should 90⁰ because these are angles on a straight line which adds up to 180⁰.
so,
(4n-15) + 3n = 90⁰
Take the -15 to the other side after opening the brackets.
4n + 3n = 90⁰ + 15
7n = 105⁰
Divide it by 7 for both sides.
n = 15⁰
Now substitute n=15⁰ in you LQK equation.
4n -15
(4×15) -15
60⁰ - 15
45⁰
