Answer:
We can use quadratic formula
a=3, b= -1, c=4
Step-by-step explanation:
∠LQK+∠GQL=90º
Therefore:
(4n-15)+(3n)=90
7n=90+15
7n=105
n=105/7
n=15
∠LQK=4n-15=4(15)-15=60-15=45
Answer: ∠LQK=45º
We have the following:

therefore, the answer is 3.35 x 10^6
Answer: - x - 120
Explanation: You want to find the opposite of (120-x) not just x, so you just put the negative symbol next to both the variables.