Answer:
A=12 B= 9
Step-by-step explanation:
I thought that was all one equation lol this is very simple just plug in -3 for x
which is -3^2-3 which is -12
The measure of ∠1 is 125° .
Answer: b) 6
Step-by-step explanation:
Given : The illuminance of a surface varies inversely with the square of its distance from the light source.
i.e. for d distance and l luminance , we have
, where k is constant. (1)
If the illuminance of a surface is 120 lumens per square meter when its distance from a certain light source is 6 meters.
From (1), we have
(2)
For the distance (d) corresponds to the illuminance to 30 lumens per square meter , we have

Put value of k , we get

Then , the number of meters should the distance of the surface from the source be increased= 12 meters- 6 meters = 6 meters.
Answer:
I think it is B I am sorry if wrong