Answer:
X=-7
Step-by-step explanation:
distribute
-3x-6=15
simplify
-3x-6+6=15+6
-3x=21
3x=-21
x=-7
162 think of a square like a pool both sides have to be the same
Answer:
170x+240y<2000
Step-by-step explanation:
sunrise- 170x
twilight- 240y
both of them added together has to equal/ be less than 2000
since i can't do the less than or equal to sign you will have to pretend there is a line under the < sign
<
_
Answer:

which agrees with the first choice (A) in your list of possible answers
Step-by-step explanation:
Notice that the area of the outer square is given by the square of it side
.Then the outer area is given by: 
Now, the inner square's area we calculate by subtracting from the outer area four equal right angle triangles (those shaded in grey in the figure provided). Each of such right angle triangles have an area given by the general formula of a triangle's area:

Therefore the internal square's area is:

And then the quotient of this are over the larger square area becomes:

This is hard to solve when we don't know the visual graph this question is trying to refer from