Answer:
Answer is a
Step-by-step explanation:
Y=-3x-11. you add the one to the other side making the equation y=-3(x+4)+1
then you distribute making it y=-3x-12+1
Answer:
400 megabytes of data used will make the cost from either company equal.
Step-by-step explanation:
Given that:
Per month charges of Company A = $80
Charges of 100 MB = $5 = 
Let,
x be the number of MBs consumed.
y be the total charges.
y = 0.05x+80
Per month charges of Company B = $60
Charges of 100 MB = $10 = $0.1 per MB
y = 0.1x+60
For equal charges;
0.05x+80 = 0.1x + 60
80-60 = 0.1x-0.05x
20 = 0.05x

Hence,
400 megabytes of data used will make the cost from either company equal.
That is highest to lowest value of y
we know the range of y=cos x is -1 to 1
so
we multiply it by 3
-3 to 3 is the range