Answer:
Each answer is negative
Each equation has a four within it, either negative or positive
Step-by-step explanation:
-4x3=-12
3x-4=-12
5x-4=-20
Answer:
It'd be easist if one of the variables was by itself
Step-by-step explanation:
I.E: y=2x+4 and 2y+x=23
Answer:
6x=100+80
6x=180
x=180÷6
x=30
so we have to work for 30 hours to can buy the CD player and still have $ 80.
Answer:
The length of other wall is 3 meters.
Step-by-step explanation:
Given that:
Length of one wall = 4 meters
Length of diagonal from one corner to opposite corner = 5 meters
As the room is rectangular, the diagonal will form a right angled triangle.
The diagonal will be the hypotenuse.
Using pythagorean theorem;

Here,
a = 4 and c = 5

Taking square root on both sides

b = 3 meters
Hence,
The length of other wall is 3 meters.
Answer: 1320; 495
Step-by-step explanation:
Explanation is in the attachment file