Answer:
See explanation
Step-by-step explanation:
Assuming you are talking about a square of side length
Then we can find the area of the square using
where s is the side length of the square.
We substitute the value to get:
Write exponent as multiplication
Multiply to get:
Therefore the area is 1/25 cm²
Answer:
depends on what the price of the bicycle is and the discount percentage
The unit rate of the dog is 12.5 rolls per minute. So to get your answer multiply this by 6 and you will have a total of 75 rolls.
Multiple 6 with numbers inside paranthesis:
12x - 66 + 15 = 21
add 66 fhen substrack 15 from both sides :
12x = 72 divide both sides with 12:
x = 6
Say you had this problem:
-4x - 2y= -12
4x +8y = -24
First you would have to cancel out one part of the equation to get on variable alone. In this case it's easy it would be -4x and 4x. So then you would cancel those out.
Now we have
-2y= -12
8y =-24
so then you just add them all up
6y=-36
Next you just divide both sides by 6
so then you answer for y would be -6.
Next you would choose one of your equations and plug the -6 in.
So it would be
-4x -2 (-6) =-24
So you would times negative 2 by negative 6, which would be positive 12. Since a negative times a negative equales a positive.
-4x + 12= -24
Next you would minus 12 on both sides.
-4x + 12=-24
- 12 = -12
The 12's would cancel out and then you just minus -24 by -12 which you would ended up just plusing them together because a negative plus a negative equales a negative. Or a negative minus a negative number would end up adding them up.
-4x= -36
Next you would get x alone and how you would do that is you would divide -4 in both sides which would cancel them -4 out then it would be divided by -36.
So it would look like this.
-4x= -36
-4 -4
So negative 36 divided by negative 4 is 9.
So your final answer would be
y= -6
x= 9
I hope I explained to you properly how to do systems of equations by elimination.
