Multiple choice answers go in this order:
B
C
A
Step-by-step explanation:
length = breadth + 5
the perimeter is a rectangle is
2×length + 2×breadth
in our case
2×length + 2×breadth = 74
so, we use the first equation in the second equation :
2×(breadth + 5) + 2×breadth = 74
2× breadth + 10 + 2× breadth = 74
4×breadth = 64
breadth = 16 m
length = breadth + 5 = 16 + 5 = 21 m
If it was 25% off, then she paid 75% for it
75% of the original price is 170
0.75x = 170
x = 170 / 0.75
x = 226.67 <== original price
In the first row of an augmented matrix, we put all the slope constants there.
[3/4
[-8
We have no terms for the next column, so we'll put 1's there.
[3/4 1
[-8 1
Finally, we put the y intercepts in the last column.
[3/4 1 | -6]
[-8 1 | 2] (Choice B, Choice 2)
:)
8-3 = 5
5^2 = 25
5-2 = 3
3^2 = 9
25-9=16
Hope this helps
