y = -x + 5
Slope of this line = - 1.
Slope of the line that is perpendicular is negative reciprocal.
For example if slope= a/b, then slope of the perpendicular line = -b/a.
For our line, the slope is going to be -(-1)=1.
y=mx +b
m=1
y=x+b
We need to find b. We are going to use point (5, -1).
y = x +b
-1 = 5 + b
b= -6
So,
y= x - 6
Answer is A.
Since it is 73% less we need to do 100-73=27. this means that 27% of the original price is left. so we must devide 221.40 by 27% to find what 1% of original price was = 8.2 . so $8.2 is 1% of original price, therefore the original price is 8.2×100 = $820
Answer:
Therefore solution for a is
Step-by-step explanation:
Given:
7a - 2b = 5a + b
To Find:
a = ?
Solution:
7a - 2b = 5a + b .................Given
First take all the 'a' terms to the left hand side and 'b' terms to the right-hand side of the equation,
∴ 
Now dividing by 2 on both the side we get
∴ 
Therefore solution for a is
