Answer:
x = -2bm/(m²+1)
Step-by-step explanation:
One line has equation
... y = mx + b
The slope of the perpendicular line is the negative reciprocal of the slope of the original line. The perpendicular line with the opposite y-intercept has equation
... y = (-1/m)x - b
The point of intersection is where the x- and y-values are equal, so ...
... mx + b = (-1/m)x - b
... (m +1/m)x = -2b . . . . . . . add 1/m - b to both sides
... (m²+1)x = -2bm . . . . . . . multiply by m
... x = -2bm/(m²+1) . . . . . . divide by the coefficient of x
Answer:
4 miles
Step-by-step explanation:
In 7 minutes he runs 1 mile
So in 28 minutes he runs 4 miles
<u>How did I get this answer?</u>
7×4=28
So 1×4=4
In ratios, when you times anything by something, you must do the same to the other part of the ratio.
Answer:
2
Step-by-step explanation:
2 - 1 1
------ = ----- = 2
1 - 1/2 .5
Answer:
yes
Step-by-step explanation:
