Answer is (b) cause 13 x 2 is 26
He would notice that the numbers are starting at two and increasing by 2 each time. Also, all the numbers are even.
The pattern is that you are simply counting by 2's.
2, 4, 6, 8, 10, 12, ....
You need to set a variable to represent the width, let's say "w'.
width = w
length (l) = 20 + w
Area = length * width
A = (20 + w) * w
See how I substituted the length in terms of w, above? We also know the area, so plug that in:
A = (20 + w) * w
1500 = (20 + w) *w
Solve for w. If it's easier, rewrite as:
1500 = w(20 + w)
Distribute the right side, and solve for w (width).
Then plug back into the equation for length --> length = 20 + w to find the other dimension
Given:
Equation of line is .
A line is perpendicular to the given line and passes through (-3,7).
To find:
The point slope form of the perpendicular line.
Solution:
Point slope form of a line is
...(i)
where, is the point from which the line is passing through and m is slope.
We have,
...(ii)
From (i) and (ii), we get
Product of slopes of two perpendicular lines is -1.
So, slope of perpendicular line is .
Point slope form of the perpendicular line is
Therefore, the correct option is C.