The r variable outside the parentheses can multiply both the numbers in the parentheses.
This called distributing the r. We are using the distributive property.
The distributive property states that a(b + c) = ab + ac.
r(18 - 3) = 18r - 3r
So, (r * 18) - (r * 3) is the answer.
Change x+y=5 to y=5-x
x+5-x=-3
0=-8
The answer is no solution. :)
Answer:
Calculating two points and drawing the line between the two.
Explanation:
To find the y-intercept, put x = 0
y = 2 (0) - 1
y = -1
To find the x-intercept, put y = 0
2x - 1 = 0
2x = 1
x = 1/2
Draw your system of axis. Mark -1 on the y-axis, and 1/2 on the x-axis.
Now draw a line through these two ponts. Add arrows.
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To draw the graph by using points,
let x = -1, then y = 2 (-1) - 1 = -2 - 1 = -3
first point is (-1; -3)
Let x = 0, y = 2 (0) - 1 = -1
Second point is (0; -1)
Let x = 1, y = 2(1) - 1 = 1
Third point is (1; 1)
Plot the three points and draw a line through them. Add arrows to your line.
The answer to the selected math problem is 10
