Answer:
Slope of line 1 = 3
Slope of line 2 = -3
Slope of line 3 = -1/3
Line 1 and 2 = perpendicular
Line 1 and 3 = perpendicular
Line 2 and 3 = perpendicular
Step-by-step explanation:
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5, 10 ,15
divide each by 5
1,2, 3
so the ratios should be 1,2,3
Metal 1 : divide by 150
1,2,4
Metal 2 divide by 130
1,2,3
Metal 3 divide by 310
1,2,3
Metal 4 divide by 140
1,2,3
Metal 1 is not proportional
Choice A
Answer:
Option D. 
Step-by-step explanation:
Let
x -----> the original price of one game
y ----> the original price of one security programs
Remember that
The total pay with discount is
we have that
Find the total pay without discount
The amount saved is the difference
Answer:
The solution set would be (2, -1)
Step-by-step explanation:
To find the solution set, use the elimination method. You can do this my multiplying the whole first equation by 2 and then adding the two equations together.
6x + 4y = 8
2x - 4y = 8
----------------
8x = 16
x = 2
Now that we have the value of x, solve for y using either equation.
2x - 4y = 8
2(2) - 4y = 8
4 - 4y = 8
-4y = 4
y = -1
