,178. in my head not edtinstoon
Answer:
n = 6
Step-by-step explanation:
Step 1: Write equation
-15 + n = -9
Step 2: Add 15 to both sides
n = 6
Step 3: Check
<em>Plug in n to verify it's a solution.</em>
-15 + 6 = -9
-9 = -9
X - 42 is a straight vertical line passing through -42 on the x-axis ( point -42,0)
so the slope is infinite .
Another line with same slope and parallel to it would be x = 36.
A horizontal like with slope 0 is perpendicular to it It would have equation y any number so y = 6 would be an example.
X / -2 = -4...multiply both sides by -2
x = -4 * -2
x = 8
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7a - 89 = 72
7a = 72 + 89
7a = 161
a = 161/7
a = 23 <==
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5x - 2 = 18
5x = 18 + 2
5x = 20
x = 20/5
x = 4 <==