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r-ruslan [8.4K]
3 years ago
9

What is the equation of a line that goes through the point (3, 12) and is perpendicular to the line given by the equation y = -1

/3x - 7?
y = -3x - 12
y = -1/3x + 6
y = 3x + 3
y = (1/3x) - 6
Mathematics
1 answer:
Gnoma [55]3 years ago
7 0
Y=3x+3

Perpendicular lines have the product of their gradients =-1
since gradient of line 1 =-1/3
then  gradient of line 2 is
-1/3*m=-1
m=3
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A repair bill for a car is $648.45. The parts cost $265.95. The labor cost is $85 per hour. Write and solve an equation to find
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Answer:

( t - p ) /  85x =  h

( t - 265.95 ) /  85x  = h

648.45 - 265.95 / 85x = 3.32h

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Therefore ( t - p ) /  85x =  3.32

Step-by-step explanation:

648.45 - 265.95

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Finding equation to find hours can be shown as

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How we found equation to find total

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Labour = 85x  = 17 (5 + x)

Equation = 17(5+ x) + 14(19) - 5/100 = 648.45 where x = 85

Equation = ( 85x x 3  1/3) + 265 - 19/20 = t

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