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frozen [14]
3 years ago
8

Write the equation of the line with the given conditions. passing through (-1, -7) and perpendicular to the line with equation 4

x + 5y = 31
Mathematics
1 answer:
Aleks [24]3 years ago
5 0

Answer:

y = 5/4 x - 23/4

Step-by-step explanation:

4x + 5y = 31

5y = - 4x +31

y = -4/5 x + 31/5

⊥ slope = 5/4

-7 = 5/4 (-1) + B

-28 = -5 + 4b

-23 = 4B

b = -23/4

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Miss lead says that if y varies directly with x and y=15 when x=-3, then y=-20 when x=4. Is she correct? Answer in complete sent
gizmo_the_mogwai [7]

Answer:

Yes,  she is correct.

Step-by-step explanation:

y = kx   is direct variation

15 = k*-3

k = -5.

So the equation of variation is

y = -5x

When x = -4:

y -5*-4 = 20.

6 0
2 years ago
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Lady bird [3.3K]

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3 0
4 years ago
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inna [77]

Answer:

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Step-by-step explanation:

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7 0
3 years ago
If y = -12 when x = 9, find u when x = -4
True [87]

Answer:

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Step-by-step explanation:

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4 0
3 years ago
Can someone please help me with the “Challenge” question??
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Answer:

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