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IRINA_888 [86]
4 years ago
14

in the xy-plane, the line x + y=k, where k is a constant, is tangent to the graph of y=x^2+3x+1. What is the value of k?

Mathematics
1 answer:
Inga [223]4 years ago
6 0
Slope of tangent line = dy/dx = 2x + 3

2x + 3 = -1
x = -2
y = -2^2 + 3 (-2) + 1 = -1

Tangent line passed through point (-2 , 1)
k = x + y
k = -2 - 1
k = -3

hope this helps
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3 years ago
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4 0
3 years ago
Please help guys! Using the function f(x) = 3x – 5, what would the output be for an input of 4?
Lelechka [254]

Answer:

Output = 7

Step-by-step explanation:

Input value...is the value of x and the output value..is the value of y,

So the question is just saying that what is the value of y when x = 4

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4 0
3 years ago
Read 2 more answers
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Vsevolod [243]
Just combine these.

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x = 6 
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5 0
4 years ago
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