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n200080 [17]
3 years ago
12

Evaluate each function. k(n) = n2 – 4; Find k(–7)

Mathematics
1 answer:
Greeley [361]3 years ago
8 0

Answer:

Step-by-step explanation:

hello :

k(n) = n2 – 4

k(–7)=(-7)² – 4 = 49 -4 = 45

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Is the relationship shown by the data linear? If so, model the data with an equation.
zhenek [66]

Answer:

Therefore the equation of the line through ( -7 , 5 ) and ( -5 , 9) is

Linear Relationship i.e y-5=2(x+7)

Step-by-step explanation:

Given:

Let,

point A( x₁ , y₁) ≡ ( -7, 5 )  

point B( x₂ , y₂) ≡ (-5, 9)  

To Find:

Equation of Line AB =?

Solution:

Equation of a line passing through Two points A( x₁ , y₁) and B( x₂ , y₂)is given by the formula

(y - y_{1} )=(\frac{y_{2}-y_{1} }{x_{2}-x_{1} })\times(x-x_{1}) \\

Substituting the given values in a above equation we get

(y-(5))=(\frac{9-(5)}{-5--7})\times (x--7)\\ \\(y-5)=\frac{4}{2}(x+7)\\\\y-5=2(x+7)...............\textrm{which is the required equation of the line AB}

Therefore the equation of the line through ( -7 , 5 ) and ( -5 , 9 ) is

Linear Relationship i.e y-5=2(x+7)

4 0
3 years ago
The temperature of a city during a week was 35°C, 34°C, 36°C, 38°C, 40°C, 39°C and 44°C. What was the average daily temperature
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