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ryzh [129]
3 years ago
12

Write an equation in point-slope form for the line that passes through

Mathematics
1 answer:
Charra [1.4K]3 years ago
6 0

Answer:

Point-slope form:

y-5= -1/3 times (x+9)

This is only for the first part

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Erify that f has an inverse. then use the function f and the given real number a to find (f −1)'(a). (hint: see example 1. if an
zhannawk [14.2K]

The function

... f(x) = (x+2)/(x-1) = 1 + 3/(x-1)

is symmetrical about the line y=x, hence is its own inverse.


We can evaluate the desired derivative directly.

... f'(x) -3/(x-1)²

so f'(2) is

... f'(2) = -3/(2-1)²


(f^{-1})(2)=-3

8 0
3 years ago
A rectangular wall has length 3 less than 4 times the width . I wish to put a silver line along the corners of the wall. The lin
Thepotemich [5.8K]

Answer:

Step-by-step explanation:

Let width = w units

Length = 4w - 3

Cost for lining corners of wall = $ 18.50

Perimeter of the wall = 18.50/0.25 =  74 ft

2*(length  +width ) = 74

2*(4w - 3 + w) =74

2*(5w - 3) =74

10w - 6 = 74   {Add 6 to both sides}

10w - 6 + 6 = 74 + 6

10w = 80

Divide both sides by 10

10w/10 = 80/10

w =  8 ft

Length = 4w - 3 = 4*8 - 3 = 32 - 3

Length = 29 ft

Area of the wall = length * width

                           = 29 * 8

                           =  232 square ft

Cost of painting the wall per square feet = 20 cents = 0.20

Cost of painting 232 square feet = 232 * 0.20

                                                             = $ 46.40

4 0
3 years ago
Help please
melamori03 [73]

Hey There!

Answer:

D. 28

Explanation:

So all you have to do in your answer is evaluate:

-(-28)

= 28

= D. 28

Therefore, that is how you found your answer.

Hope this Helps!

3 0
3 years ago
Read 2 more answers
Give an estimate of the mean hardness that you would expect after 37 and 41 hours; and a 85% confidence interval for each estima
Jlenok [28]
The predicted value of hardness at 37 hours is 243.87 and an 85% confidence interval for the mean hardness is (242.12, 245.61). At 41 hours, the predicted hardness is 252 and an 85% confidence interval for mean hardness is (249.83, 254.18). The confidence interval for X is equals to 41 which is wider because the value 41 is farther away from the sample mean X than is 37. As an outcome, the standard error for the prediction is larger.
4 0
3 years ago
Someone please go through this with me I beg, I will award brainiest! Maths homework due in for the 8th.. ;((
enot [183]

Essentially, you're going to want to reverse the steps on x in order to isolate it from the rest of the variables. To do this, perform inverse operations on x. The first one of these is the multiplication of x and m, so divide both sides by m to cancel m out on the right side. Now we have y/m = x + b. The final thing to do in order to isolate x is to subtract b from both sides. This yields us y/m - b = x. This can be rearranged into x = y/m - b, which should be your answer.


6 0
3 years ago
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