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Ksivusya [100]
2 years ago
7

The slope formula can be used to find the slope, m, of a line with points (L1, y1) and (22, 42).

Mathematics
1 answer:
Helga [31]2 years ago
4 0

Answer: (y-y_1)=m(x-x_1)\ or \ (y-y_2)=m(y-y_2)

Step-by-step explanation:

Point slope form: (y-b)=n(x-a) , where n=slope , (a,b) is the point through which line passes.

If slope of the line = m and line passes through (x_1,y_1) and (x_2,y_2) :-

(y-y_1)=m(x-x_1)\ or \ (y-y_2)=m(y-y_2)

So, the equivalent equations are :

(y-y_1)=m(x-x_1)\ or \ (y-y_2)=m(y-y_2)

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Find the measurements (the length L and the width W) of an inscribed rectangle under the line with the 1st quadrant of the x &am
Leni [432]

The question is incomplete. Here is the complete question.

Find the measurements (the lenght L and the width W) of an inscribed rectangle under the line y = -\frac{3}{4}x + 3 with the 1st quadrant of the x & y coordinate system such that the area is maximum. Also, find that maximum area. To get full credit, you must draw the picture of the problem and label the length and the width in terms of x and y.

Answer: L = 1; W = 9/4; A = 2.25;

Step-by-step explanation: The rectangle is under a straight line. Area of a rectangle is given by A = L*W. To determine the maximum area:

A = x.y

A = x(-\frac{3}{4}.x + 3)

A = -\frac{3}{4}.x^{2}  + 3x

To maximize, we have to differentiate the equation:

\frac{dA}{dx} = \frac{d}{dx}(-\frac{3}{4}.x^{2}  + 3x)

\frac{dA}{dx} = -3x + 3

The critical point is:

\frac{dA}{dx} = 0

-3x + 3 = 0

x = 1

Substituing:

y = -\frac{3}{4}x + 3

y = -\frac{3}{4}.1 + 3

y = 9/4

So, the measurements are x = L = 1 and y = W = 9/4

The maximum area is:

A = 1 . 9/4

A = 9/4

A = 2.25

6 0
3 years ago
The difference of the quotient m and 9 and the quotient of n and 30
Zanzabum
Answer: (30m-9n)/270

First we start with m/9-n/30.

We multiply the denominators to get 270.

Then we multiply the numerators by the original denominators to get (30m-9n).

To check, we can use m=2, and n=4

2/9-4/30=4/45

(30*2-9*4)/270=24/270=4/45
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2 years ago
A satellite cable company charges an installation fee of $50 plus an additional $35.95 per month for service.
wolverine [178]
My answer would be 85.95
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SOVA2 [1]
Let m and s be the number of math and sociology books sold respectively.

m=s+88 we are also told that:

m+s=426, using m found above in this equation gives you:

s+88+s=426 combine like terms on left side

2s+88=426  subtract 88 from both sides

2s=338  divide both sides by 2

s=169, since m=s+88

m=169+88=257

So 257 math and 169 sociology textbooks were sold.
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3x + 2y = 12<br> -x + 5y = 13<br> Solve by elimination <br> Y and x
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Answer:

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Step-by-step explanation:

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