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creativ13 [48]
3 years ago
5

Graph the line for y+1=−3/5(x−4) on the coordinate plane.

Mathematics
2 answers:
Naddika [18.5K]3 years ago
6 0
Please enclose that -3/5 in parentheses:  <span>y+1= (−3/5)(x−4)
</span>
Let's use the intercept method to graph this line.
First, set x = 0 and find y; this y will be the y-coordinate of the vertical intercept:

y+1= (−3/5)(0−4)  =>  y = -1 + 12/5 = -5/5 + 12/5 = 7/5.  Plot (0, 7/5).

Next, set y = 0 and find x; this will give us the coordinate of the horiz. int.:

0+1= (−3/5)(x−4) => -5/3 = x - 4, or x = 4- 5/3, or  x = 7/3.  Plot (7/3, 0).

Now draw a straight line thru these two points.

skad [1K]3 years ago
5 0

Answer:

See the graph.

Step-by-step explanation:

We have a point-slope equation

y+1=-\frac{3}{5} (x-4)

Point-slope is a specific form of linear equations in two variables:

y-b=m(x-a)

When an equation is written in this form, m gives the slope of the line and (a, b) is a point the line passes through.

Slope is a measure of the steepness of a line.

We can tell that the corresponding line passes through (4, -1) and has slope of -\frac{3}{5}. Now we can graph the line:

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Answer:

The number of elephant ears that must be sold to maximize profit is 400.

Step-by-step explanation:

Given that,

The profit that a vendor makes per day is given by

P(x)= - 0.004x² +3.2 x -200

where x is number of elephant ears.

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Again differentiating with respect to x

P''(x) = -0.008

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Since at x=400, P''(x)<0, the profit is maximize.

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