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2 years ago

Solve the system of equations. 7x−3y=20 y=5x−4 x= y=

Mathematics

2 answers:

Luden [163]2 years ago

8 0

The answer is
x= -1
y= -9

Rama09 [41]2 years ago

3 0

Answer:

{x,y} = {-1,-9}

Step-by-step explanation:

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A manufacturer produces bolts of a fabric with a fixed width. A quantity q of this fabric (measured in yards) that is sold is a

BigorU [14]

Answer:

$R'(20) = 2000$

Step-by-step explanation:

We are given the following in the question:

Quantity, q

Selling price in dollars per yard, p

$q=f(p)$

Total revenue earned =

$R(p)=pf(p)$

f(20)=13000

This means that 13000 yards of fabric is sold when the selling price is 20 dollars per yard.

f′(20)=−550

This means that increasing the selling price by 1 dollar per yards there is a decrease in fabric sales by 550.

We have to find R'(20)

Differentiating the above expression, we have,

$R'(p) = \displaystyle\frac{d(R(p))}{dp} = \frac{d(pf(p))}{dp} = f(p) + pf'(p)$

Putting the values, we get,

$R'(p) = f(p) + pf'(p)\\\\R'(20) = f(20) + 20(f'(20))\\\\R'(20) = 13000 + 20(-550) = 2000$

7 0

3 years ago

Please find the question

melisa1 [442]

Answer:

By distance formula ,

AB² = (5+1)² + (3-6)²

AB² = 36 + 9

AB = 6.71 units

6 0

2 years ago

Are the lines below parallel, perpendicular, or neither?

levacccp [35]

Answer:

<h2>Neither </h2><h2></h2>

2y = 3x - 4

y = 2/3x - 3

Step-by-step explanation:

Parallel means the lines never cross. These two lines cross. Perpendicular means they cross and form a 90° angle.

5 0

2 years ago

Read 2 more answers

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nevsk [136]

19. A
20. C
21. C
22. B
23. B
24. C

4 0

2 years ago

What is this shape?<br> I am doing this for my homework I have 7hrs to do it

liberstina [14]

I think it’s called tromino

7 0

2 years ago

Solve the system of equations. ​7x−3y=20 y=5x−4 ​ x= y=

Solve the system of equations. 7x−3y=20 y=5x−4 x= y=