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Inga [223]
3 years ago
7

Use substitution to solve each system. 2y - 8 = 6x y = 3x + 2

Mathematics
2 answers:
Olegator [25]3 years ago
8 0
It looks like the problem you have displayed has no possible solutions.
lutik1710 [3]3 years ago
7 0
2y - 8 = 6x

2(3x + 2) - 8 = 6x

6x + 4 - 8 = 6x

6x - 4 = 6x

-4 = 0

this system has no solutions 
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A closed cylindrical can of fixed volume V has radius r.a) Find the surface area, S, as a function of r.b) What happens to the v
andrey2020 [161]

Answer:

Step-by-step explanation:

This question is incomplete; here is the complete question.

A closed cylindrical can of fixed volume V has radius r. (a) Find the surface area, S, as a function of r. (b) What happens to the value of S approaches to infinity? (c) Sketch a graph of S against r, if  V=10 cm³.

A closed cylindrical can of volume V is having radius r and height h.

a). Surface area of a cylinder is given by

S = 2(Area of the circular sides) + Lateral area of the can

S = 2πr² + 2πrh

S = 2πr(r + h)

b). Since surface area is directly proportional to radius of the can

S ∝ r

Therefore, when r approaches to infinity (r → ∞)

c). If V = 10 cm³ Then we have to graph S against r.

From the formula V = πr²h

10 = πr²h

h = \frac{10}{\pi r^{2}}

By placing the value of h in the formula of surface area,

S = 2\pi r(r+\frac{10}{\pi r^{2}})

Now we can get the points to plot the graph,

r       -2             -1         0       1            2

S    -13.72     -13.72     0    26.28    35.13

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3 years ago
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Brilliant_brown [7]
It’s b and d ? Both of those equations are the same if u haven’t noticed
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ki77a [65]

Answer:

(2,4)

Step-by-step explanation:

When graphed the lines intersect at point (2,4) which is the solution.

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Step-by-step explanation:

I think it three sometimes it's a trick question  

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