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3 years ago

24 PTS!!!!!!1

Mathematics

1 answer:

balandron [24]3 years ago

8 0

Answer:

D (7, 0.5)

Step-by-step explanation:

The equations must be interpreted to be ...

y = -1/2x +4
y = 1/2x -3

A graph shows the solution to be (7, 0.5), matching selection D.

___

You can add the two equations together to get ...

(y) +(y) = (-1/2x +4) + (1/2x -3)

2y = 1 . . . . . simplify

y = 1/2 . . . . .divide by 2

It can be convenient to use the second equation to find x.

1/2 = 1/2x - 3

1 = x - 6 . . . . . . multiply by 2

7 = x . . . . . . . . . add 6

The solution is (x, y) = (7, 0.5). . . . . matches selection D.

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Use substitution. 2x +3y = -5 4x+3y= 17

Goshia [24]

Answer:

Step-by-step explanation:

-2x -3y = 5

4x + 3y = 17

2x = 22

x = 11

4(2) + 3y = 17

8 + 3y = 17

3y = 9

y = 3

(11,3)

3 0

3 years ago

Read 2 more answers

In 2003 Exxon Mobil received a contract from the government worth $756,733 while Aerospace received a contract from the governme

lutik1710 [3]

The combined total of their contracts is $1,296,250

<h3>How to determine the combined total?</h3>

The values of the contracts are given as:

Exxon Mobil= $756,733
Aerospace = $539,517

The combined total is represented as:

Total = Exxon Mobil + Aerospace

Substitute known values

Total = $756,733 + $539,517

Evaluate the sum

Total = $1,296,250

Hence, the combined total of their contracts is $1,296,250

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brainly.com/question/4916384

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4 0

2 years ago

The value of 5/32 divided by 25/4

weqwewe [10]

Answer:

1/40

Step-by-step explanation:

7 0

3 years ago

Describe the differences between a parabola that has a horizontal directrix and a parabola that has a vertical directrix.

Readme [11.4K]

A parabola that has a horizontal directrix is a parabola that opens up or down.

Here are some of its components:
1) Standard equation of a parabola with a horizontal directrix: (x-h)^2 = 4a(y-k),
a = distance from vertex to focus
2) Vertex at (h,k)
3) Focus(h,k+a)
4) Directrix: y = k-a
5) Axis of symmetry: x = h

A parabola that has a vertical directrix opens to the right or left and is on its side.

Here are some components
1) Standard equation of a parabola with a vertical directrix: (y-k)^2 = 4a(x-h)
2) vertex (h,k)
3) focus (h+a,k)
4) directrix: x = h-a
5) Axis of symmetry: y = k

Hopes this helps :)

4 0

3 years ago

Work out the surface area of a cylinder when the height = 18cm and the volume = 1715cm cubed

lara [203]

Answer:

813.4 cm² (nearest tenth)

Step-by-step explanation:

Volume of a cylinder

$\sf V=\pi r^2 h \quad\textsf{(where r is the radius and h is the height)}$