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VladimirAG [237]
2 years ago
10

Fill in the other coordinate for the line 7x - 5y =21:(4 , ?)

Mathematics
1 answer:
inessss [21]2 years ago
7 0
<span>7x - 5y =21
-7           -7
5y  =     14
----        -----
5            5
y=   2.8
(4,2.8)</span>
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300 hotdogs and hamburgers total. Hotdogs cost $2. Hamburgers cost $3. How many hamburgers? How many hotdogs?
kompoz [17]

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Step-by-step explanation:

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What is the answer to this? will give brainiest. <br> −3 1 6÷−1 4 9 =
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Answer ASAP. Please give correct answer. (Involves a bunch of circles and trig identities)
iren [92.7K]

Answer:

45.40

Step-by-step explanation:

First of all, the shape of rope is not a parabola but a catenary, and all catenaries are similar, defined by:

y=acoshxa

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a+30=acoshd2a(1)

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s=asinhx2a−asinhx1a

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80=2asinhd2a

40=asinhd2a(2)

You have to solve the system of two equations, (1) and (2), with two unknowns (a,d). It's fairly straightforward.

Square (1) and (2) and subtract. You will get:

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7 0
3 years ago
Use elimination to determine which ordered pair is the solution to the system of equations below. Use the space below to show al
lidiya [134]

Answer:

in the ordered pair; ( x  = 27/4 , y = 1/4 )

Step-by-step explanation:

Given that:

The system of the equation shown below is:

-2x - 14y = 10

 2x + 2y = 14

We are to use the elimination method to determine the ordered pair.

From the above equation:

-2x - 14y = 10  --- (1)

 2x + 2y = 14   --- (2)

Add both equation 1 and 2 together in order to eliminate x, then we can solve for y first.

-2x - 14y = 10

<u>  2x + 2y = 14       </u>

<u>  0  - 16y = -4        </u>

<u />

- 16 y = - 4

divide both sides by - 16, Then:

-16y /-16 = -4/-16

y = 1/4

Since y = 1/4, Then from equation (2), x will be :

2x + 2y = 14

2x + 2(1/4) = 14

2x + 1/2 = 14

2x = 14 - 1/2

2x = 13.5

x = 13.5/2

x = 27/4

Thus, in the ordered pair; ( x  = 27/4 , y = 1/4 )

6 0
3 years ago
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