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Salsk061 [2.6K]
2 years ago
11

PLEASE HELP.

Mathematics
1 answer:
mars1129 [50]2 years ago
4 0

Answer:

3: 1/4 4:1/2 5: 27/32 6: 1/5 7: 1/6 8: 5/6

Step-by-step explanation:

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I need answers to this
ololo11 [35]

Answer:

x = -5, and y = -6

Step-by-step explanation:

Suppose that we have two equations:

A = B

and

C = D

combining the equations means that we will do:

First we multiply both whole equations by constants:

k*(A = B) ---> k*A = k*B

j*(C = D) ----> j*C = j*D

And then we "add" them:

k*A + j*C = k*B + j*D

Now we have the equations:

-x  - y = 11

4*x - 5*y = 10

We want to add them in a given form that one of the variables cancels, so we can solve it for the other variable.

Then we can take the first equation:

-x  - y = 11

and multiply both sides by 4.

4*(-x - y = 11)

Then we get:

4*(-x - y) = 4*11

-4*x - 4*y = 44

Now we have the two equations:

-4*x - 4*y = 44

4*x - 5*y = 10

(here we can think that we multiplied the second equation by 1, then we have k = 4, and j = 1)

If we add them, we get:

(-4*x - 4*y) + (4*x - 5*y) = 10 + 44

-4*x - 4*y + 4*x - 5*y = 54

-9*y = 54

So we combined the equations and now ended with an equation that is really easy to solve for y.

y = 54/-9 = -6

Now that we know the value of y, we can simply replace it in one of the two equations to get the value of x.

-x - y = 11

-x - (-6) = 11

-x + 6 = 11

-x = 11 -6 = 5

-x = 5

x = -5

Then:

x = -5, and y = -6

5 0
3 years ago
Find the area of a circle whose circumference is 31.4 centimeters. (Pi form) {FREE BRAINLIEST]
vagabundo [1.1K]

Answer:

78.46 cm^2

Use area formula

6 0
3 years ago
Read 2 more answers
If it takes a hoses to fill a tank in b minutes, how many hoses will it take to fill it in c
forsale [732]
In the terms it’s none of them because this is way to confusing
8 0
2 years ago
This graph represents a proportional relationship between the number of months, x, data is used on a cell phone and the total co
valentinak56 [21]

Answer:

The equation that represents the graph is y = 40x

The new equation would be y = 45x

Step-by-step explanation:

As y increases by 40, x increases by 1, so 40/1, or 40

New equation: $90 per 2 months, y = 90, x = 2, 90/2 = 45

3 0
3 years ago
Please help!!!!!!!!!!!!!!!
tamaranim1 [39]

Answer:

(y¹-y¹/x¹-x¹)

8-11/10-19

-3/-9

1/3

Step-by-step explanation:

1/3 or one-third is your answer!

7 0
2 years ago
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