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Shtirlitz [24]
3 years ago
6

X=5-3Y X=2Y-10 Whats the answer

Mathematics
2 answers:
Scrat [10]3 years ago
8 0
Y=3

x=-4

you have to use substitution. so instead of the equations having two variables, they will now have one. 

5-3y=2y-10    after solving for y, plug the answer in any of the equations and you will find x.
prohojiy [21]3 years ago
6 0
X = 5 - 3y
x = 2y - 10

5 - 3y = 2y - 10
<u>  + 3y + 3y        </u>
       5 = 5y - 10
  <u>+ 10        + 10</u>
     <u>15</u> = <u>5y</u>
      5      5
       3 = y
x = 2y - 10
x = 2(3) - 10
x = 6 - 10
x = -4
(x, y) = (-4, 3)
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Tickets to a concert cost $24 before a 5% fee is added.How much are the tickets with the fee?
vagabundo [1.1K]

Answer:

$25.20

Step-by-step explanation:

10%= 2.4 because you divide 24 by 10

So 5%= half 2.4= 1.2

24+1.2=25.20

5 0
3 years ago
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How can you determine if you need to use a combination or permutation to count the number of outcomes? Which will usually have m
Nadya [2.5K]

Answer with Step-by-step explanation:

Permutation : It is an arrangement of r elements out of n elements.

Combination : it is a selection of r element out of n elements .

Suppose we have a set

S={1,2,3}

If two elements are taken at a time then

Using permutation formula

Total number of outcomes=3P_2

Total number of outcomes=\frac{3!}{(3-2)!}

Total number of outcomes=3!=3\times 2\times1=6

Using combination formula

\binom{n}{r}=\frac{n!}{r!(n-r)!}

Total number of outcomes=\binom{3}{2}=\frac{3!}{2!1!}

Total number of outcomes=\frac{3\times2!}{2!}

Hence, total number of outcomes=3

Total number of outcomes determined by permutation have more outcomes.

Because permutation is an arrangement of elements  therefore, it consider order of arrangement of element   but combination is a selection of elements it does no consider order of elements

Arrangements of two elements out of 3 elements

{1,2},{2,3},{2,1},{3,2},{1,3},{3,1}

By using combination if two elements taken at a time then combination

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4 0
3 years ago
Which equation gives the number of 1/4 centimeter that are in 7/8 centimeter?
lesya692 [45]
The answer is B.

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Find the slope and the y-intercept of the graph of the linear equation. Then, graph the equation.
avanturin [10]

Answer:

The slope of the graph is: m = -6

The y-intercept of the graph is: b = 2

And the graph of the equation is shown below.

Step-by-step explanation:

We know that the slope-intercept form is

y=mx+b

Where m is the slope and b is the y-intercept

Given the equation

y=-6x+2

comparing with the slope-intercept form

slope = m = -6

y-intercept = b = 2

Thus,

The slope of the graph is: m = -6

The y-intercept of the graph is: b = 2

And the graph of the equation is shown below.

7 0
2 years ago
Solve the system 6x -2y+z= -2 2x+ 3y - 3z =11 x+ 6y=31
weqwewe [10]

Answer:

x = 1

y = 5

z = 2

Step-by-step explanation:

System of equations:

6x - 2y + z = -2

2x + 3y - 3z = 11

x + 6y = 31

Isolate one variable in any of the equations:

x + 6y = 31

x = 31 - 6y

Plug in this value for x in another equation:

6(31 - 6y) - 2y + z = -2

186 - 36y - 2y + z = -2

186 - 38y + z = -2

-38y + z = -188

z = -188 + 38y

Plug in these values in the remaining equation:

2(31 - 6y) + 3y - 3(-188 + 38y) = 11

62 - 12y + 3y + 564 - 114y = 11

626 - 12y + 3y - 114y = 11

626 - 9y - 114y = 11

626 - 123y = 11

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y = 5

Plug in value of y into our other answers to solve for x and z:

x = 31 - 6(5)

x = 31 - 30

x = 1

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z = -188 + 190

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Check your work:

6x - 2y + z = -2

6(1) - 2(5) + 2 = -2

6 - 10 + 2 = -2

-4 + 2 = -2

-2 = -2

Correct!

*Note there are several ways to solve for these types of problems. I used substitution*

8 0
2 years ago
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