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Paul [167]
3 years ago
10

.Use the linear combination method to solve the system of equations. –3x + 8y = 16 3x + 4y = 8 What is the value of x?

Mathematics
2 answers:
guapka [62]3 years ago
6 0

Answer:

The value of x is 0

Step-by-step explanation:

The given equations are

-3x+8y=16...(1)

3x+4y=8...(2)

We add the equattion (1) and equation (2) to obtain;

0x+12y=24

\Rightarrow y=\frac{24}{12}

\Rightarrow y=2

We put y=2 into equation (2) to obtain;

3x+4(2)=8

\Rightarrow 3x+8=8

\Rightarrow 3x=8-8

Simplify

\Rightarrow 3x=0

Divide through by 3.

\Rightarrow x=0

The solution to the system is

(0,2)

The x-value is 0

lys-0071 [83]3 years ago
5 0

Answer:

0

Step-by-step explanation:

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8 9 10 11 12 13 14 15 16 17 18 19 20You and two friends (Adam and Alana) wonly play a game if it is fair for all three of you. T
pav-90 [236]
Well I don't know ! 
Let's take a look and see:

The idea is that there could be more than one way
for a roll of the dice to land with the same number.  

-- If the sum is from 1-4, you get the point.
There are  6  different ways for a roll of the dice to come up 1-4.

-- If the sum is from 5-8, Adam gets the point.
There are  20  different ways for a roll of the dice to come up 5-8.

-- If the sum is 9-12, Lana gets the point.
There are  10  different ways for a roll of the dice to come up 9-12.

-- The game is not fair to all three of you.
-- Lana has a distinct advantage over you.
-- Adam has a big advantage over Lana.
-- Adam has an even bigger advantage over you.
-- You are at a big disadvantage.  (Notice that one of your
numbers ... 1 ... can never come up unless one of the dice
falls off of the table.)
_______________________________

Here's how to figure it:

Ways to roll a 2:
1 ... 1

Ways to roll a 3:
1 ... 2
2 ... 1

Ways to roll a 4:
1 ... 3
2 ... 2
3 ... 1

Ways to roll a 5:
1 ... 4
2 ... 3
3 ... 2
4 ... 1

Ways to roll a 6:
1 ... 5
2 ... 4
3 ... 3
4 ... 2
5 ... 1

Ways to roll a 7:
1 ... 6
2 ... 5
3 ... 4
4 ... 3
5 ... 2
6 ... 1

Ways to roll an 8:
2 ... 6
3 ... 5
4 ... 4
5 ... 3
6 ... 2

Ways to roll a 9:
3 ... 6
4 ... 5
5 ... 4
6 ... 3

Ways to roll a 10:
4 ... 6
5 ... 5
6 ... 4

Ways to roll 11:
5 ... 6
6 ... 5

Ways to roll 12:
6 ... 6

5 0
3 years ago
Find sinx+cosx if sinx*cosx=3/8
Maurinko [17]

Answer:

^+_-\frac{\sqrt{7}}{2}.

Step-by-step explanation:

1.| \ sinx+cosx| =\sqrt{(sinx+cosx)^2}=\sqrt{sin^2x+2sinxcosx+cos^2x}=\sqrt{1+2sinxcosx};

2) according to the item 1:

sinx+cosx=^+_-\sqrt{1+2*\frac{3}{8}} =^+_-\sqrt{\frac{7}{4}}=^+_-\frac{\sqrt{7} }{2}.

5 0
3 years ago
Rewrite the rational expression with the given denominator -3/q = ?/6q
allochka39001 [22]

Answer:

The answer is -18.

Step-by-step explanation:

Because to find this answer you have to multiply Q by 6 which gives you the denominator 6q. Then to get the numerator you have to multiply -3 by 6 also and that's how you get your answer of -18/6q.

7 0
3 years ago
2 Points
beks73 [17]

Answer:

5 units

Step-by-step explanation:

Length AB,

Just apply the formula;

Length between two points =square root of [(difference in x coordinates)^2 + (difference in y coordinates)^2]

Length AB =square root of [(4 - 7)^2 + (-5 - - 9)^2]

Length AB =square root of [ (-3)^2 + (4)^2]

Length AB = square root of (25)

Length AB = 5 units

6 0
3 years ago
Read 2 more answers
Identify the slope and y-intercept of the given graph.
qaws [65]

Answer:

the slope is -1/2 and the y- intercept is 2

Step-by-step explanation:

math

way

( no space needed)

5 0
3 years ago
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