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LenaWriter [7]
2 years ago
13

Please help me I need the answer and work !!!!

Mathematics
2 answers:
nika2105 [10]2 years ago
8 0
X=1, Y=-2. Heres your answer. It should be C
vovikov84 [41]2 years ago
4 0

Answer:

(1, -2)

Step-by-step explanation:

So we can work straight away

The elimination method deals with eliminating one variable so that you can find the other, then substituting that back in to find the one we eliminated originally. So, let's add our two equations together:

    9x - 3y = 15

<u> +  3x + 3y = -3</u>

   12x         = 12

So now that we've reached a new equation, 12x = 12, we can divide both sides by 12 and get that:

x = 1

Substituting this back into the second equation (though you could sub it into either one):

3(1) + 3y = -3

3 + 3y = -3

3y = -6

y = -2

Therefore, x = 1 and y = -2, also represented as (1, -2)

Hope this helps!

You might be interested in
Solve for x.
Ivanshal [37]

Answer:

x = -3.25

Step-by-step explanation:

2/5 = 0.4

0.4x - 0.2 = -2(3/4)

-2(3/4) = -2/1 * 3/4 = -6/4

0.4x - 0.2 = -6/4

Convert to fraction

2/5x - 1/5 = -6/4

Add 1/5 to both sides

-6/4 + 1/5 = -30/20 + 4/20 = -26/20

2/5x = -26/20

Convert to decimal

0.4x = -1.3

-1.3/0.4 = -3.25

x = -3.25

8 0
2 years ago
A physics exam consists of 9 multiple-choice questions and 6 open-ended problems in which all work must be shown. If an examinee
Mariana [72]

Answer:

The questions and problem can be chosen in 1260 ways.

Step-by-step explanation:

Given that, a physics exam consists of 6 open-ended problem and  9 multiple choice questions.

The order of choosing does not matter.

So,we use combination to find ways.

The ways to choose  6 multiple choice from 9 is= ^9C_6

                                                                              =\frac{9!}{6!(9-6)!}

                                                                              =84

The ways to 2 open-ended question from 6  is= ^6C_2

                                                                              =\frac{6!}{2!(6-2)!}

                                                                             =15

Since pick 6 multiple choice out of 9 and 2 open-ended question out of 6 both are independent we have multiply both to find required ways.

Total number of ways is =(84×15)

                                        =1260.

6 0
3 years ago
Wayne's puppy weighs 8 pounds. How many ounces does Wayne's puppy weigh?
Morgarella [4.7K]
1 pound = 16 ounces

8 * 16 = 128 ounces
5 0
3 years ago
Need help ASAP! Please help with the slope to this question m= <br> B=
Inessa [10]

y=mx+b

therefore m = 1/2

and b = -6

7 0
2 years ago
What plus what equals 55
Dafna1 [17]
1 + 54 = 55
2 + 53 = 55
3 + 52 = 55 
4 + 51 = 55
5 + 50 = 55
6 + 49 = 55
7 + 48 = 55
8 + 47 = 55
9 + 46 = 55
10 + 45 = 55
and so on...

I hope that helps. :)
4 0
3 years ago
Read 2 more answers
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