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Mazyrski [523]
3 years ago
9

Solve this system of equations: y = 7; y = -2x+1 *

Mathematics
2 answers:
k0ka [10]3 years ago
8 0

Answer:

x = -3

Step-by-step explanation:

y = 7

y = -2x+1

substitute for y

7 = -2x+1

subtract 1 from each side

6 = -2x

divide both sides by -2

6/-2 = x

x = -3

Gnoma [55]3 years ago
6 0

Answer:

x = -3

y = 7

Step-by-step explanation:

y = -2x + 1

7 = -2x + 1

<u>-1           -1 </u>

6 = -2x

divide by -2

x = -3

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I got three answers for alot points ok this is the first question what is : 1/2 + 3/6 =
miv72 [106K]

Answer:

1. 1

2. 1/12

3. 3 1/6

Step-by-step explanation:

Solution for #1. First, you have to get a common denominator. Here, that would be 6. In order to give 1/2 a denominator of 6, you will need to multiply the numerator and the denominator by 3. That will give you 3/6. Add that to the other 3/6 (3/6+3/6) which equals 6/6 which can be simplified to 1.

Solution for #2. This is just like #1.  First, you have to get a common denominator. Here, that would be 12. In order to give 1/3 a denominator of 12, you will need to multiply the numerator and the denominator by 4. That will give you 4/12. Then, to give 1/4 a denominator of 12, you will need to multiply the numerator and the denominator by 3. That will give you 3/12. Then, subtract (4/12-3/12). You will get an answer of 1/12.

Solution for #3. This is slightly different from the others, I has two more steps. First, you need to changed the mixed fractions into improper fractions. You will get 17/3 and 5/2. Then, you have to get a common denominator. Here, that would be 6. In order to give 17/3 a denominator of 6, you will need to multiply the numerator and the denominator by 2. That will give you 34/6. Then, to give 5/2 a denominator of 6, you will need to multiply the numerator and the denominator by 3. That will give you 15/6. After that, subtract (34/6-15/6). You should get 19/6. Finally, divide 19/6 and you should get 3R1. So, the mixed fraction version of 19/6 is 3 1/6 (I did this by using the 3 from 3R1 as the whole number and I just put the remainder of 1 over 6 as the fractional part). You can multiply to check your answer.

7 0
3 years ago
What do I do in this question
lianna [129]

Step-by-step explanation:

X × 3 + 4 = 22

X × 3 = 22 - 4

X × 3 = 18

X = 18 /3

X = 6

5 0
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lisabon 2012 [21]
45, I think hope this helps
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stira [4]
You can do pencil and paper or use a calculator if necessary 
Your answer is
<em>3.5</em>
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