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Radda [10]
3 years ago
9

Solve the system of equations by substitution: y = x - 2

Mathematics
1 answer:
gizmo_the_mogwai [7]3 years ago
4 0

Step-by-step explanation:

y = x - 2

x + y = 12

Substitute the first expression for y into the second equation.

x + (x - 2) = 12

2x - 2 = 12

2x = 14

x = 7

Now plug into either equation to find y.

y = 7 - 2

y = 5

So the solution is (7, 5).

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HELP ME PLZZ I NEED HELP WITH THIS
Ulleksa [173]

Answer:

25 + 11 hope this helps

Step-by-step explanation:

answer is the third one

8 0
3 years ago
Write 0.39 as a fraction in simplest form
nika2105 [10]
Here's how to convert 0.39 to a fraction...

There is not much that can be done to figure out how to write 0.39 as a fraction, except to literally use what the decimal portion of your number, the .39, means.

Since there are 2 digits in 39, the very last digit is the "100th" decimal place.

So we can just say that .39 is the same as 39/100.

So your final answer is: 0.39 can be written as the fraction 39/100 (ALREADY SIMPLIFIED)

3 0
3 years ago
Read 2 more answers
Six friends went to a hockey game. The price of admission per person was $x. Four of the friends bought a soda for $2. Write and
Citrus2011 [14]
6x+4 (2). The expression simplifies to 6x+8
4 0
4 years ago
Jade had the following system of equations to help her with a physics problem, but she only needed to know what the sum of x and
pav-90 [236]
From the second:

2x-y=4

x=(4+y)/2 and applying this to first:

4+y+3y=12

4y+4=12

4y=8

y=2 and since x=(4+y)/2, x=3 so 

x+y=2+3=5
8 0
3 years ago
In order to conduct an experiment five subjects are randomly selected from a group of 48 subjects how many different groups of f
exis [7]

Answer:

1,712,304 ways

Step-by-step explanation:

This problem bothers on combination

Since we are to select 5 subjects from a pool of 48 subjects, the number of ways this can be done is expressed as;

48C5 = 48!/(48-5)!5!

48C5 = 48!/43!5!

48C5 = 48×47×46×45×44×43!/43!5!

48C5 = 48×47×46×45×44/5!

48C5 = 205,476,480/120

48C5 = 1,712,304

Hence this can be done in 1,712,304ways

3 0
3 years ago
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