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goblinko [34]
3 years ago
9

Solve the system of linear equations by substitution. x + 4y = 6 x - y = 1

Mathematics
1 answer:
bulgar [2K]3 years ago
6 0

9514 1404 393

Answer:

  (x, y) = (2, 1)

Step-by-step explanation:

Use the second equation to write an expression for x:

  x = 1 +y

Substitute that into the first equation:

  (1 +y) +4y = 6

  5y = 5 . . . . . . . . subtract 1, collect terms

  y = 1 . . . . . . . divide by 5

  x = 1 +1 = 2 . . . use the expression for x to find x from y

The solution is (x, y) = (2, 1).

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I need help with 1 & 3.. thanks
AlekseyPX

Answer:

y/x = (a + b) / (m + n)

Step-by-step explanation:

-(xb − ym) = -yn + xa

Distribute:

-xb + ym = -yn + xa

Combine like terms:

ym + yn = xa + xb

Factor:

y (m + n) = x (a + b)

Rearrange:

y/x = (a + b) / (m + n)

8 0
3 years ago
there are 350 students at miller middle school 12/25 of the students are girls.how many students are boys
Mars2501 [29]
<span>There are 350 students at miller middle school. - it's 25/25
Girls - 12/25 </span><span>of the students
</span>This means that 25/25-12/25=13/25 <span>of the students</span> are boys.
350*13/25=182 students are boys.

5 0
4 years ago
Does the function below represent a linear function, an exponential function, a quadratic function, or none of these?
Butoxors [25]

The equation of the function given as (x)= 5 * 2^x is an exponential function

<h3>How to determine the function type?</h3>

The equation of the function is given as

f(x)= 5 * 2^x

An exponential function is represented as

f(x) = a * b^x

Where

Initial value = a

Rate = b

This means that

a = 5

b = 2

Hence, the equation of the function given as (x)= 5 * 2^x is an exponential function

Read more about exponential function at

brainly.com/question/27161222

#SPJ1

7 0
2 years ago
2. What number am I?
Ymorist [56]

Answer:

i have no clue sorry..... you can delete this btw

5 0
3 years ago
At the same time of day, a man who is 75 inches tall casts a 50-inch shadow and his son casts a 22-inch shadow. What is the son'
nikitadnepr [17]

Answer: i think its 55 but im not sure

8 0
3 years ago
Read 2 more answers
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