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2 years ago

If 2x+ 3y = 55 and 4x= y+ 47, ﬁnd x − y. Can you please explain with some details?

1 answer:

8 0

4x=y+47, we can subtract 47 from both sides to get:
4x-47=y, now we know what y equals in terms of x, so we can substitute that in to the other equation:
2x+3y=55 becomes 2x+3*(4x-47)=55 which becomes:
2x+12x-141=55 which becomes 14x-141=55 and we can add 141 to both sides:
14x=196, divide 14 by both sides, we get x=14, which we can substitute back into the y=equation:
4x-47=y becomes 14*4-47=y which becomes y=9
x=14, y=9
x-y=14-9=5

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andreev551 [17]

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8 0

3 years ago

5x-6=3x<br> what does x equal

makvit [3.9K]

5x-6= 3x
⇒ 5x-3x= 6
⇒ 2x= 6
⇒ x= 6/2
⇒ x= 3

Final answer: x=3~

3 0

2 years ago

Read 2 more answers

Using the graph determine the equation of the axis of symmetry

zalisa [80]

It’s is 1
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5 0

2 years ago

the annual rate of inflation is given by the formula I = (p2/p1)^1/n - 1, where p1 is the initial price of an item and p2 is the

aleksklad [387]

Answer:

<h2>The value of $n$ is 31 years.</h2>

Step-by-step explanation:

The given equation is formed by different variables, where $n$ indicates the period of time in years where the rate of inflation is calculated.

In this case, we have a period from 1980 to 2011. The difference between these years would be the period of time used to find the inflation rate.

$2011-1980=31$

Therefore, the value of $n$ is 31 years.

5 0

2 years ago

PLEASE HELP! WIL GIVE BRAINLLIEST!

yarga [219]

Answer:

First Graph is Correct

Step-by-step explanation:

We are given the inequality:

$n \leq 46$

This means any number EQUAL TO or LESS than 46

Since, we have "equal to", there should be a "closed" circle on 46 (it means 46 is included).

LESS THAN means all numbers to the "LEFT".

Looking at the 4 number lines, we can eliminate last 2 choices since they don't have closed circles.

As for the first two choices, the first choice is correct because it shows us all the numbers left of 46 and 46 included (signified by the closed circle).

So, the first number line is the solution

4 0

3 years ago