All categories

3 years ago

X+4y=30 system by substitution X-2y=0

Mathematics

1 answer:

Dmitry [639]3 years ago

3 0

Answer:

x=10, y=5

Step-by-step explanation:

For substitution, you always want to get the variable alone. The second equation (x-2y=0) will be easier to substitute into the first equation.

x-2y=0

x=2y

You can substitute 2y as x on the first equation (x+4y=30).

2y+4y=30

6y=30

y=5

Plug y=5 into any equation.

x+4(5)=30

x+20=30

x=10

You might be interested in

Which equation is represented by the graph below?

LuckyWell [14K]

Answer:

Step-by-step explanation:

Hello

A (5;2)

B (-1;-7)

y = ax + b

2 = 5a + b

-7 = -a + b

2 - (-7) = 5a - (-a) + b - b

2 + 7 = 5a + a

9 = 6a

a = 9/6

a = 3/2

2 = 3/2 * 5 + b

b = 2 - 15/2

b = 4/2 - 15/2

b = 11/2

y = 3/2 x + 11/2

y+1= 3/2(x-4)

y + 1 = 3/2 x - 6

y = 3/2 x - 6 - 1

y = 3/2 x - 7 => no

y-4= 3/2(x+1)

y - 4 = 3/2 x + 3/2

y = 3/2 x + 3/2 + 4

y = 3/2 x + 3/2 + 8/2

y = 3/2 x + 11/2 => yes

y+4= 3/2(x-1)

y + 4 = 3/2 x - 3/2

y = 3/2 x - 3/2 - 4

y = 3/2 x - 3/2 - 8/2

y = 3/2 x - 11/2 => no

y-1= 3/2 (x+4)

y - 1 = 3/2 x + 6

y = 3/2 x + 6 + 1

y = 3/2 x + 7 => no

5 0

3 years ago

Read 2 more answers

what is the approximate percent increase when the population of a town increases from 12,089 to 15,025? round the population amo

IrinaVladis [17]

Answer:

The approximate percentage is 25%.

Step-by-step explanation:

The initial population was = 12089 rounded off to 12000.

The final population is = 15025 rounded off to 15000.

Change in population = $15000-12000=3000$

So, the approximate percent increase is =

$\frac{3000}{12000}\times100$

= 25%.

7 0

3 years ago

Read 2 more answers

Good morning!

Assoli18 [71]

<h3>♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫</h3>

➷ 2) The integral of a constant follows this rule:

adx = ax

In this case, it is 1dx = 1x

This can be simplified to just x

Add a constant to this, to get the final answer of:

x + C

3) The integrals power rule is:

$x^adx = \frac{x^a^+^1}{a +1}$

Substitute the values in:

$\frac{x^5^+^1}{5 +1}$

This can be simplified to:

$\frac{x^{6} }{6}$

Add a constant to this to get the final answer of:

$\frac{x^{6} }{6} +C$

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

4 0

3 years ago

Is it possible to complete

Mrac [35]

Answer:

is it possible to complete

diagram be so that is not a function if so completely that round to show a relation but not a function if not justify your reasoning

yes

Step-by-step explanation:

8 0

3 years ago

The segments in each figure are tangent to the circle at the points shown.<br> Find each length.

anyanavicka [17]

Answer:

please post the figure then it will be easier to solve the problem

3 0

2 years ago