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3 years ago

Solve: X + y = 4 -5x - 6y = -18

Mathematics

2 answers:

OLga [1]3 years ago

7 0

Answer:

x = 6 and y = -2

Step-by-step explanation:

In an equation our aim is to find the value of what we are looking for as well as keeping the equation balanced. For example if we took away 5 only from one side then the equation would change so it's an important rule to keep in mind when solving equations, that you need to keep both sides of the equation the same.

x + y = 4

-5x - 6y = -18

→ We have to multiply the top equation by -6 so the y coefficients are the same

-6x - 6y = -24

-5x - 6y = -18

→ Minus the equations

-x = -6

x = 6

→ Substitute x = 6 back into x + y = 4

6 + y = 4

y = -2

So the solutions are y = -2 and x = 6

LiRa [457]3 years ago

4 0

Answer: x = -5, y = 9

Step-by-step explanation:

The solution to the system of equations can be represented as a point.

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On a number line, how many units away is the sum of the numbers 5 and 21 located from the number 5?

Eduardwww [97]

Answer:

11 units away

Step-by-step explanation:

5 + 21 = 26

26 - 5 = 11

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4 years ago

What is the value of 19 square root two correct to two significant number

vlabodo [156]

Answer:

Step-by-step explanation:

19√2 = 26.8701

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4 0

4 years ago

Read 2 more answers

I don't get how to show the work For the Jocelyn estimates on a piece of wood measures 545 cm if it actually measures 5.2 cm wha

olga2289 [7]

Answer:

The percent error is 4.81%.

Step-by-step explanation:

There is a mistake in a question, hence it is corrected below:

Jocelyn estimates on a piece of wood measures 5.45 cm if it actually measures 5.2 cm.

Now, to find the percent error.

Estimation of Jocelyn = 545 cm.

Wood actually measures = 5.2 cm.

So, to get the measurement error we subtract wood actually measures from estimation of Jocelyn:

$5.45-5.2\\\\=0.25\ cm.$

Thus, the error in measurement = 0.25 cm.

Now, to get the percent error:

$\frac{0.25}{5.2}\times 100$

$=\frac{25}{5.2}$

$=4.81\%.$

The percent error of Jocelyn's estimate is 4.81%.

Therefore, the percent error is 4.81%.

3 0

3 years ago

Ms. Thomas has % of a tub of ice cream to share equally among her 3 kids. What fraction of the

aev [14]

Answer:

Each kid will receive 1/3 (one-third) of the tub of ice cream.

Step-by-step explanation:

Ms. Thomas needs to divide the tub of ice cream to her three kids. This means each kid will receive 1/3 because 1/3 + 1/3 + 1/3 = 1, meaning one tub of ice cream.

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3 years ago

Is 36/6 a intege NEED A WUICK ANSWER PLSS

WITCHER [35]

36/6 would simplify to 6
Integers are basically whole numbers (both positive and negative), or numbers that can be written without a fraction
Even though 36/6 is a fraction, it would simplify into a whole number so it is a integer
Hope that helped :)

3 0

3 years ago