All categories

3 years ago

only number 4, and please include the working. also do it with the substitution method not elimination or any other.

Mathematics

1 answer:

sergiy2304 [10]3 years ago

6 0

Answer:

x = -2 and y = 1

Step-by-step explanation:

→ Rearrange x - y = -3 to make y the subject

-y = - x - 3 so y = x + 3

→ Substitute into 2x + y = -3

2x + x + 3 = -3

→ Simplify

3x + 3 = -3

→ Minus 3 from both sides

3x = -6

→ Divide both sides by 3

x = -2

→ Substitute x value into first equation

-4 + y = -3

→ Add -4 to both sides

y = 1

You might be interested in

The following dot plot shows the number of cavities each of Dr. Vance's 63 patients had last month. Each dot represents a differ

goldfiish [28.3K]

Answer: 2

Step-by-step explanation:

is the center

4 0

4 years ago

10 pts. for whoever solves this!

iVinArrow [24]

Answer:

x = 4

Step-by-step explanation:

the segment inside the triangle is an angle bisector and divide the opposite side into segments that are proportional to the other two sides, that is

$\frac{x}{x+4}$ = $\frac{x+6}{2x+12}$ = $\frac{x+6}{2(x+6)}$ = $\frac{1}{2}$ ( cross- multiply )

2x = x + 4 ( subtract x from both sides )

x = 4

3 0

2 years ago

Write the number 345,000 in two other ways

My name is Ann [436]

300,000+40,000+5,000

Three hundred forty-five thousand

6 0

3 years ago

Read 2 more answers

Which measure of variability provides the most meaningful information about the following set of scores? Set of scores: 12, 12,

Alexus [3.1K]

Answer:

$Median$

Step-by-step explanation:

Median. Median in this case will give the most meaningful information about this data set.

<em>Reason</em>: There is at least one extreme score,32, in the distribution. It is an outlier that has a great effect on the mean:-

$m_9=\frac{148}{9}=16.44\\m_8=\frac{116}{8}=14.5 \ *11.8\% \ drop \ in \ mean.\\Median_9=15\\Median_8=14.5 \ *just \ a \ 3\% \ drop \ in \ median$

Hence median will give the most meaningful info about this data set

3 0

3 years ago

At an airport, its costs $7 to park for up to one hour and $5 per hour for each additional hour. Let x represent the number of h

Iteru [2.4K]

the answer would be C

because it is taking the total hours ( x) and subtracting 1 ( the first hour that cost $7

and then multiplying x by the $5 per minute and then adding the $7 for the first hour

8 0

3 years ago

only number 4, and please include the working. also do it with the substitution method not elimination or any other.​

only number 4, and please include the working. also do it with the substitution method not elimination or any other.