X-4y=28 2x+y=2 Elimination

1 answer:

3 0

$\left\{\begin{array}{ccc}x-4y=28\\2x+y=2&\text{multiply both sides by 4}\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}x-4y=28\\8x+4y=8\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad9x=36\qquad\text{divide both sides by 9}\\.\qquad\boxed{x=4}\\\\\text{Put the value of x to the second equation:}\\\\2(4)+y=2\\8+y=2\qquad\text{subtract 8 from both sides}\\\boxed{y=-6}\\\\Answer:\ \boxed{x=4\ and\ y=-6\to(4,\ -6)}$

You might be interested in

From the definition of absolute value, |3x|= when x>=0

devlian [24]

<h3>Answer: 3x</h3>

Explanation:

When x is zero or larger, then |x| = x.

An example: |9| = 9

This applies to |3x| as well, so |3x| = 3x when $x \ge 0$

4 0

3 years ago

12 times a number p___________

hram777 [196]

Answer:

12p

Step-by-step explanation:

12×p

12p

=12p

if you find my answer helpful you may tell me

7 0

3 years ago

Gabby is an aspiring country artist. She has a record contract that pays her a base rate of $200 a month and an additional $12 f

Rus_ich [418]

Answer:

From the formula above, you see that your slope would be the $12.

Step-by-step explanation:

So, from this problem the base rate is the y-intercept because it is fixed. The slope of the is the additional fee because it's changing by the number of albums sold. Below is the equation that should have been created using the slope intercept formula.

220 + 12x = 644

You will need the slope intercept form, y = mx + b

m is the slope

b is the y-intercept

5 0

3 years ago

3. Use two unit multipliers to convert 3000 inches to meters.

Verizon [17]

Answer:

here, 1m= 39.37 inches

or, 39.37 inches =1m

or, 3000 inches = 3000÷39.37 m