Answer:
x = -5
, y = 2
Step-by-step explanation:
Solve the following system:
{y + 2 x = -8
-5 y + 3 x = -25
Hint: | Choose an equation and a variable to solve for.
In the first equation, look to solve for y:
{y + 2 x = -8
-5 y + 3 x = -25
Hint: | Solve for y.
Subtract 2 x from both sides:
{y = -2 x - 8
-5 y + 3 x = -25
Hint: | Perform a substitution.
Substitute y = -2 x - 8 into the second equation:
{y = -2 x - 8
3 x - 5 (-2 x - 8) = -25
Hint: | Expand the left hand side of the equation 3 x - 5 (-2 x - 8) = -25.
3 x - 5 (-2 x - 8) = (10 x + 40) + 3 x = 13 x + 40:
{y = -2 x - 8
13 x + 40 = -25
Hint: | Choose an equation and a variable to solve for.
In the second equation, look to solve for x:
{y = -2 x - 8
13 x + 40 = -25
Hint: | Isolate terms with x to the left hand side.
Subtract 40 from both sides:
{y = -2 x - 8
13 x = -65
Hint: | Solve for x.
Divide both sides by 13:
{y = -2 x - 8
x = -5
Hint: | Perform a back substitution.
Substitute x = -5 into the first equation:
{y = 2
x = -5
Hint: | Sort results.
Collect results in alphabetical order:
Answer: {x = -5
, y = 2
The percent change in attendance from 2014 to 2015 is 11.54 %
<em><u>Solution:</u></em>
Given that,
In 2014 the tenants at Jefferson school’s Fall festival Was 650
In 2015 the attendance was 575
<em><u>To find: percent change in attendance from 2014 to 2015</u></em>
Percentage change equals the change in value divided by the absolute value of the original value, multiplied by 100.
Change in attendance from 2014 to 2015 = attendance from 2014 - attendance from 2015
Change in attendance from 2014 to 2015 = 650 - 575 = 75
<em><u>Therefore percentage change is given as:</u></em>
Thus the percent change in attendance from 2014 to 2015 is 11.54 %
Answer:
you can make 3 rectangles with an area of 12in
Answer:
1/4,
Step-by-step explanation:
105 m = 2.5 h
x miles = 1 hour
You cross multiply since it's a proportion:
2.5 * x
105 * 1
=
2.5x = 105
Then you divide everything by 2.5
The answer is 42
