The answer is 51
6+36- (-9)
42- (-9)
8x + 14y = 4
-6x - 7y=-10 / *2
8x + 14y=4
-12x -14y= -20
_________________
-4x=-16 => x=4; y= -2
Answer:
This is a 12% change
Step-by-step explanation:
To find the percent change, use the percent change equation.
(New - Old)/(Old) * 100 = Percent Change
(56 - 50)/(50)*100 = Percent Change
6/50 * 100 = Percent Change
.12 * 100 = Percent Change
12% = Percent Change
Answer:
x = 120
Step-by-step explanation:
Assuming you require to find the value of x
The sum of the interior angles of a polygon is
sum = 180° (n - 2) ← n is the number of sides
Here n = 6 , then
sum = 180° × 4 = 720°
Sum the interior angles and equate to 720
140 + 150 + 90 + x + 130 + 90 = 720 , that is
x + 600 = 720 ( subtract 600 from both sides )
x = 120
Answer:
1) B- Substitution
2) C- Elimination
3) A- Graphing
Step-by-step explanation:
1)
x+3y=7
5x+11y=3
x = 7 - 3y
Plug this x into the second equation and solve for y first
2)
5x-3y=3 --> (1)
2x+7y=6 --> (2)
Since making any variable the subject would involve fractions, it's better to go for elimination
7(1) + 3(2)
would eliminate y
3)
While comparing cost and adjusting choices, a graph is a better approach because all the possibilities are right in front
