Answer: (x, y) = (-26, 10)
This means x = -26 and y = 10 pair up together
===============================================================
How to get that answer:
Add the equations straight down. Think of having 3 separate columns for the three different like terms.
- 3x + (-3x) becomes 0x and that's just 0. So the x terms go away
- 9y + (-6y) is the same as 9y-6y which turns into 3y
- 12 + 18 becomes 30
After all that, we're left with the simpler equation 3y = 30. That solves to y = 10 after dividing both sides by 3.
Plug this back into any equation involving x and y. Solve for x
3x+9y = 12
3x+9(10) = 12
3x+90 = 12
3x = 12-90
3x = -78
x = -78/3
x = -26
We have found that x = -26 and y = 10 pair up together to form the solution.
-------------------
Checking the answer:
Plug (x,y) = (-26, 10) into the first equation
3x+9y = 12
3(-26)+9(10) = 12
-78+90 = 12
12 = 12
We get a true equation since the same thing is on both sides.
Repeat the same idea for the second equation
-3x-6y = 18
-3(-26) - 6(10) = 18
78 - 60 = 18
18 = 18
The second equation is true as well.
Both equations are true, so the solution (x, y) = (-26, 10) is confirmed.
Answer:
<em>it's an isosceles triangle, because two sides are the same length, and thus two angles are also the same.</em>
<em> * mark as brainliest please../;(</em>
<em />
Step-by-step explanation:
Answer:
by showing dots and correlations in a graph which will have an estimated slope, while not a definite one
Step-by-step explanation:
Answer:
1) Female
2) Male
Step-by-step explanation:
Answer:
There is 2600 combinations possible.
Step-by-step explanation:
The combinations for the first lock has 10 combinations
The combinations for the second lock has 10 combinations
The combinations for the third lock has 26 combinations
The total combinations is the product of all the locks.
There is 2600 combinations possible.
