Answer:
x = -1
y = -1
Step-by-step explanation:
This is a system of equations- the set up of the problem lends well to using the elimination method. There are always many ways of solving a system of equations, both in methods and different strategies within each method. The problem isn't necessarily complete but I can assume you're being asked to solve for x and y values.
divide the first equation by -2. this means we can use elimination to cancel out the y value, and is also our simplest option (rather than multiplying the second equation by -2.
-2x + 20y = -18 --> x - 10y = 9
x - 10y = 9
8x + 10y = -18
Using the elimination method to essentially add the parts of the equations together, this comes out to 9x = -9 , meaning x = -1 .
We can then return to our original equations, and substitute -1 for x (either equation will work, but the second one is simpler and therefore the better option).
8 (-1) +10y = -18
-8 + 10y = -18
10y = -10
y = -1
CHECKING
Substitute both x and y values back into the original equations to check them. the sides should be equal if our values are correct.
-2 (-1) + 20 (-1) = -18
Our first equation works: 2 - 20 = -18
8 (-1) + 10 (-1) = -18
The second equation works as well: -8-10= -18
»»————-Question:————-««
The water level of a lake depleted by 1.2 inches during a 13 week long dry spell.
What is the average rate at which the water level changed every week?
»»————-<em>Answer:</em>————-««
0.0153 inches
»»————-<em>Reasoning:</em>————-««
1.2÷13=0.0153
*°:⋆ₓₒ Hope this helps! (ෆ˙ᵕ˙ෆ)♡ If my answer is wrong, please correct me! Thank you!ₓₒ⋆:°*
-Boba♡
120 because of course 1 can go into anything, 2 would be 60, 3 would be 40, 4 would be 30 and 5 would be 24
Answer:
Yes
Step-by-step explanation:
you are correct
Don't you have to show your work though??
Answer:
angle C is 90°
Step-by-step explanation:
(sorry if thats not the answer the question is confusing)
have a nice day!! :)