Answers:
The first and third options should be selected.
- The ordered pair (10,5) is a solution to the first equation because it makes the first equation true.
- The ordered pair (10,5) is not a solution to the system because it makes at least one of the equations false.
Explanation:
In order for a point to be a solution to a system of equations, it must make both equations true when its x and y values are substituted in. That being said, we need to test if (10,5) is a solution for the two equations.
Let's try the first equation. Substitute 10 for x and 5 for y and solve:
-5 does equal -5, so (10,5) is a solution to the first equation.
Next, let's test the second equation. Do the same:
However, 20 does not equal 11, therefore (10,5) is not a solution to the second equation.
So far, we know that (10,5) is a solution to the first equation, but not the second equation. Knowing this, it cannot be a solution to the system because it does not make both equations true. Therefore, only the first and third options should be selected.
The answer is negative 80 or like this -80
Answer:
Step-by-step explanation:
Let width be w.
Length is 2w.
Therefore:
2w + 2w + w + w = 30 cm
6w = 30 cm
w = 5 cm.
Width = 5 cm
Length = 5 * 2 = 10 cm
Area = length * width = 10 * 5 = 50 cm2
Answer:
8/12 + 3/12
Step-by-step explanation: multiply 2 and 3 by 4 to add these two fractions correctly.
I am gonna try my best to explain this to you :)
Firstly what you need to do is simplify the equation
Now it looks a little less complicated the next step is to isolate y, in order to do that we solve the equation for y
Simplify it
Now substitute y for
Now substitute x for 7 and solve for y
x=7 and y=0
Hope this helps :)