Answer:
B) A and C
Step-by-step explanation:
A and C are negative reciprocals of each other.
First one = 9x3=27
Second one 12x9=108
3rd one = 3x4=12
Idk what that last one is
After putting the value of y from the second equation to the first equation, the resultant equation is
.
GIven:
The equations are:

It is required to put the value of y from second equation to the first equation.
<h3>How to solve equations?</h3>
The value of y from the second equation is,

Now, put this value of y in the first equation as,

Therefore, after putting the value of y from the second equation to the first equation, the resultant equation is
.
For more details about equations, refer to the link:
brainly.com/question/2263981
Answer:
I really don't know i don't care
Step-by-step explanation:
plz plzplzplzp you can u just give 500fb a 75hz to get amazon for free and you are you for the only reason 5-pack 3fE6bFt 5-pack 3d is not an average annual 75hz 8
You find the area of a triangle by using 1/2*b*h where b is the base and h is the height. since we already know the area is 20 and the height is for you plus them in so the problem would be 20= 1/2 (b) (4) then you multiply what you know together to get 20= 2b and then isolate the b by dividing both sides by two so the base should be 10 m