Answer:
21cm^2
Step-by-step explanation:
V=B*h
B=(x-12)^2
h=6
(x-12)^2*6=486
Solve using quadratic equation and you get 21 and 3.
3 doesn't work so it is 21
Answer:

Step-by-step explanation:
Given
The attached triangle
Required
Find x and y
The given triangle has 45 degrees as one of its angles, and it is also a right angle triangle.
For this kind of parameter, the opposite = the adjacent
i.e. x = y
Apply Pythagoras theorem

Substitute x for y


Divide by 2

Take square root


Split




Answer:
Step-by-step explanation:
we can use the distributive property and write it as
(-2g-g ) + (7-11)
-3g -4
The answer will have to be 4) a+b=3b so this is because a+b hads to equal something like a=1 ans b=2 then you will have a+b and you will always end up with 3ab or 3b