Answer:


Step-by-step explanation:
Use the Quadratic formula:

You can identify that, in this case:

Now you need to substitute these values into the formula:


Remember that:

Therefore,rewriting and simplifying, you get:



Then, you get the following roots:


Hello!
To find the surface area of a cube you do

where "a" is the length of one of the sides.
So

= 1350
the answer is 1350mm

Hope this helps!
The answer is C because you can have a triangle with 5,9,n 5,10,n 9,10,n and 5,10,9
The reason why is because the sum of two sides is always larger than the value of the third side.
I hope that this helps.
Answer:
Step-by-step explanation:
BDC=95