Answer:
12=obtuse
13=right
14=not a triangle
16=acute
Step-by-step explanation:
Answer:
D. The system is in echelon form.
Step-by-step explanation:
Check attachment
Step-by-step explanation:
solve for surface area
A=6a^2
a=edge
I could say that they will give you different answers since they are the same numbers and are in the same order but are paired differently
8x-9y=19
4x+y=-7
Multiply all terms of the 2nd by (9)===> 36x + 9y= 63
add (36x 9y= 63) to the 1st ===> 44x+0y = -44 ===> x=-1
replace x by this value in any of the equation & you'll get y=-3
