Answer:
10a+b+9c
Step-by-step explanation:
first you have to join the like terms then you add them then you write the answer, I hope you understood
9c+5a+5a+b
9c+10a+b
10a+b+9c
2 acute angles because all of the angles of the triangle must add up to 180 degrees. If you used 90 degrees already you only have 90 degrees left to make the other two angles.
Answer:
5
or 18.03
Step-by-step explanation:
Let's call the unknown leg x
Using the Pythagoras rule
19^2 = 6^2 + x^2
361 = 36 + x^2
subtract 36 from both sides
361 - 36 = x^2
325 = x^2
Take the square root of both sides
= 
= x
x = 5
= 18.03