Answer:

Step-by-step explanation:
-5+2(10b-2)=31
Expand brackets.
-5+20b-4=31
-9+20b=31
Add 9 on both sides.
20b=40
Divide both sides by 20
b=2
Answer:
vol=BX1/3 h
=64* 1/3 square root of 32
Step-by-step explanation:
Assuming this triangle is a right triangle, 52 degrees.
Answer:
x=5 y=-6
Step-by-step explanation:
3x+y=9 ------eqn1
y=4-2x -------eqn2
using substitution
put y=4-2x into eqn1
3x+4-2x=9
x=5
put x=5 into eqn2
y=4-2(5)
y=4-10
y=-6
The answer is 25
Step-by-step explanation:
We know that all the angles of a triangle add up to 180 degrees.
If J = L then L = J so they will both equal 50 cut in half is 25
i hope this helps:)