Answer:
x = 90°
y = 40°
z = 40°
Explanation (Concepts) :
A straight line has total 180° angle. A square has 4 sides of each 90° angle. A triangle is build up of 180° interior angle.
Workouts:
z + 90° + 50° = 180°
z = 180° - 90° - 50°
z = 40°
=================
x + 90° = 180°
x = 180° - 90°
x = 90°
==================
50° + 90° + y = 180°
y = 180° - 90° - 50°
y = 40°
For this case we have an expression of mixed numbers:

Rewriting the expression we have:

Remember that equal signs are added and the same sign is placed.

Answer:

Answer: 15, 17 and 19
Step-by-step explanation:
15 + 17 + 19 = 51
Answer:Let's solve for a.
d=
4
5
a+h
Step 1: Flip the equation.
4
5
a+h=d
Step 2: Add -h to both sides.
4
5
a+h+−h=d+−h
4
5
a=d−h
Step 3: Divide both sides by 4/5.
4
5
a
4
5
=
d−h
4
5
a=
5d−5h
4
Answer:
a=
5d−5h
4
Step-by-step explanation: