X+90+61=180 ( the sum of the three angles in a triangle is 180 °)
x+151=180°
x=180-151
x=29°
Answer:
10x+23 (pretty sure) and the * means multiply
Step-by-step explanation:

Answer:
Step-by-step explanation:
x - 3 < 4
x < 4 + 3
x < 7
Answer:
Step-by-step explanation:

BC = 15 cm
3x = 15
x = 15/3 = 5
AB =4x = 4*5 = 20 cm
Pythagorean theorem,
AC² = AB² + BC²
= 20² + 15 ²
= 400 + 225
= 625
AC = √625 = 25 cm
AC = 25 cm
