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

The first is the first one tho
Answer:
x = 1
x = 0
x = 1 1/4
Step-by-step explanation:
x = 1
x = 0
x = 1 1/4
The < sign means less than. -1/4 is less than 1, 0, and 1/4, and more than -3/4 and -1. So, 1, 0, and 1 1/4 are the right answers.
<em>Hope that helps!</em>
<em>-Sabrina</em>