Answer:
30 students
Step-by-step explanation:
all students = girls+boys
all students= 15+35=50
40% of 50= 20
50-20=30
30 students didn't take the bus to school
Answer:
(x + 2)²
Step-by-step explanation:
Given
x² + 4x + 4 ← is a perfect square of the form
(x + a)² = x² + 2ax + a²
Compare like terms
a² = 4 ⇒ a =
= 2, thus
x² + 4x + 4 = (x + 2)²