Answer:
Option 5
Step-by-step explanation:
This expression is a difference of squares:
![x^2 - y^2 = (x + y)(x - y)](https://tex.z-dn.net/?f=x%5E2%20-%20y%5E2%20%3D%20%28x%20%2B%20y%29%28x%20-%20y%29)
X and y represent the two students.
Teacher wants to spend at least $5 in each of x and y. That means x or y could be either equal to 5 or higher than 5.
x ≥ 5
y ≥ 5
Teacher only spends under $30. That means the sum of x and y couldn't be equal to higher than 30. It should be lower than 30.
x + y < 30
The correct answer is option D
FIRST Remove parentheses.
−12+8+5-9
Simplify -12+8 to -4
-4 + 5 — 9
Simplify
−4 + 5 −4+5 to 1
1 — 9
Simplify
-8 is your answer
Answer:
deductive reasoning
Step-by-step explanation: