1. A
2. B
3. A
4. C
5. B and C
Step-by-step explanation:
-20+11
negative and positive sign will change in negative so ans will be=-9
because positive sign is on greater number
The answer is 24 because 8 times 3 is 24
Answer:
Step-by-step explanation:
12a)To rationalize the denominator, multiply the denominator and numerator by √5.

b) (a+b)² = a² + 2ab + b²
(1 +√3)² = 1² + 2*1*√3 + (√3)²
= 1 + 2√3 + 3
= 4 + 2√3
a = 4 ; b =2
13) (a + b)(a - b) = a² - b²
