Alice Binney invented them.
Answer:
option 3
Step-by-step explanation:
Using the Sine rule in Δ ABC, that is
= 
, that is
= 
( cross- multiply )
CA × sin30° = 20 × sin45° ( divide both sides by sin30° )
CA = 
→ (3)
The expression 6x^2-1 cannot be factored or simplified any further.
We have the expression:( x - 2 ) / ( x + 9 ) ( x - 5 )We have to find how many values of x must be excluded. The rule is : denominator must never equal zero. Anything divided by zero is undefined.x + 9 ≠ 0, x ≠ - 9x - 5 ≠ 0, x ≠ 5.Answer: Two values must be excluded, x = - 9 and x = 5.
Was there more information to this question? doesn't make sense
