Answer:
1/12
Step-by-step explanation:
subtract the four soloists who can't be chosen from the total musicians
16-4=12
Itzhak is one person out of 12 who could be chosen to speak
Also the question is annoying because nobody calls an orchestra with 16 people a "16 piece orchestra"
For number 19:
"at least 150" means either 150 ≤ ? or ? ≥ 150
plus 3 so +3x
The answer would be 150 ≤ 100 + 3x
Number 20:
A is at -2.5. The inverse is the opposite so 2.5
A product of two (or more) factor can be zero if and only if at least one of the factors is zero.
In other words, you cannot multiply two non-zero real numbers, and have zero as a result.
So, if we want the product of these two factors to be zero, at least one of them has to be zero.
The first factor is zero if

The second factor is zero if

I’m getting 61/24 I’m sorry if it’s wrong.
<span>For a function "f" defined by an expression with variable theta, the implied domain of "f" is the set of all real numbers variable theta can take such that the expression defining the function is real. !</span>