The answer is b. (-2,1) maximum
Answer:
1.No, 143 is not a prime number. The list of all positive divisors the list of all integers that divide 143 is as follows: 1, 11, 13, 143. To be 143 a prime number, it would have been required that 143 has only two divisors, itself and 1.
2.Since the polynomial can be factored, it is not prime.
X = low-energy lamp
y = high-energy lamp
1) 4x + 5y
2) 120= 4x + 5y
This in an expression is 3 <= x <= 9
Hope this helped!