Two light houses flash their lights every 30 seconds and 40 seconds respectively. given that they flashed together at 10: 40 a. m, what time will they next flash together

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6

Which of the following is best modeled using a linear equation y=ax+b, where a is less than 0?

Add, subtract, multiply, or divide as indicated. list any restrictions for the variable(s) and simplify the answers when possible. 1) x-2 / x+5 + 3x / 2x-1 2) x+6 / x-6 - x^2 / x+6 3) x+9 / x-4 + x+2 / x^2-11x+28 4) x / x^2-64 + 11 / 2x^2+11x-40 5) 5 / x + 11 / x-3 - x-4 / x^2+2x-15