Aschool employs 75 teachers. the following table summarises their length of service at the school,
classified by gender.

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

a) 7x=7

step-by-step explanation:

you can not solvr this without numbers