Question 4
which of the following expressions is the conjugate of a complex number with −6 as the real part and −5i as the imaginary part?
6 + 5i
6 − 5i
−6 − 5i
−6 + 5i
question 5
simplify 81 to the negative 3 fourths power
−27
negative 1 over 27
27
1 over 27
question 6
find the solution of three times the square root of the quantity of x plus 5 equals negative 9
x = 4; not extraneous
x = 4; extraneous
x = 0; extraneous
x = 0; not extraneous