Question

Which of the following shows the correct process of solving −30+4.5
?(1 point)
Responses

−30+4.5=(−3)0+4.5=1+4.5=5.5
negative 3 superscript 0 baseline plus 4.5 equals left parenthesis negative 3 right parenthesis superscript 0 baseline plus 4.5 equals 1 plus 4.5 equals 5.5

−30+4.5=−3⋅0+4.5=0+4.5=4.5
negative 3 superscript 0 baseline plus 4.5 equals negative 3 times 0 plus 4.5 equals 0 plus 4.5 equals 4.5

−30+4.5=−3+4.5=1.5
negative 3 superscript 0 baseline plus 4.5 equals negative 3 plus 4.5 equals 1.5

−30+4.5=−1⋅30+4.5=−1⋅1+4.5=−1+4.5=3.5

Answer 1

The fourth option is correct.

Reason: exponents are evaluated before the unary minus, so
-3^0 + 4.5 = -(3^0) + 4.5 = -1 + 4.5 = 3.5.

(If it were written (−3)^0, that would equal 1, but that's not the same as -3^0.)