The coefficients are -7, 8, -3, 1, and -9
<span>The rule of signs is the same for multiplication and division.
Two numbers with the same sign, multiplied or divided, the answer is positive.
Two numbers with different signs, multiplied or divided, the answer is negative. </span>
Idiophone means an instrument that will produce a sound when being struck.
so the answer is B.
What he/she said is correct