Question

Write an equivalent expression by distributing the −− sign outside the parentheses: −(−7d+1.9)

a)−7d−1.9
b)7d+1.9
c)−7d+1.9
d)7d−1.9

Answer 1

To distribute the negative sign outside the parentheses for the expression −(−7d+1.9), we change the sign of each term inside, giving us the equivalent expression 7d − 1.9.

Step-by-step explanation:

The student has been asked to distribute the negative sign outside the parentheses: −(−7d+1.9). Distributing the negative sign across the terms inside the parentheses changes the sign of each term within. The correct distribution results in the expression: −7d becomes 7d and +1.9 becomes −1.9. So, the equivalent expression is 7d − 1.9, which matches option (d).