Answer:
D) She should have divided 10 by negative 5 and gotten a -2
Step-by-step explanation:
The question is incomplete. Here is the complete question.
"Marla solved the inequality below incorrectly. What mistake did she make?
-5x - 3.5 < 6.5
-5x < 10
x > 2
a She added 3.5 to both sides when she should have subtracted.
b She should have divided both sides by negative 5 as her first step.
c She should not have flipped the inequality symbol in her answer
d She should have divided 10 by negative 5 and gotten a -2
Given the inequality
-5x - 3.5 < 6.5
Step 1:
We will move -3.5 to the other side of the inequality to have:
-5x < 6.5+3.5
-5x<10
Step 2:
Divide both sides by the coefficient of x which is -5. Note that the inequality sign changes when dividing or multiplying both sides of an inequality with a negative value.
-5x/-5 > 10/-5
x > -2
Based on the calculation, Maria's mistake was that she should have divided 10 by negative 5 and gotten a -2 not 2.
