Answer:
x > 3
Step-by-step explanation:
-7x < -21
Divide each side by -7, remembering to flip the inequality
-7x/-7 > -21/-7
Get the variable (x) by itself. Divide both sides by -7. Since a negative/ negative = positive, the 3 is positive. When you multiply or divide by a negative, the inequality sign flips. I hope this helped.
Let her brother's age be x
Sarah is 2x + 4
208
40
hope it is helpful to you
Distance = Speed x time = 162 x 3 = 486 miles/hour
Answer: 486 miles/hour
