<span>Let x be the speed of the first car, then (x + 10) is the speed of the second car.
We can write the equation by the condition of the problem:
</span>


mph s<span>peed of the first car
</span>
Then 30+10=40 mph speed of the second car
Answer: 30mph and 40 mph.
<span>I hope this helps.</span>
I believe the answer is -5
Answer: The perimeter is when you add all of the sides together, and the area is when you multiply the sides together
Step-by-step explanation: