In this problem, you must change the signs of everything in the parenthesis, which will come to 3x^2 + x - 5x^2 - x + 4. Add like terms, and you will end up with -2x^2 + 4, which is answer choice A. Hope this helped
Yes they will be equal at some point. Although Marc has more miles on his car at the current moment, Elena is adding miles at a higher rate.
Elena's car: 7000 + 21000t
Marc's car: 20000 + 11000t
To find at what time t they are equal, set these two expressions equal to each other and solve for t.
7000 + 21000t = 20000 + 11000t
13000 = 10000t
t = 1.3 years from now
Answer:
2.5 hours
Step-by-step explanation:
To calculate the time taken to travel the distance, we will apply the distance speed time formula, which links the speed of an object, the distance traveled by it and the time taken for it to travel the distance as follows:
Time taken to travel the distance = Distance Traveled / Average Speed
We know the average speed to be 7 km/h
and the total distance traveled to be 17.5 km
Using these values and putting them in the equation we get,
Time taken = 17.5 / 7 = 2.5
<h3>Hope this helps!</h3>
Answer: 492 miles
Step-by-step explanation:
The first thing to do in such a question is to find out the number of miles Violet can go on 1 gallon.
That figure is:
= 369 / 12
= 30.75 miles per gallon
With 16 gallons therefore, she can go:
= 16 * 30.75
= 492 miles
Answer:
1
Step-by-step explanation:
