<h3>The answer is:</h3><h2>D. 5 hours</h2><h2 />
The equation should be:
(70x) - (20x) = 250
Because we have all the possible answers, we can plug one of them into x to see if it equals 250 miles.
Use an educated guess. I'm going to go with 5 because it seems reasonable.
(70 * 5) - (20 * 5) = 250
Let's check to see if it equals 250:
Therefore, the answer is D. 5 hours.
(Please mark as Brainliest! It helps me level up. Have a nice day!)
-Lena
Joe worked 8/40 or 1/5 of that time on Monday.
Answer:
x=4
Step-by-step explanation:
y=2x-10 and 6x+7y=10
6x+7(2x-10)=10
6x+14x-70=10
20x=80
x=4
The correct answer is 85 points in each contest
Explanation:
To solve this problem, the first step is to find out how many points Maddie has and then how many points she still needs to get a total of 750 points. Additionally, to do this, the correct process is to multiply the average points by the number of contexts.
In the first five contests, she obtained 68 points average
5 x 68 = 340 points in the first five contests
In the three following contests, she obtained 80 points on average
3 x 80 = 240 points
Now, let's add the points and find how many points she is missing to reach 750 points
340 + 240 = 580
750 - 580 = 170
Finally, let's divide the points missing by 2 because there are still two contests and Madie needs to get the 170 points in these two.
170 ÷ 2 = 85 points
Maddie needs to get 85 points on average to complete her goal of 750 points
