Answer:
probability = 6/7
Step-by-step explanation:
a+b+c= 30 students
there are 35 students in total.
=30/35
30/35 fully simplified = 6/7
the probability that a student earns a grade of A, B, or C is 6/7.
also, 6/7 as a decimal rounded the nearest hundreth is 0.86, FYI.
Answer:

Step-by-step explanation:

Expanding brackets.

Adding 2m and 6 to both sides.

Combining like terms.

Dividing both sides by 14.

Answer: 22 to 55 to 44
Step-by-step explanation: Start with the factors you know. It can't be two because 2 doesn't go into 275 evenly. It can't be three because all of them evenly don't go into three. It can't be four because 110 and 275 don't go into it evenly. But five works. 110/ 5 is 22, 275/ 5 is 55, and 220/ 5 is 44.
Answer:
Option D: 6:12 is correct answer.
Step-by-step explanation:
We can find the simplest form of ratio to compare it with the given ratios.
According to given statement,
The ratio is:

Now we will check if the given options can be simplified to 1:2
So,
Option A:

Option B:

Option C:

Option D:

As we can see that 6:12 can be simplified to 1:2 which is same as 2:4 so it will make the same shade of purple.
Hence,
Option D: 6:12 is correct answer.
The constant of proportionality should be 45 miles per hour, and the car should travel 135 miles in three hours.