Holden and bryson started to hike a portion of the appalachian trail that is 12 2/5 miles long. due to snow, they had to stop after hiking 7 1/2 miles. how much of the trail did they miss hiking

4 9/10

Step-by-step explanation: You need to subtract 12 2/5 and 7 1/2.

The two fractions have different denominators. Multiply to find a common denominator

2/5 x 2/2 = 4/10

1/2 x 5/5 = 5/10

Now you have 12 4/10 minus 7 5/10. But you cannot subtract 4/10 and 5/10 equally.

Subtract 12 - 1 and add 1 to 4/10.

12 - 1 = 11

10/10 (10/10 is 1) + 4/10 = 14/10

Now you have 11 14/10 minus 7 5/10. Subtract.

11 - 7 = 4

14/10 - 5/10 = 9/10

That makes 4 9/10.

Hope this is helpful :)

the discriminant is 64 + 4*1*12 = 112

this is prime.

step-by-step explanation:

8

step-by-step explanation: