3 1/5-2 1/2+2 3/5 need help!

7 3/5

Step-by-step explanation:

The LCD here is 10; 10 is evenly divisible by 2 and 5.

Rewriting the mixed numbers, we get:

3 2/10 + 2 5/10  + 2 6/10, and so the sum is:

                     2 + 2 + 2

3 + 2 + 2 +  =  7 6/10, or, after reduction, 7 3/5

                            10

i leave the calculator work to you.

7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

[this is a bad problem because the actual radius of a car on the track is less than 0.2 miles so the answer is less than 0.4π miles]

9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet

answer: about 22.67

step-by-step explanation: