Simplify by combining like terms: 6.1a + 5.7b + 3a

9.1a + 5.7b

Step-by-step explanation:

Original Equation:

6.1a + 5.7b + 3a = ?

Add 6.1a to 3a

9.1a

Plug this value back into the equation:

9.1a + 5.7b

Hope this helps :)

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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

the answer is 45 i just did it on oddesy ware