Answer:

Step-by-step explanation:
Apply FOIL method: 


Apply minus - plus rules


Simplify
Multiply 

Multiply 

Multiply 

Combine like terms

Multiply 


Answer:
Step-by-step explanation:
m+2/2 = 1/2
m=0.5
so
2m+4=5 is the correct answer
Circumference = 2×3.14×r
3.14 is pie and r is the radius.
To find the radius you divide the diameter by 2.
19 ÷ 2 = 9.5
2×3.14×9.5 = 59.66
Multiply 59.66 by 6 because ther are 6 pennies.
59.66 × 6 = 357.96 mm.
52 5/8 because 49 + 3 = 52 and 2/8 + 3/8 = 5/8