8(7k + 7d +7) for k = 5 and d =4
1 answer:
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multiply the 2nd fraction by 8/8 to get rid of the 8 in the denominator:
simplify the 1st fraction by multiplying by 2/2:
now, you can cross-multiply:
Answer:
r = 55.2 cm
Step-by-step explanation:
the arc length is calculated as
arc = circumference × fraction of circle
= 2πr × ( r is the radius )
given arc = 63.48π , then
2πr × = 63.48π ( cancel 2π on numerator/ denominator )
r × π = 63.48π ( divide both sides by π )
= 63.48 ( multiply both sides by 20 to clear the fraction )
23r = 1269.6 ( divide both sides by 23 )
r = 55.2 cm