Need help on precalculus

arc = 15π

Step-by-step explanation:

The arc is calculated as

arc = circumference of circle × fraction of circle

     = 2πr × ( r is the radius )

given diameter = 24 then r = 24 ÷ 2 = 12

arc = 2π × 12 ×

     = 24π ×

     = 3π × 5

    = 15π

well we know there are 4 clubs in 52 cards so it’s replaced so it should be 3/51

step-by-step explanation:

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116