Rosie bought 3 2/5 yards of material for $4.25 per yard. How much did she spend?

$14.45

Step-by-step explanation:

Convert 3 2/5 yards to decimal = 17/5 = 3.4 yards

If 1 yard = $4.25

Then 3.4 yards = x

Cross multiply

x = $4.25 x 3.4

x = $14.45

I hope this helps.

an = 22 + (n-1) *6

110 seats

step-by-step explanation:

an=a1+(n-1)(d)

a1 = 22   this is the first item in the sequence

d =6   this is how the sequence goes up

a)   an = 22 + (n-1) *6

b) a12 = 22 + (12-1) *6

    a12 = 22+11*6

  a12 = 22 +88

  a12 = 110