Question

Snd me ans of 15, 18 plzzz​

Answer 1

15) the formula is a+(n-1)d

Here a= the first number, d= the common difference between given arthematic mean , n=number of terms

There fore an= 5+(31-1)*10

an= 5+(30)*10

an=5+ 300

an=305

an+130

There fore 305+130 =435 is the the 31st term + 130.

18) for finding remains area we should do area of square -area of circle (because the four quadrants are equals to 1 circle)

There fore area of square = a*a

Area of circle = 22/7 * r*r

Here a=100; r=14

Area of square =100*100=10000

Area of circle = 22/7*14*14

=22*2*14

=44*14

376

There fore area of square-area of circle = 10000-376

= 9734

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