Question

hi guys please answer this math question​

Answer 1

Step-by-step explanation:

common difference=a2-a1

=9 1/2-7 3/4

=19/2-31/4

=7/4 or

1.75or 1 3/4

the general term of ap is

an=a+(n-1) d

a99=31/4+(99-1) 7/4

a99=31/4+98*7/4

=31/4+686/4

=717/4

179 1/4

Answer 2

Answer:

$a = 7 \frac{3}{4}$

$d = 9 \frac{1}{2} - 7 \frac{3}{4} \\ = \frac{19}{2} - \frac{31}{4} \\ = \frac{38 - 31}{4} \\ = \frac{7}{4}$

n=99

T base99=a+98d

$= 7 \frac{3}{4} + 98 \times \frac{7}{4} \\ = \frac{31}{4} + \frac{686}{4} \\ = \frac{31 + 686}{4} \\ = \frac{717}{4} = 179 \frac{1}{4}$