the answer is ten thousand
] x^{4}-4 x^{3} -21-16 x^{2} ÷
H is the answer
..............................
Step-by-step explanation:
to find the sum of nth term
equation is
n/2 ( 2a + (n-1)d) where a is the 1st term and d is the common difference
5/2 ( 120 +( 4 × 31))
5/2 ( 120 + 124)
5/2 × 244
5 × 122 <em>dividing</em><em> </em><em>2</em><em>4</em><em>4</em><em> </em><em>by</em><em> </em><em>2</em>
610
The cost of six filters is 29.94 since each filter costs 4.99