The sum of −15x2 −5x + 11 and another polynomial expression is −9x2 + 3x −10. what is the other polynomial expression? a)24x2  + 8x − 8b)6x2  + 8x − 21c)− 24x2  + 8x + 8d)− 24x2  + 8x − 8

B

Step-by-step explanation:

To find the missing term, subtract the given term from the sum.

(−9x2 + 3x −10)−(−15x2 −5x + 11)

−9x2 + 3x −10 + 15x2 + 5x − 11

6x2 + 8x − 21

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step-by-step explanation:

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answer: - (a)

(b) 88 seats

step-by-step explanation:

given: in an auditorium, there are 22 seats in the first row and 28 seats in the second row.

thus first term=

second term=

the number of seats in a row continues to increase by 6 with each additional row.

⇒d= 6

a) given formula :

b)   let the number of seats (n) = 12

substitute n=12 in the explicit rule formed in (a)

∴there are 88 seats in 12 rows.