Type the correct answer in each box. Consider these quadratic expressions:

A. -3x2 + 11x − 3

B. 11x2 − x + 10

C. 4x2 + 27x − 28

D. -3x2 + 11x + 31

For each polynomial operation, write the letter that corresponds to the resulting expression from the list.

(5x2 + 2x + 1) + (6x2 − 3x + 9) is equivalent to expression .

(-3x2 + 6x − 12) + (5x + 9) is equivalent to expression .

(8x + 16) − (3x2 − 3x − 15) is equivalent to expression .

(5x2 + 23x − 7) − (x2 − 4x + 21) is equivalent to expression .

explanation:

remove parenthesis:

=

apply rule

=

multiply fractions:

=

=

divide:

=

mordancy.

answer: 1+1

step-by-step explanation: 1+1 is at least 2

0 and 5 minutes

step-by-step explanation:

given that one morning eight buses arrive late by the number of minutes given below:

0 8 2 6 9 2 0 7 8

write these in ascending order

0   0 2 6 7 8 8 9

in the afternoon two more buses arrive at the bus stop say by x and y minutes late.

total number of buses = 10

median = average of 4th and 5th after arranging in ascending order

since 4th entry is 6, the values of x and y should be below 6

also given 0 is the mode so either x or y or both should be 0 because then only 0 gets the maximum frequency and hence mode

thus we have

0 0 0 2 6 7 8 8 9 and another unknown entry which is below 6.

since median is 3.5, we have the unknown entry to be 5 only because then only median =( 2+5)/2

thus the after noon buses were late by 0 and 5 minutes.