Two customers went to a post office to buy postcards and large envelopes. each postcard
costs the same amount, and each large envelope costs the same amount.
the first customer paid $12 for 14 postcards and 5 large envelopes.
the second customer paid $24.80 for 10 postcards and 15 large envelopes.
•
what was the cost in dollars of each large envelope?
a $1.42 c $1.15
b $0.35 d $0.63

-4, -2, 1, 4

step-by-step explanation:

domain = x values

range = y values

$15.40 per mile

step-by-step explanation:

you have to round up to 4 because 6 is over 5 so you have to round the 3 up to 4

i'm not really sure how to answer that

step-by-step explanation:

1. when "a" is a root of a polynomial, (x -a) is a factor of it. for the three roots given, the factors of the desired polynomial are (x +2)(x -1/2)(x -3).

in order to make the leading coefficient be negative, we need to multiply this product by a negative number. any negative number will do, but we choose a small (magnitude) value that will eliminate the fraction: -2.

then

f(x) = -2(x +2)(x -1/2)(x -3) = -(x +2)(2x -1)(x -3)

= -(2x² +3x -2)(x -3)

= -(2x³ -3x² -11x +6)

f(x) = -2x³ +3x² +11x -6

2. a graph created by the desmos on-line graphing calculator is shown, and the zeros are highlighted.

3. as indicated in part 1, the multiplier of this equation can be anything and the zeros will remain the same. you want a negative leading coefficient, so the "anything" is restricted to any of the infinite number of numbers that will make that be the case.