A concert promoter needs to make $43,600 from the sale of 1880 tickets. The promoter charges $20 for some tickets and $30 for the others. Let x represent the number of $20 tickets and y represent the number of $30 tickets.
(a) Write an equation that states that the sum of the tickets sold is 1880.

(b) Write a formula for how much money is received from the sale of $20 tickets?
$

(c) Write a formula for how much money is received from the sale of $30 tickets?
$

(d) Write an equation that states that the total amount received from the sale is $43,600.

(e) Solve the equations simultaneously to find how many tickets of each type must be sold to yield the $43,600.
x =
y =

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.  

$30.32

step-by-step explanation:

65.00*.12=2.80

65.00-2.80=57.20

57.20*1.06=60.632

60.632/2=30.316

too many. (jk)

31 v bucks

step-by-step explanation:

since you bought 25 on friday and 6 on tuesday, you can just add them up.

25+6=31

check your work.

31-6=25

i hope this !

-yand3r3