A store sells wrapping paper for $3, greeting cards for $2, and ribbon for $1. The soccer team buys 15 rolls of wrapping paper, 10 greeting cards, and 12 rolls of ribbon.
a. Write an expression to find the total cost of the soccer team's purchase.
b. How much did the soccer team spend?

A) (15 x $3) + (10 x $2) + (12 x $1) = X

B) $77      

Step-by-step explanation:

A) Each wrapping paper is 3 dollors, and they bought 15 (15 x 3)

Each greeting card is 2 dollors, and they bought 10 (10 x 2)

Each roll of ribbon is 1 dollors, and they bought 12 (12 x 1)

B) 15 times 3 is 45

10 times 2 is 20

12 x 1 is 12

45 + 20 + 12 = 77

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.