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leva [86]
3 years ago
8

Jalissa bought a backpack for $30 and n notebooks for $2.50 each.

Mathematics
2 answers:
meriva3 years ago
5 0
F(n) = 2.50n + 30....f(n) also represents y...so if u wanted to write y = 2.50n + 30...it would be the same.

if she spent 40....

40 = 2.50n + 30
40 - 30 = 2.50n
10 = 2.50n
10/2.50 = n
4 = n.....so she bought 4 notebooks
Elis [28]3 years ago
4 0
Y=2.5x+30 - the function where y = the total cost and x = the # of notebooks.

40 = 2.5x + 30 - Plug 40 into y and solve
10= 2.5x
x = 4, the number of notebooks she bought


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