Mathematics: Amy,ruben,and sam have a total of $71 in their wallet. sam has 3 times what reuben has. reuben has $9 more than amy. how much do they have in their wallets?

Amy,ruben,and sam have a total of $71 in their wallet.

Ответ:

roseemariehunter12

04.01.2022

Total = amount Amy has(A) + amount Ruben has(R) + amount Sam has(S)
S = 3 * R
R = A + 9

S = 3 * (A+9)
S = 3A + 27

71 = A + (A + 9) + (3A + 27)
71 = 5A + 36
5A = 35
A = $7

R = A + 9
R = 7 + 9
R = $16

S = 3 * R
S = 3 * 16
S = $48

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Ответ:

gennhill14

16.11.2022

Mathematics

f(g(x)) = 9x^2 - 3x - 4

Step-by-step explanation:

Assuming it’s

f(x) = x^2 + 3x - 2

and g(x) is linear:

f(g(x)) = (3x - 2)^2 + 3(3x - 2) - 2

= 9x^2 -12x + 4 + 9x - 6 - 2

= 9x^2 - 3x - 4

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Amy,ruben,and sam have a total of $71 in their wallet. sam has 3 times what reuben has. reuben has $9 more than amy. how much do they have in their wallets?

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