gcain9059
14.11.2020 •
Mathematics
Keiko, Juan, and Tony have a total of $80 in their wallets. Keiko has $5 less than Tony. Juan has 3 times what Tony has. How much does each have?
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Ответ:
Step-by-step explanation:
K + J + T = 80
K=T-5
J=3T
T=T
T-5 + 3T + T = 80
5T -5 = 80 --> 5T = 85 --> T = 17
now that u know T=17, substitute the value of T to find K and J
K=(17)-5 = $12
J=3(17) = $51
T= $17
Ответ:
B. 5x^3+4x^2-x-3-5x^2-7x+4=5x^3-x^2-8x+1
C. Polynomials are closed under addition and subtraction...