Alessandra calculou corretamente o valor da expressão algébrica 5 • + 6 • , para = -7 e =4. Qual é o resultado que ela encontrou?
-49
11
-11
49
Answers
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Given :
Alessandra correctly calculated the value of the algebraic expression 5 x + 6y for x = -7 and y = 4.
To Find : What is the result she found?
-49
11
-11
49
Solution
5 x + 6y
x = - 7
y = 4
Substitute values of x and y in expression
5( -7) + 6(4)
= -35 + 24
= - 11
5 x + 6y = - 11 if x = - 7 and y = 4
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