Nguyen Alexander
02/22/2023 · Middle School
1. Halla el valor numérico para \( a=4 \) de cad expresión algebraica. A. \( 4 a-2 a+10 \) B. \( a / 2 * 4 a-a \) C. \( 3 a^{2}+5 a \)
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Step-by-step Solution
Para encontrar el valor numérico de las expresiones algebraicas cuando \( a = 4 \), vamos a sustituir \( a \) por 4 en cada una de las expresiones.
A. \( 4a - 2a + 10 \)
Sustituyendo \( a = 4 \):
\[
4(4) - 2(4) + 10 = 16 - 8 + 10 = 18
\]
B. \( \frac{a}{2} \cdot 4a - a \)
Sustituyendo \( a = 4 \):
\[
\frac{4}{2} \cdot 4(4) - 4 = 2 \cdot 16 - 4 = 32 - 4 = 28
\]
C. \( 3a^{2} + 5a \)
Sustituyendo \( a = 4 \):
\[
3(4^{2}) + 5(4) = 3(16) + 20 = 48 + 20 = 68
\]
Resumiendo los resultados:
A. \( 18 \)
B. \( 28 \)
C. \( 68 \)
Quick Answer
A. \( 18 \)
B. \( 28 \)
C. \( 68 \)
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