Question

calcule o valor numérico das expressões algébricas ​

Answer 1

Explicação passo-a-passo:

a) 4.4 +3= 16 +3= 19

b) 5.3 -1= 15 - 1= 14

c) 8.2 -5= 16 - 5= 11

d) 2.8 + 10= 16 +10= 26

Answer 2

$\large\boxed{\begin{array}{l}\sf Para~calcular~o~valor~num\acute erico~de~uma~\\\sf express\tilde ao~alg\acute ebrica~devemos~substituir\\\sf a~letra~pelo~valor~fornecido~no~exerc\acute icio\\\sf em~seguida,calcular~a~express\tilde ao~num\acute erica\\\sf correspondente.\end{array}}$

$\large\boxed{\begin{array}{l}\tt a)~\sf 4x+3,~~para~x=4\\\sf substituindo~x~por~4~temos:\\\sf 4\cdot4+3=16+3=19\\\tt b)~\sf 5x-1,~~para~x=3\\\sf substituindo~x~por~3~temos:\\\sf 5\cdot3-1=15-1=14\\\tt c)~\sf 8x-5,~~para~x=2\\\sf 8\cdot2-5=16-5=11\\\tt d)~\sf 2x+y,~~para~x=8~e~y=10\\\sf substituindo~x~por~8~e~y~por~10~temos:\\\sf 2\cdot8+10=16+10=26\end{array}}$