Question

calcule o valor numérico da expressão 3k+5, quando:
a) k = 10
b) k = -15
c) k = -18
d) k = 9​

Answer 1

Resposta:

$\boxed{\mathsf{ = 35}}}\;\boxed{\mathsf{ = -40}}}\;\boxed{\mathsf{ = -49}}}\;\boxed{\mathsf{ = 32}}}$

Explicação passo-a-passo:

Olá, analima296637.

Neste caso, basta substituir o k na expressão desejada.|

a) k = 10.

$\mathsf{3k+5\;,k = 10}\\\mathsf{ = 3\times 10+5}}\\\mathsf{ = 30+5}}\\\\\boxed{\mathsf{ = 35}}}$

b) k = -15.

$\mathsf{3k+5\;,k = -15}\\\mathsf{ = 3\times (-15)+5}}\\\mathsf{ = -45+5}}\\\\\boxed{\mathsf{ = -40}}}$

c) k = -18.

$\mathsf{3k+5\;,k = -18}\\\mathsf{ = 3\times (-18)+5}}\\\mathsf{ = -54+5}}\\\\\boxed{\mathsf{ = -49}}}$

d) k = 9.

$\mathsf{3k+5\;,k = 9}\\\mathsf{ = 3\times 9+5}}\\\mathsf{ = 27+5}}\\\\\boxed{\mathsf{ = 32}}}$

Dúvidas? Comente.