Para realizar uma festa, Viviane comprou, em uma fábrica, 16
pacotes de salgadinhos e
9
caixas de docinhos, pagando
R
$

420
,
00
por essa compra. Durante a festa, ela resolveu comprar, nessa fábrica, mais
5
pacotes de salgadinhos e mais
3
caixas de docinhos e pagou
R
$

135
,
00
por essa segunda compra. Cada pacote de salgadinhos vendido nessa fábrica custa o mesmo preço, assim como cada caixa de docinhos tem o mesmo valor.

Qual é o preço, em reais, de cada pacote de salgadinhos vendido nessa fábrica?

Resposta:Letra a)R$ 15,00Explicação:Confia

region b will make the inequalities y < 2x + 1 and y > -x - 2 true ⇒ answer a

step-by-step explanation:

* lets study the graph and the inequality to solve the question

- the inequality y > -x - 2

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = -2 that means the line intersect the y-axis at point (0 , -2)

∵ the sign of the inequality is >

∴ we shad the part over the line

  region a and b

- the inequality y < 2x + 1

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = 1 that means the line intersect the y-axis at point (0 , 1)

∵ the sign of the inequality is <

∴ we shad the part under the line

  region b and c

∵ the common region between the two lines is region b

∴ region b will make the inequalities y < 2x + 1 and y > -x - 2 true