6x(8+10-12+15-20)=
no recuerdo como se realiza, por favor darme un ejemplo.

Solución:

Después de simplificar esta ecuación, el solución es 6 x 1 o 6.

Explicación:

Para encontrar la respuesta, debemos simplificar los términos entre paréntesis.

6 x (8 + 10 - 12 + 15 - 20)

6 x (18 - 12 + 15 - 20)

6 x (6 + 15 - 20)

6 x (21 - 20)

6 x (1)

Luego te quedas con 6 x 1, o 6.

41

Step-by-step explanation:

6x8=48+10=58-12=46+15=61-20=41

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

we need to divide the number of toy dinosaurs, 156, by the number of brothers, 4:

in order to estimate, we can use compatible numbers:

156 ÷ 4

  ↓

160   ÷ 4 = 40        

the correct answer is a).