1. Resuelvan las siguientes multiplicaciones y divisiones. a. −3 . (−5) = +8d. −18 : (−6) = g. −45 : (−5) = b. −8 . 2 = e. −15 . 0 = h. −2 . (−10) = c. 5 : (−1) = f. −32 . 2 = i. 40 : (−8) =
2. Unan con una flecha cada cálculo con su resultado, cuando sea posible. a. −16 : (–8) . 8 = • 1
b. −2 . (−4) : (−1) = • 8
c. −2 . 4 : (−1) = • −1
d. −5 . (−6) : (−3) = • 10
e. −5 . 6 : (−3) = • −8
f. −6 . 2 : 12 = • −10
g. 25 : (–1) : (–25) = • 16
3. Resuelvan las siguientes operaciones.
a. 3 . (−8) . (−2) = f. −48 : 8 . (−1) = b. −10 . 2 : (−5) = g. −140 : 5 : (−7) = c. −42 : (−6) . (−1) = h. −220 : (−2) . 3 = d. −4 . (−2) . (−5) = i. 81 : (−9) : (−3) = e. −1 . (−70) : 35 = j. 38 : 19 . (−453) =
4. Escriban V (Verdadero) o F (Falso).
a. El producto entre dos números enteros negativos es negativo.
b. El cociente entre un número entero (diferente a cero) y su módulo siempre es 1. c. El producto entre dos enteros positivos es positivo.
d. El producto entre tres enteros negativos es positivo.
e. El cociente entre un entero negativo y su opuesto es siempre −1.

answer: '

the distance between points l and m

step-by-step explanation:

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.