Answer:
67 monedas de 5, 34 de 10 y 11 de 25.
Step-by-step explanation:
Representemos el primer enunciado de manera algebraica:
(1)
Donde:
- x es el numero de monedas de 5
- y es el numero de monedas de 10
- z es el numero de monedas de 25
Ahora, el número de monedas de 10 centavos era el triple de las de 25 centavos y que las de 5 centavos era el doble de las de 10 centavos, se puede representar como:
(2)
(3)
Combinado las eacuaciones (1), (2) y (3) tenemos:
Por lo tanto el valor de x y z seran:
Si ponemos cada valor en la equacion (1), tenemos:
Como el resultado da 955 hay un excedente de 5 pesos, asi que finalmente tendremos.
x = 67
y = 34
z = 11
Espero te haya serrvido!
Answer:
see below
Step-by-step explanation:
Let C = chess
S = swimming
F = football
x = football only
y = all three sports
z = swimming only
x+y+ 8+12 = 32 those who like football
y+z+8+16 = 40 those who like swimming
7+x+8+y+12+10+16+z = 72 all children
Simplifying these equations
x+y = 32-20 = 12
y+z = 40-24 = 16
x+y +z = 72-53 = 19
Substituting x+y = 12 into the last equation
12 +z = 19
z = 7
y+z = 16
y = 9
x+y =12
x =5
Swimming only is 7
Football only is 5
Swimming and football y+8 = 9+8 = 17
P( chess or swimming but not football) = (10+16+z)/ total
=(10+16+7)/ total
=33/72
P( no active sport) = chess only or no sport/total
=(10+7)/72
1) 1 Quarter, 2 Dimes, 2 Nickles, 10 Pennies
2) The ninth floor is 3 times as far from the ground as the third (9/3)
3) That number is 20 (20/2 = 10, 20*2 = 40, 40-10 = 30)
4) 1 Bracelet is $9 (If 2 rings are $12 then 1 ring will be $6. $36 - $18 = $18 2 bracelets = $18)
5) Addie weighs 4oz Missy weighs 14oz Corky weighs 8oz(A + M = 18, M + C = 22, A + C = 12. )
don't expect people to do 6 questions for the points of 1 question.
<span>The pre-image and image are congruent. The y-coordinates change. The x-coordinates change. </span>
Answer:Step 3
Step-by-step explanation:
