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keke6361
25.03.2021 •
Mathematics
En 4 años, Jake será dos veces mayor que Jane. Actualmente, Él es tres veces mayor que Jane. ¿Cuántos años tendrá Jake en 5 años?
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Ответ:
17 años
Step-by-step explanation:
Deje que la edad de Jane sea x
Deja la edad de Jake por y
y = 3x 1
y + 4 = 2 (x + 4)
y = 2x + 8 - 4
y = 2x + 4 2
x = y / 3 3
Sustituye 3 en 2
y = 2 (y / 3) + 4
Multiplicar por 3
3y = 2y + 12
3 años - 2 años = 12
y = 12
Pero y = 3x
Por eso;
x = 12/3
x = 4
Dentro de cinco años
Jake = 12 + 5 = 17años
Ответ:
r = 0.81 cm
Step-by-step explanation:
Volume of a cylinder = πxr²xh
Volume = 48cm³
Height = 9 inches = 22.86 cm
Radius = ?
Using the above formula:
V = πr²h
r² = V / (πh)
r² = 48 / (π(22.86))
r² = 48/71.81
r² = 0.67 cm
Taking square root on both sides
r = 0.81 cm Ans