Hey there! I'm happy to help!
Let's call the number of weeks w. Since we want their balances, to be equal, we can create an equation.
1000-55w=800-30w
Now we solve for w. We add 30w to both sides.
1000-25w=800
Subtract 1000 from both sides.
-25w=-200
Divide both sides by -25.
w=8
Therefore, Mark and Patricia will have the same amount of money in their savings accounts after 8 weeks.
Have a wonderful day! :D
Answer: 0.25
Step-by-step explanation:
The length of the curve 
is given by
Responder:
1 hora 55 minutos; 22 horas 45 minutos
Explicación paso a paso:
Dado que:
Tiempo el primer día = 15 minutos
Minutos adicionales cada día siguiente = 5 minutos
Número total de días
Usando la fórmula del enésimo término de una progresión aritmética:
Tn = A + (n - 1) d
A = primer trimestre = 15
d = diferencia común = 5
n = enésimo término
Tiempo de nado el último día (n = 21)
T21 = 15 + (21 - 1) 5
T21 = 15 + 20 * 5
T21 = 15 + 100
T21 = 115 minutos
= 1 hora 55 minutos
SEGUNDO.)
Suma de minutos durante las 3 semanas
Suma de n términos:
Sn = n / 2 * (primer término + último término)
Primer término = 15
Último trimestre = a21 = 115 minutos
n = número de términos = 21
Por lo tanto,
Sn = 21/2 * (15 + 115)
Sn = 10,5 * (130)
Sn = 1365 minutos
= 22 horas 45 minutos
Answer:
The common difference is (a.): 9, as you add 9 in order to get to the next number in the sequence each time.
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