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kicyunya [14]
3 years ago
11

Katy and her family went to the beach. First, they swam in the ocean for 55 minutes. Then they built sand castles for 1 hour and

55 minutes and played volleyball for 1 hour and 45 minutes. When they finished playing volleyball, it was 2:30 P.M. What time did Katy's family get to the beach?
Mathematics
2 answers:
mash [69]3 years ago
5 0

Answer:

Katy's family got to the beach at 9:55am.

Step-by-step explanation:

In order to find Katy's family's arrival time at the beach, you need to first add amount the amount of time they spent on each activity.  Since there are 60 minutes in one hour, you can add up all the minutes together and then divide by 60 minutes to get the total time in hours:

55 minutes + 115 minutes (1 hr and 55 min) + 105 minutes (1 hr and 45 minutes) = 275 total minutes

275 ÷ 60 = 4 hours and 35 minutes

If Katy's family was done with their activities at 2:30pm, we need to subtract 4 hours and 35 minutes from 2:30pm to get their arrival time.  2:30pm - 4 hours = 10:30am, now subtract another 35 minutes to get 9:55am.

notka56 [123]3 years ago
5 0
The answer is 4 hours and 34 minutes
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18

Step-by-step explanation:

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Please help I'm doing Test Corrections (PHOTO question #14)
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When you divide 48 and 78 by 2, you get 24 and 39. Then divide 24 and 39 by 3 and you will get 8 and 13, which don't have any common factors.

The same happens with 12 and 30...
When 12 and 30 are divided by 2, you get 6 and 15. Then divide 6 and 15 by 3 and you get 2 and 5, which have no more common factors.

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3 years ago
Me pueden ayudar por favor?. Un electricista cobra $3 por hora de trabajo y un plomero $1,2 por hora ¿cuantas horas deberá traba
REY [17]

Answer:

El plomero debe trabajar 25 horas para ganar lo mismo que gana el electricista en 10 horas de trabajo ($30).

Step-by-step explanation:

Para esta pregunta debemos seguir los <em>siguientes pasos</em>:

  1. Determinar los datos principales del problema.
  2. Determinar lo que gana el electricista por trabajar 10 horas.
  3. Determinar las horas que debe trabajar el plomero (considerando lo que gana por hora) para ganar lo mismo que gana el electricista por las 10 horas de trabajo.

En lo siguiente emplearemos la notación USD que es equivalente a $ (USD = $).

Primer paso: datos principales del problema

  • Tenemos que un electricista cobra \\ \frac{USD\;3}{hora}.
  • El plomero cobra \\ \frac{USD\;1.2}{hora}.

Segundo paso: ¿cuánto gana el electricista por trabajar 10 horas?

En este caso, <em>multiplicamos lo que gana el electricista por hora, por las 10 horas de trabajo, </em>y obtener lo que gana en esas 10 horas.

\\ \frac{USD\;3}{hora}*10\;horas

\\ \frac{USD\;3*10\;hora}{hora}

\\ USD\;30

De esta manera, el electricista gana $30 por trabajar 10 horas.

Tercer paso: cantidad de horas que debe trabajar el plomero para ganar $30, considerando lo que gana por hora ($1,2 por hora).

Para determinar el número de horas que el plomero debe trabajar para   ganar $30, podemos escribir la siguiente ecuación:

\\ \frac{USD\;1.2}{hora}*X = USD\;30 [1]

La equación anterior nos dice: ¿qué numero de veces (X) tenemos que multiplicar lo que <em>gana el plomero por hora</em> para que gane $30 (<em>lo mismo que gana el electricista en 10 horas de trabajo</em>)? En otras palabras, la cantidad de horas que tiene que trabajar para ganar $30, considerando que gana $1,2 por hora.

De esta forma, tenemos que despejar <em>X</em> de la ecuación [1], de la siguiente manera, para luego determinar <em>el número de horas que debe trabajar</em>:

\\ \frac{USD\;1.2}{hora}*X = USD\;30

\\ X = \frac{USD\;30}{\frac{USD\;1.2}{hora}}

\\ X = \frac{30}{1.2}\frac{USD}{\frac{USD}{hora}}

\\ X = 25\;horas

Nótese que en las unidades sólo quedan las <em>horas</em> por cuanto \\ \frac{USD}{USD} = 1 y las horas que quedan en el denominador, pasan al numerador, ésto es,  \\ \frac{USD}{\frac{USD}{horas}} = USD*\frac{horas}{USD} = horas.

Por lo tanto, <em>el plomero debe trabajar </em><em>25 horas</em><em> para ganar $30</em> (lo que gana el electricista por 10 horas de trabajo).

El resultado es congruente porque la tasa que cobra por hora de trabajo es mayor para el electricista ($3 por hora) que para el plomero ($1,2 por hora).

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Answer:

The coordinate C:(3,2) and coordinate D:\left ( \dfrac{11}{5},\dfrac{14}{5}, \right )

Step-by-step explanation:

1. The endpoints of AB are A(1,4) and B(6,-1)

If point C divide AB in the ratio 2:3

Formula:

\text{Section formula}(x,y)=\left ( \dfrac{mx_2+nx_1}{m+n},\dfrac{my_2+ny_1}{m+n}, \right )

Where,

(x_1,y_1)\rightarrow A(1,4)

(x_2,y_2)\rightarrow B(6,-1)

m:n\rightarrow 2:3

C:(x,y)

C:\left ( \dfrac{2\cdot 6+3\cdot 1}{2+3},\dfrac{2\cdot -1+3\cdot 4}{2+3}, \right )

C:\left ( \dfrac{12+3}{5},\dfrac{-2+12}{5}, \right )

C:(3,2)

2. The endpoints of AC are A(1,4) and B(3,2)

If point D divide AC in the ratio 3:2

(x_1,y_1)\rightarrow A(1,4)

(x_2,y_2)\rightarrow C(3,2)

m:n\rightarrow 3:2

D:(x,y)

D:\left ( \dfrac{3\cdot 3+2\cdot 1}{2+3},\dfrac{3\cdot -1+2\cdot 4}{2+3}, \right )

D:\left ( \dfrac{9+2}{5},\dfrac{6+8}{5}, \right )

D:\left ( \dfrac{11}{5},\dfrac{14}{5}, \right )

Hence, The coordinate C:(3,2) and coordinate D:\left ( \dfrac{11}{5},\dfrac{14}{5}, \right )

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To learn more on inequalities: brainly.com/question/20383699

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