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ch4aika [34]
3 years ago
10

There are 72 girls playing in the playground 3/7 of the children in the playground are boys how many children are playing in the

playground altogether show your working out.
Mathematics
1 answer:
kogti [31]3 years ago
6 0
Fraction of girls =  1 - 3/7 = 4/7 

4/7 is equivalent to 72 girls
1/7  ..  ..  .............   72 / 4 = 18
Total number of children = 7/7   = 18*7 =  126 Answer
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Someone help me with this. I forgot my notes in class
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Step-by-step explanation:

Since AB = BC the the triangle is isosceles and thus

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Un terreno de 4200 metros cuadrados de superficie se quiere dividir en dos lotes de manera que el lote menor sea tres cuartas pa
lions [1.4K]

Answer:

El lote menor tendrá 1800 m^2

El lote mayor tendrá 2400 m^2

Step-by-step explanation:

Definamos las variables:

M = superficie del lote mayor

m = superficie del lote menor.

Sabemos que el terreno tiene en total 4200 m^2

Entonces:

M + m = 4200 m^2.

Y queremos que el lote menor sea 3/4 del lote mayor, entonces:

m = (3/4)*M

Podemos reemplazar esto en la ecuación de arriba para obtener:

M + ( (3/4)*M) = 4200 m^2.

Y ahora podemos resolver esto para M

M + (3/4)*M = 4200m^2

M*(1 + 3/4) = 4200m^2

M*(4/4 + 3/4) = 4200 m^2

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Esto significa que la superficie del mayor lote es 2400 m^2

Y la superficie del menor se puede obtener con la ecuación:

m = (3/4)*M

m = (3/4)*2400m^2 = 1800m^2

La superficie del lote menor es 1800m^2

4 0
2 years ago
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