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Kisachek [45]
3 years ago
8

En un experimento de laboratorio se mezcla dextrosa y agua en varios recipientes, con la condición de que la concentración de de

xtrosa debe ser igual en todos los recipientes.
Juan tiene un recipiente que contiene 18dl de agua;
Pedro tiene un recipiente que contiene 10dl de agua;
David tiene un recipiente que contiene 8dl de agua;
Isabel tiene un recipiente que contiene 20dl de agua;
Berta tiene un recipiente que contiene 16dl de agua;
Laura tiene un recipiente que contiene 6 dl de agua.


El resultado es el siguiente:


Juan agrega al recipiente 45 g de dextrosa;
Pedro agrega al recipiente 25 g de dextrosa;
David agrega al recipiente 20 g de dextrosa;
Isabel agrega al recipiente 50 g de dextrosa;
Berta agrega al recipiente 35 g de dextrosa;
Laura agrega al recipiente 15 g de dextrosa.


En la experiencia, uno de los participantes ha cometido un error. ¿Quién se ha equivocado?
Mathematics
1 answer:
sashaice [31]3 years ago
6 0

Answer:

4give me I need the points T_T

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How do I solve this literal equation? <br> 15 points
kati45 [8]

Answer:

\pi = \frac{A}{2r^2 + 2rh}

Step-by-step explanation:

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A=2\pi r^2 + 2\pi rh\\A=\pi (2r^2 + 2rh)

Now, since we want \pi in terms of the other variables, we can divide the left hand side (A) by whatever is multiplied with \pi on the right hand side. Then we will have an expression for \pi. Shown below:

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7 0
3 years ago
Mateo reproducira una foto que mide 5 cm por lado a una escala de 3/4
Aneli [31]

the question in English

Mateo will reproduce a photo measuring 5 cm per side on a scale of 3/4

How much will the square side of the copy measure?

Will the size of the copy be larger or smaller than the original?

we know that

the scale factor is equal to \frac{3}{4}

Let

x----------> the original length side

y--------> the copy length side

y=\frac{3}{4}*x

we have that

x=5\ cm

substitute the values

y=\frac{3}{4}*5=3.75\ cm

therefore

<u>the answer Part a) is </u>

the length side of the copy measure is 3.75\ cm

Part b)

we know that

the size of the original photo is------> 5*5=25\ cm^{2}

the size of the copy is------> 3.75*3.75=14.06\ cm^{2}

so

14.06\ cm^{2} < 25\ cm^{2}

therefore

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The size of the copy be smaller than the original



3 0
3 years ago
Given: \overline{AC} \perp \overline{BD} AC ⊥ BD and \overline{BD} BD bisects \overline{AC}. AC . Prove: \triangle ABD \cong \tr
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Answer:

The Proof for

△ABD ≅ △CBD is below

Step-by-step explanation:

Given:

\overline{AC} \perp \overline{BD}

\overline{BD} \ bisects\  \overline{AC}

AD = CD      .........BD bisect AC

To Prove:

△ABD ≅ △CBD

Proof:

In  ΔABD  and ΔCBD  

BD ≅ BD              ....……….{Reflexive Property}

∠ADB ≅ ∠CDB    …………..{Measure of each angle is 90°( \overline{AC} \perp \overline{BD} )}

AD ≅ CD              ....……….{ \overline{BD} \ bisects\  \overline{AC} }

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