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Furkat [3]
3 years ago
8

Maria has three children. there are two age diffrence between each child . the total ages of all three is 36 years. rosa is the

youngest how old is rosa
Mathematics
1 answer:
shtirl [24]3 years ago
8 0
R = Rosa's age
r + 2 = next child 
r + 4 = eldest child

r + (r + 2) + (r + 4) = 36

*Substitute '1' for the Rs

1r + 1r + 1r + 2 + 4 = 36

3r + 6 = 36

*Subtract '6' to both sides

3r + 6 - 6 = 36 - 6

3r = 30

*Divide '3' to both sides

\frac{3r}{3} = \frac{30}{3}

r = 10

Rosa is 10 years old.
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Answer: \frac{16}{3}

Step-by-step explanation:

For this exercise it is important to remember  the multiplication of signs:

(+)(+)=+\\(-)(-)=+\\(-)(+)=-\\(+)(-)=-

In this case, given the following expression:

(-8)(-\frac{2}{3})

You can idenfity that both factors are negative. Then, the product (The result of the multiplication) will be positive.

Then, in order to get the product, you need to multiply the numerator of the fraction by -8. So, you get:

 \frac{(-2)(-8)}{3}=\frac{16}{3}

You can notice that the numerator and the denominator of the fraction obtained cannot be divided by the same number; therefore, the fraction cannot be simplified.

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3 years ago
Need help asp please I ready
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Answer:

-4m-3

Step-by-step explanation:

-0.25 times 16 is the same thing as dividing 16 by -4. 16m divided by -4 is -4m

-0.25 times 12 is the same thing as dividing 12 by -4. 12 divided by -4 is -3

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3 years ago
The weights of certain machine components are normally distributed with a mean of 5.19 ounces and a standard deviation of 0.05 o
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Answer:

The  weight that separate the top 8% by 5.2605 and the weight that separate bottom 8% by 5.1195.

Step-by-step explanation:

We are given that

Mean,\mu=5.19

Standard deviation,\sigma=0.05

We have to find the two weights that separate the top 8% and the bottom 8%.

Let x1 and x2 the two weights that separate the top 8% and the bottom 8%.

Z-value for p-value =0.08 =-1.41

For 8% bottom

Z=\frac{x_1-\mu}{\sigma}=-1.41

\frac{x_1-5.19}{0.05}=-1.41

x_1-5.19=-1.41\times 0.05

x_1=-1.41\times 0.05+5.19

x_1=5.1195

For 8% top

p-Value=1-0.08=0.92

Z- value=1.41

Now,

\frac{x_2-5.19}{0.05}=1.41

x_2-5.19=1.41\times 0.05

x_2=1.41\times 0.05+5.19

x_2=5.2605

(x1,x2)=(5.1195,5.2605)

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