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FrozenT [24]
2 years ago
5

L'età media di Aldo, Bruno, Carlo e Davide è 16 anni. Se non si tiene conto di Davide, l'età media dei tre rimanenti sale a 18.

Qual è l'età di Davide? ​
Mathematics
1 answer:
photoshop1234 [79]2 years ago
4 0

Answer:

Davide's age is 10.

L'età di Davide è 10.

Step-by-step explanation:

The average age of Aldo, Bruno, Carlo and Davide is 16 years.

I am going to say that:

x is Aldo's age.

y is Bruno's age.

z is Carlo's age.

w is Davide's age.

Average of the 4 is 16 years.

This means that:

16 = \frac{x + y + z + w}{4}

x + y + z + w = 64

If we do not consider Davide, the mean is 18. So

18 = \frac{x + y + z}{3}

x + y + z = 54

Replacing in the first equation:

x + y + z + w = 64

54 + w = 64

w = 10

Davide's age is 10.

L'età di Davide è 10.

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Answer:

1st option: 113.04 cm³

Step-by-step explanation:

Volume of sphere= \frac{4}{3} \pi {r}^{3}

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7 0
2 years ago
Carlie runs two different business. She needs to pay $100 for materials, and pay her associates $12 per hour for her childcare b
V125BC [204]

Answer:

C(x) = 100 + 12x

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Step-by-step explanation:

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8 0
2 years ago
If ce = 7x+4, find the value of x
Alex787 [66]

Hey there,

To find the value of x we can take the two, CD or DE and set them equal to CE.

First step is set the lines equal to each other:

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Now we combine like terms:

  • 9x - 6 = 7x + 4

Then we subtract 7x from both sides:

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Add 6 to both sides:

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Lastly we divide both sides by 2:

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So the value of x would have to be 5.  

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7 0
2 years ago
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Emanuel surveyed a random sample of 505050 subscribers to Auto Wheel magazine about the number of cars that they own. Of the sub
Anna [14]

Answer:

The most reasonable estimate for the number of Auto Wheel magazine subscribers who own fewer than 2 is 102

Step-by-step explanation:

We can build an estimate from a sample, and this estimate will be the best estimate for the proportion of the population.

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50 subscribers

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The most reasonable estimate for this number is 0.3*340.

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The most reasonable estimate for the number of Auto Wheel magazine subscribers who own fewer than 2 is 102

4 0
2 years ago
Stacy wants to build a patio with a small, circular pond in her backyard.The pond will have a 6-foot radius. She also wants to i
Komok [63]
We know that

step 1
the area to install tiles is equal to A
A=area rectangle-area of a circle

area of a rectangle=(13+x)*x-----> (13x+x²) ft²

area of a circle=pi*r²-----> pi*6²------> 36*pi ft²
A=(x²+13x)-36*pi  ft²

step 2
find the cost of installing tiles CT
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step 3
find the cost <span>the of installing the pond CP
CP=$0.62*36*pi------> CP$22.32*pi

step 4
find the inequality
we know that
CT+CP </span>\leq<span> $536
[</span>$x²+$13x-$36*pi]+[$22.32*pi]  \leq $536

[$x²+$13x-$13.68*pi]  \leq $536

the answer is the option D
4 0
2 years ago
Read 2 more answers
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