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Tamiku [17]
3 years ago
8

A família Oliveira consiste no pai, na mãe e em alguns filhos. A idade média da família é de 18 anos. Sem contar com o pai, que

tem 38 anos, a idade média familiar diminui para 14 anos. Quantos filhos tem a família Oliveira? a) 2 b) 3 c) 4 d) 5 e) 6
Mathematics
1 answer:
Vladimir79 [104]3 years ago
3 0

Answer: e) 6

Step-by-step explanation:

Let x be mother + children = 18

Father's age = 38

Average age of the family = 14

38 + 18x /( x + 1 )= 14

Opening the bracket

38 + 18x = 14x + 14

Collecting like terms

24 = 4x

x = 6

no of children in the family is 6.

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Aleks [24]

First, I'd like to say that this question is flawed because the diameter of the spool changes as you pull the line out. Some would argue it's negligible I suppose.

At any rate, assuming there's a magic spool where the diameter doesn't change, let's find the cicumference so we can find the length of one wrap around the spool.

circumference = 2*pi*r = 2 * pi * 4cm = about 25.133 cm

Now if it turns 16 times we'll have 16 times the circumference.

16 * (25.133 cm)

= 402.128 cm

8 0
3 years ago
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If c ī b, what is m<2?
natulia [17]

Answer:

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Step-by-step explanation:

If the lines are perpendicular, the angles are 90 degrees

3 0
3 years ago
If h(x) = (f o g)(x) and h(x) = sqrt(x+5), find g(x) if f(x) = sqrt(x+2)
agasfer [191]

Answer:

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Step-by-step explanation:

<h3>Given</h3>
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  • h(x) = \sqrt{x+5}
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<h3>To find</h3>
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<h3>Solution</h3>

<u>We know that:</u>

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<u>Substitute x with g(x) and solve for g(x):</u>

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3 years ago
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grin007 [14]

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0 = -1/6(2) + b

0 = -1/3 + b

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Can anyone help me out with question 6. ASAP prefer teachers but if you know let me know thx!
SVETLANKA909090 [29]

You can take in x values starting from -4 to 4. Substitute the x values in the equation and find the y values.

Using the values, you can plot the line.

Easy :)

7 0
3 years ago
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