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cricket20 [7]
3 years ago
8

Can somebody help me out please !

Mathematics
1 answer:
Agata [3.3K]3 years ago
4 0

Answer:

Part A

5yr old boy.

Y=-(1/8)x+113/8 x=5

Y=-5/8+113/8=(113-5)/8=108/8

Y=13.5 hrs

Yes the estimated value of sleep by this function is reasonable as it is close to childhood more sleep is likely.

Part B

20yr old boy.

Y=-(1/8)x+113/8 x=20

Y=-20/8+113/8=(113-20)/8=93/8

Y=11.63 hrs

No the estimated value of sleep by this function is not reasonable as the normal sleep of 7-8 hrs is enough for adults.

Step-by-step explanation:

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In Triangle DEF, if angle D is congruent to angle E, DE= x + 4, EF= 4x - 8, and DF= 7X - 35 find X and the measure of each side
zaharov [31]

If angle D is congruent to angle E, then the triangle DFE is an isosceles triangle (look at the picture).

Therefore DF ≅ EF.

DE = x + 4, EF = 4x - 8, DF = 7x - 35

The equation:

7x - 35 = 4x - 8       <em>add 35 to both sides</em>

7x = 4x + 27       <em>subtract 4x from both sides</em>

3x = 27        <em>divide both sides by 3</em>

x = 9

DE = x + 4 → DE = 9 + 4 = 13

EF = 4x - 8 → EF = 4(9) - 8 = 36 - 8 = 28

DF = 7x - 35 → DF = 7(9) - 35 = 63 - 35 = 28

<h3>Answer:</h3><h3>x = 9, DE = 13, EF = 28, DF = 28.</h3>

6 0
4 years ago
Mrs wang is 23 years older than her daughter. I’m 5 years, their age will total 63. How old is each now?
Rom4ik [11]

Answer:

Mrs. Wang is 38 years old and her daughter is 15 years old.

Step-by-step explanation:

Explanation:

Let

x

=

the daughter's age

Mrs. Wang is

23

years older, so her age is

x

+

23

In five years, the daughter will be

x

+

5

years old

In five years, Mrs. Wang will be

x

+

23

+

5

=

x

+

28

years old

And, in five years the sum of their ages will be 63, so...

x

+

5

+

x

+

28

=

63

Combine like terms

2

x

+

33

=

63

a

a

−

33

a

−

33

a

a

a

Subtract 33 from both sides

2

x

a

a

a

a

a

=

30

2

x

2

=

30

2

a

a

a

Divide both sides by 2

x

=

15

a

a

a

The daughter is 15

x

+

23

=

15

+

23

=

38

a

a

a

Mrs. Wang is 38

8 0
4 years ago
Which quadratic function has one real solution?
Harman [31]
1 real solution means that it has a multiplicity aka
if r is the solution
0=(x-r)^m

theone that fits that is B, the solution is x=3

B is answer
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4 years ago
Find the value of x that makes p||q
skelet666 [1.2K]

Answer:

20

Step-by-step explanation:

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5 0
3 years ago
A sample of students was asked what political party do they belong. which of the following types of graphical display would be a
inna [77]

Answer:

B. Pie chart.

Step-by-step explanation:

In this question, the students are asked what political party they belong. The best display format would be one in which the graph can be divided into parts, or percents, according to the percentage of students belonging to each political party. The graph that best describes this, distributing a group into parts, is a pie chart, and thus, the correct answer is given by option b.

Scatterplot is used when two variables correlate together, that is, there is a relationship between them, which we don't have between the number, or proportion of students belonging to each political party. Stemplot are used when there is a high number of quantitative data, which we do not have here.

5 0
3 years ago
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