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Alex Ar [27]
3 years ago
7

What is DE ? Please write answer as a decimal

Mathematics
1 answer:
katrin2010 [14]3 years ago
7 0

Answer:

6,3

Step-by-step explanation:

DE is the midpoint of AC, so take half of 12,6, which is 6,3.

I am joyous to assist you anytime.

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5=x+8 (Sorry but i've been on this one for hours)
DENIUS [597]

Answer:

x = -3

Step-by-step explanation:

Subtract 8 from both sides to get x alone.

5 - 8 = x + 8 - 8

-3 = x

3 0
3 years ago
Read 2 more answers
A veterinarian collects data on the number of times race horses are raced during their careers. The veterinarian finds that the
SpyIntel [72]

Answer:

c. (12.12, 18.48)

Step-by-step explanation:

Hello!

The study variable is X: number of times a racehorse is raced during its career.

The average number is X[bar]= 15.3 and the standard deviation is S= 6.8 obtained from a sample of n=20 horses.

To estimate the population mean you need that the variable has a normal distribution, in this case, we have no information about its distribution so I'll assume that it has a normal distribution. With n=20 the most accurate statistic to use for the estimation is a Students-t for one sample, the formula for the interval is:

X[bar] ± t_{n-1;1-\alpha /2} * \frac{S}{\sqrt{20} }

t_{n-1;1-\alpha /2} = t_{19;0.975}= 2.093

[15.3 ± 2.093 * \frac{6.8}{\sqrt{20} }]

[12.12; 18.48]

Using a significance level of 95% you'd expect that the true average of times racehorses are raced during their career is included in the interval [12.12; 18.48].

I hope it helps!

8 0
3 years ago
A man is 32 years older than his daughter and the product of their ages is 320..
gogolik [260]
A) the man is 40 and the daughter is 8
b)in 8 years when the man is 48 and the daughter is 16
8 0
3 years ago
Find the slope of the given line, if it is defined.
il63 [147K]

Answer:  A. The slope is -\dfrac{4}{3}.

Step-by-step explanation:

The slope of a line helps to specify the direction of the line.

The slope of a line that passes through (a,b) and (c,d) is given by :-

\text{Slope}=\dfrac{d-b}{c-a}

Then the slope of a line passes through origin i.e. (0,0) and (-9,12) is given by :-

\text{Slope}=\dfrac{12-0}{-9-0}\\\\\Rightarrow\ \text{Slope}=\dfrac{12}{-9}\\\\\Rightarrow\ \text{Slope}=-\dfrac{4}{3}

Hence, the slope is -\dfrac{4}{3}.

8 0
2 years ago
PLEASE HELP!!<br><br> Only answer if you're absolutely correct, please and thank you.
Elis [28]

Answer:

1 is multiplication

2 is addition

3 is simplification

4 is division

5 is simplification

Step-by-step explanation:

8 0
1 year ago
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