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Vlad [161]
3 years ago
7

sean drank 2/3 of water on Monday before going jogging. he drank 3/7 liter of water after his jog. how much did sean drink all t

ogether. write this as a mixed number
Mathematics
2 answers:
lakkis [162]3 years ago
6 0

Answer:

add up all the fractions

2/3 + 3/7 = 23/21

Writing it as a mixed number,

23/21 = 1 2/21

hope this helps :)

zhenek [66]3 years ago
3 0

Answer:

1  2/21

Step-by-step explanation:

create common denominators

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ethan earned 5% of the maximum number of points possible . It ethan earned 40 points , what is the maximum number of points poss
Morgarella [4.7K]

Answer:

3840

Step-by-step explanation:

4 0
2 years ago
People tend to evaluate the quality of their lives relative to others around them (Frieswijk et al., 2004). In one study, resear
Alborosie

Answer:

Step-by-step explanation:

Hello!

Research.

n=9 frail elderly were interview and compared to a fictitious person who was worse off then the interviewee, a life-satisfaction score was determined for each person.

18, 23, 24, 22, 19, 27, 23, 26, 25

Assuming that the population average score is μ= 20, the researchers think that the elderly in the sample are more or less satisfied than others in the general population.

a. You have the information of one sample, assuming this sample has a normal distribution and each elderly interviewed is independent, then the t-test of choice is a one-sample t-test.

b. and c. If you say that the elderly are "more or less" satisfied than the others, this means that they are either as satisfied as to the general population or not satisfied as to the general population. Symbolically:

H₀: μ = 20

H₁: μ ≠ 20

This is a two-tailed test, meaning, you will have two critical regions.

d.  

α: 0.05

Left critical value: t_{n-1;/\alpha 2} = t_{8; 0.025}= -2.306

Right critical value: t_{n-1;1-\alpha /2} = t_{8;0.975} = 2.306

e.

t_{H_0}= \frac{X[bar]-Mu}{\frac{S}{\sqrt{n} } } ~t_{n-1}

X[bar]= 23

S= 3

t_{H_0}= \frac{23-20}{\frac{3}{\sqrt{9} } }= 3

f.

Considering that the calculated t-value is greater than the right critical value, the decision is to reject the null hypothesis, so using a significance level of 5% you can conclude that the average life-satisfaction score of the elderly is different than 20.

I hope it helps!

7 0
3 years ago
Help please!!!! thank you in advance. asap too​
qaws [65]
You can check the following
C=4
C=5
C=11
4 0
2 years ago
Can I have the answer to this question please
Crazy boy [7]

answer = 9c²d^8

(3cd^4)^2

=(3)^2 × c^2 × (d^4)^2

=9×c^2×d^8 ----law of indices (a^m)^n = a^mn

=9c²d^8

6 0
3 years ago
What is the best answer to solution of x^2 + 16 = 0?​
kolezko [41]

Answer:

4. C. x = 4 or -4

Step-by-step explanation:

since both terms are perfect squares, factor using the difference of squares formula, a² - b² = ( a + b )  ( \alpha - b ) where

5 0
3 years ago
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