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BabaBlast [244]
2 years ago
15

Simplify the expression 6h+​(−7.7d​)−18+5d−2.8h.​

Mathematics
2 answers:
g100num [7]2 years ago
7 0
Answer : -2.7d+3.2h-18

Please leave a thanks <3
Marina86 [1]2 years ago
7 0
Use Photomath it gives out detailed answers
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Write the simplest form of the expression (64/729)^(−1/6)
a_sh-v [17]

Answer:

3/2

Step-by-step explanation:

(64/729)^(−1/6)=(2^6/3^6)^(-1/6)=(2/3)^-1=3/2

5 0
2 years ago
Toyota advertises that their Toyota Highlander Hybrid provide 28 MPG. To test this, an experiment involving a sample of 20 Toyot
klemol [59]

Answer:

We accept the null hypothesis.    

Step-by-step explanation:

We are given the following in the question:

Sample mean, \bar{x} = 28.8 miles per gallon

Sample size, n = 120

Alpha, α = 0.01

Sample standard deviation, σ = 6.89 miles per gallon

First, we design the null and the alternate hypothesis

H_{0}: \mu = 28\text{ miles per gallon.}\\H_A: \mu \neq 28\text{ miles per gallon.}

We use Two-tailed t test to perform this hypothesis.

Formula:

t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n-1}} }

Putting all the values, we have

t_{stat} = \displaystyle\frac{28.8 - 28}{\frac{6.89}{\sqrt{19}} } = 0.5061

Now, t_{critical} \text{ at 0.01 level of significance, 19 degree of freedom } =\pm 2.8609 Since,            

-2.609 < t_{stat} < 2.8609

We fail to reject the null hypothesis and accept it.

We accept the null hypothesis and the population mean MPG of Toyota Highlander Hybrid vehicles is equal to 28 miles per gallon.

5 0
2 years ago
Katherine has 32 pop songs and 72 rock songs on her mp3 player that she will be organizing into playlists. She wants to put an e
ruslelena [56]

Answer:

Katherine will make minimum 8 playlists. Each playlist will contain 4 pop songs and 9 rock songs.

Step-by-step explanation:

We have been given that Katherine has 32 pop songs and 72 rock songs on her mp3 player. She is willing to organizing the songs into playlists such that there are equal number of pop songs and an equal number of rock songs into each playlist.

We can find the minimum number of playlists by finding GCF of the given two numbers.

We can write 32 = 2^5 and we can write 72 = 2^3*3^2

Therefore, GCF of the two numbers is 2^3 = 8.

Hence, she will be making total 8 playlists where each playlist will contain 4 pop songs and 9 rock songs.

6 0
2 years ago
If you have a stack of pennies without counting them how do you know if there is an even or odd number of them
zavuch27 [327]

If I have a stack of pennies. And I have to tell that without counting whether there are even number of pennies or odd.

Even numbers are the numbers which are divisible by 2 and odd numbers are the numbers which are not divisible by 2.

Then I will put the given pennies in 2 rows and then I will match them to form a pair of 2 pennies. After matching, if there is 1 penny left over, then there is an odd number of pennies and if all the pennies have a match,then there is an even number of pennies.

5 0
2 years ago
Walter is making a 300-mile trip from Wichita Falls, Texas to Austin, Texas. After the first 120 miles, he continues driving at
kkurt [141]

Answer:

about 135 more miles to go

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
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