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Maksim231197 [3]
2 years ago
8

A tortoise moves forward 15 meters in one hour. It turns around and crawls 10 meters in the

Mathematics
2 answers:
mr_godi [17]2 years ago
7 0

Answer:

13 meters

Step-by-step explanation:

It went 15 meters, but then it went back 10 meters.

15-10=5

Then it went 8 more meters.

5+8=13

Hope this helped! Please mark brainliest :)

schepotkina [342]2 years ago
5 0

Answer:

Below.

Step-by-step explanation:

15+10+8=33.

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16−5a+2a−1=41−a<br> what is a?
krek1111 [17]

Answer:

a=-13

Step-by-step explanation:

16−5a+2a−1=41−a

16-1-41 = 5a-2a-a

-26 = 2a

a= -26/2

a=-13

7 0
3 years ago
Which of the following statements about f(x)=(x-4)^2-1 are true? select all that apply
melamori03 [73]
We have that
f(x)=(x-4)^2-1  in the question and f(x)=-(x-4)^2-1 in the picture
<span>so

</span><span>I'm going to analyze the two cases
</span><span>
using a graph tool

case 1)
</span>f(x)=(x-4)^2-1<span>
the vertex is the point (4,-1)
the x intercepts are the points (3,0) and (5,0)
the y intercept is the point (0,15)
</span><span>the axis of symmetry is x=4
</span>see the attached figure N 1 

case 2)
f(x)=-(x-4)^2-1
the vertex is the point (4,-1)
there is no x intercepts
the y intercept is the point (0,-17)
the axis of symmetry is x=4
see the attached figure N 2






the answer 
<span>considering the case N 2 </span>is
vertex (4,-1)------> is correct
y intercept  (0,-17)-----> is correct
axis of symmetry x=4-----> is correct


8 0
2 years ago
Read 2 more answers
Two brands of AAA batteries are tested in order to compare their voltage. The data summary can be found below.
garik1379 [7]

Answer:

The 95% confidence interval would be given by 0.281 \leq \mu_1 -\mu_2 \leq 0.529  

Step-by-step explanation:

Previous concepts  

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

\bar X_1 =9.2 represent the sample mean 1

\bar X_2 =8.8 represent the sample mean 2

n1=27 represent the sample 1 size  

n2=30 represent the sample 2 size  

\sigma_1 =0.3 population standard deviation for sample 1

\sigma_2 =0.1 population standard deviation for sample 2

\mu_1 -\mu_2 parameter of interest.

Solution to the problem

The confidence interval for the difference of means is given by the following formula:  

(\bar X_1 -\bar X_2) \pm z_{\alpha/2}\sqrt{\frac{\sigma^2_1}{n_1}+\frac{\sigma^2_2}{n_2}} (1)  

The point of estimate for \mu_1 -\mu_2 is just given by:

\bar X_1 -\bar X_2 =9.2-8.8=0.4

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 and \alpha/2 =0.025, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.025,0,1)".And we see that t_{\alpha/2}=1.96  

Now we have everything in order to replace into formula (1):  

0.4-1.96\sqrt{\frac{0.3^2}{27}+\frac{0.1^2}{30}}=0.281  

0.4+1.96\sqrt{\frac{6^2}{36}+\frac{7^}{49}}=0.519  

So on this case the 95% confidence interval would be given by 0.281 \leq \mu_1 -\mu_2 \leq 0.529  

6 0
3 years ago
Micah recorded the amount of time his mom and dad spend reading bedtime stories. He plotted the data in the box plot below.
katrin [286]

Answer:

The lengths of time that his mom reads are typically longer and have more variability than the lengths of time that his dad reads.

Step-by-step explanation:

The Mom's plot is longer in ranges, therefore, she would have more variability than the dad.

4 0
2 years ago
Read 2 more answers
Will get Brainliest plz help
ladessa [460]

Answer: B

Step-by-step explanation:

An equation is y=mx+b for regular equation stander form. C would automatically be eliminated that leaves you with A and B... a you don't have a y intercept so you would start at zero.

You have to pay an entrance fee plus any other souvenirs you would want. so the entrance fee would be the y intercept in "B"

5 0
2 years ago
Read 2 more answers
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