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Pepsi [2]
3 years ago
5

Please need help on this question.

Mathematics
1 answer:
Stella [2.4K]3 years ago
8 0

Answer:

(4,5)

Step-by-step explanation:

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Sergio039 [100]
Yes They are correct
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3 years ago
Read 2 more answers
PLEASE HELP - One of the solutions to the x to the second power -14x + 45 =0 is x=5. What is the other solution?
Advocard [28]

Step-by-step explanation:

x^2 -14x + 45 =0

look for two numbers that their :

sum= - 14 (-5 & -9)

products = 45 (-5 & -9)

so,

(x-5)(x-9)=0

thus,

x=5, x=9 (ANS)

7 0
3 years ago
Superman can run so fast that he can runon water as well as land, and he never getstired. His average running speed is Mach 4, o
Elan Coil [88]

Answer:

It will take Superman 32.71 hours or 32 hours and 43 minutes

Step-by-step explanation:

Convert kilometers to meters

40,075 kilometers = 40,075,000 meters

\frac{340.29meters}{1 second} = \frac{40,075,000 meters}{x seconds} Cross multiply

340.29x = 40,075,000

x = 117,767.19 seconds

Convert seconds to hours

\frac{3600 seconds}{1 hour} = \frac{117,767.19 seconds}{x hours} Cross multiply again

3600x = 117767.19

x = 32.71 hours or 32 hours and 43 minutes

If this answer is correct, please make me Brainliest!

7 0
3 years ago
A 5-ounce can of tuna costs $0.90.A 12-ounce can of tuna cotst 2.40. which is the better buy
Julli [10]
0.90/5 = 18 cents per ounce

2.40/12 = 20 cents per ounce

The 12 ounce can because you get more for only two cents more
3 0
3 years ago
Q6.4☆ Points: 2 Suppose that Angela wants to use her sample to create a 68% confidence interval for the true population median o
Andrei [34K]

Answer:

She needs a sample size of 25.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.68}{2} = 0.16

Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

That is z with a pvalue of 1 - 0.16 = 0.84, so Z = 0.995.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

The population SD is 2 grams.

This means that \sigma = 2

What is the minimum sample size she needs to create a confidence interval that has a width of 0.4 grams?

She needs a sample size of n.

n is found when M = 0.4. So

M = z\frac{\sigma}{\sqrt{n}}

0.4 = 0.995\frac{2}{\sqrt{n}}

\sqrt{n} = \frac{0.995*2}{0.4}

(\sqrt{n})^2 = (\frac{0.995*2}{0.4})^2

n = 24.8

Rounding up:

She needs a sample size of 25.

7 0
2 years ago
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