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kozerog [31]
3 years ago
15

Help fast !!!!!!!!!!! factorise fully :4xy + 16x^2

Mathematics
1 answer:
ahrayia [7]3 years ago
5 0
Factor out the largest common factor of both terms. In this case, it's 4x.

Factor a 4x out by dividing each term by 4x.

Your answer is 4x(y+4x)
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A wheel spines at a rate of 41 revolutions per minute. how many revolutions per hour does it spin
ch4aika [34]
This is simple math, you know 60 minutes in 1 hour, so do 60 x 41 = 2,460


So it spins 2,460 times per hour.


Hope this helps!
8 0
3 years ago
If math students typically earn 24 points out of 35 possible on a test, how many points would be typical if there were 100 possi
Lilit [14]

Answer:

68.6

Step-by-step explanation:

Given the initial ratio of 24 points out of 35 possible points, you can set up a proportion (equivalent ratios) to find the expected number of points math students would ear on a test of 100 possible points:

\frac{earned}{possible}=\frac{24}{35}=\frac{x}{100}

Where 'x' is the number of points earned on the 100 point test.

Cross-multiply: 35x = 24(100) or 35x = 2400

Divide both sides by 35: 35x/35 = 2400/35

Solve for x:  x = 68.6

5 0
3 years ago
Are points B, J, and C collinear or noncollinear?
adoni [48]
I’m pretty sure they’re collinear. I’m so sorry if I’m wrong.
4 0
3 years ago
Does anyone one know how to make a factor a decimal on the calculator
Sedbober [7]

Answer: Yes, you have to hit the factor to decimal button F<>D

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
A coffee company wants to make sure that their coffee is being served at the right temperature. If it is too hot, the customers
Cerrena [4.2K]

Answer:

Null hypothesis:\mu = 65  

Alternative hypothesis:\mu \neq 65

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

For this case the value of \mu represent the parameter associated to the population (True average of cofee temperature)

Step-by-step explanation:

Data given and notation  

\bar X=70.2 represent the mean height for the sample  

s represent the sample standard deviation for the sample  

n=20 sample size  

\mu_o =765 represent the value that we want to test

\alpha represent the significance level for the hypothesis test.  

t would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the true mean i equal to 70.2, the system of hypothesis would be:  

Null hypothesis:\mu = 65  

Alternative hypothesis:\mu \neq 65  

If we analyze the size for the sample is < 30 and we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:  

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

For this case the value of \mu represent the parameter associated to the population (True average of cofee temperature)

3 0
3 years ago
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