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olasank [31]
3 years ago
10

One book costs £2.99 how much do six books cost

Mathematics
2 answers:
Advocard [28]3 years ago
7 0
£13.98 I think !!!!!
Evgen [1.6K]3 years ago
4 0
One book costs £2.99 6 books cost £18.00
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6)
svetoff [14.1K]
It would be option A, -413
5 0
3 years ago
We want to have a survey and ask people working for IT companies if they prefer Skype to mobile phones for making calls. We want
weqwewe [10]

Answer:

For this case we want to test if in IT companies more than 20% of employees prefer to use Skype rather than a mobile phone (alternative hypothesis) and the complement would be the the null hypothesis. So then the system of hypothesis are:

Null hypothesis: p =0.2

Alternative hypothesis: p >0.2

And for this case we should use a righ tail test based on the alternative hypothesis.

Step-by-step explanation:

Previous concepts

A hypothesis is defined as "a speculation or theory based on insufficient evidence that lends itself to further testing and experimentation. With further testing, a hypothesis can usually be proven true or false".  

The null hypothesis is defined as "a hypothesis that says there is no statistical significance between the two variables in the hypothesis. It is the hypothesis that the researcher is trying to disprove".  

The alternative hypothesis is "just the inverse, or opposite, of the null hypothesis. It is the hypothesis that researcher is trying to prove".  

Solution to the problem

For this case we want to test if in IT companies more than 20% of employees prefer to use Skype rather than a mobile phone (alternative hypothesis) and the complement would be the the null hypothesis. So then the system of hypothesis are:

Null hypothesis: p =0.2

Alternative hypothesis: p >0.2

And for this case we should use a righ tail test based on the alternative hypothesis.

6 0
3 years ago
HELLLLP (will mark brainiest)
Zigmanuir [339]

Answer:

We put the value of the x in the formula

{4 \times }(6)^{2}  - 7 \times 6 + 12

f(6)=

4 \times 36 - 7 \times 6 + 12 = 144 - 42 + 12 = 102 + 12 = 114

Step-by-step explanation:

Than solve equation.

6 0
3 years ago
Read 2 more answers
63% of 300 is what number ​
PolarNik [594]

Answer:

189

Step-by-step explanation:

You take 63% make it a decimal by dividing it by 100 and then you multiply it with 300. 300*.63=189.

6 0
3 years ago
Read 2 more answers
The root mean square velocity of one mole of a monoatomic gas having molar mass M is U rms . The relation between average kineti
garik1379 [7]

root means square velocity of one mole of a monoatomic gas having molar mas*s m(M) is Urms. The relation between average kinetic energy (e)of the gas and Urms is Urms=M2E

StarrySoul please check it...

8 0
2 years ago
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