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Inga [223]
2 years ago
6

To get on the top players list , don needs to have a minimum average score of 225 after playing four games. His scores on his fi

rst three games were 192, 214, and 250.
What is the minimum score don needs to earn on his fourth game ?
Mathematics
2 answers:
Black_prince [1.1K]2 years ago
8 0
Average must be 225 or more
4 games so
\frac{score1+score2+score3+score4}{4}  \geq 225
score1=192
score2=214
score3=250
score4=?
so
\frac{192+214+250+?}{4}  \geq 225
\frac{656+?}{4}  \geq 225
times both sides by 4 to clear fraction
656+?≥900
minus 656 from both sides
?≥244

min score is 244
Andreyy892 years ago
5 0

Answer:

i took test its correct 244

Step-by-step explanation:

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Marizza181 [45]

Answer:

dont really know buy im thinking its A.

Step-by-step explanation:

hope this helps somewhat

7 0
2 years ago
A demographer wants to measure life expectancy in countries 1 and 2. Let μ1 and μ2 denote the mean life expectancy in countries
Art [367]

Answer:

For this case we want to test if life expectancy in country 1 is more than 10 years lower than in country 2, (alternatibe hypothesis), so then the system of hypothesis are:

Null hypothesis: \mu_1 \leq \mu_2 -10

Alternative hypothesis:\mu_1 > \mu_2 -10

Or equivalently:

Null hypothesis: \mu_1 - \mu_2 \leq 10

Alternative hypothesis:\mu_1 - \mu_2 >10

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 life expectancy in country 1 is more than 10 years lower than in country 2, (alternatibe hypothesis), so then the system of hypothesis are:

Null hypothesis: \mu_1 \leq \mu_2 -10

Alternative hypothesis:\mu_1 > \mu_2 -10

Or equivalently:

Null hypothesis: \mu_1 - \mu_2 \leq 10

Alternative hypothesis:\mu_1 - \mu_2 >10

7 0
2 years ago
What does 4×0.2=? equal 15 POINTS
zlopas [31]
<span>What does 4×0.2 = ?
</span>
The answer is 0.8
6 0
3 years ago
Read 2 more answers
Square T was translated by the rule (x + 2, y + 2) and then dilated from the origin by a scale factor of 3 to create square T″.
Delicious77 [7]

Answer: OPTION C.

Step-by-step explanation:

It is important to know the following:

<u> Dilation:</u>

  • Transformation in which the image has the same shape as the pre-image, but the size changes.
  • Dilation preserves betweenness of points.
  •  Angle measures do not change.

<u>Translation:</u>

  • Transformation in which the image is the same size and shape as the pre-image.
  • Translation preserves betweenness of points.
  • Angle measures do not change.

Therefore, since the Square T was translated and then dilated to create Square T'', we can conclude that the statement that explains why  they are similar is:

<em>Translations and dilations preserve betweenness of points; therefore, the corresponding sides of squares T and T″ are proportional.</em>

6 0
3 years ago
Read 2 more answers
Melinda wants to reduce her expenses so she can balance her budget. Which variable expense can Melinda easily adjust?
sattari [20]
B. Because you can easily just eat at home and avoid paying to eat

7 0
3 years ago
Read 2 more answers
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