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3 years ago

Determine whether each question below is a statistical question. Write "yes" or "no" in the spaces provided.

Mathematics

1 answer:

nikdorinn [45]3 years ago

7 0

Answer:

a yes

b no

c no

d yes

e yes

f no

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The median rainfall during a spring storm in the lowlands is about 4 mm less than a spring storm in the highlands. The mean rain

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Median is just the value that is neither the highest nor the lowest compared with the other values in the set

Mean is just the average of the numbers which is found out by adding up all the numbers then dividing the sum by the number of values in the set

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Which of the following is the correct expansion of (3x-y)2

Studentka2010 [4]

$\bold{[ \ Answer \ ]}$

$\boxed{\bold{9x^{2} \ - \ 6xy \ + y^{2} }}$

$\bold{[ \ Explanation \ ]}$

$\bold{Find \ Expansion: \ (3x \ - \ y^{2} )}$

$\bold{----------------------}$

$\bold{[Apply \ Perfect \ Square \ Formula\ (\left(a-b\right)^2=a^2-2ab+b^2)] \ a \ = \ 3x, \ b \ = \ y}$

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3 years ago

Students were surveyed about their wither break plans.Of the people that stated they were going skiing, 25% did not actually go.

Romashka [77]

Answer:

The number of students who actually went for the skiing is 0.75 times the total number of students .

Step-by-step explanation:

Given as :

Students were surveyed about their wither break plans

The percentage of students who did not go for skiing = 25 %

So, The percentage of students who did not go for skiing =100 % - 25 % = 75%

Let The total number of students = x

So, The number of students actually went for the skiing = 75% of the total number of students

I.e The number of students actually went for the skiing = $\frac{75}{100}$ × x

Or, The number of students actually went for the skiing = 0.75× x

∴ The number of students actually went for the skiing = 0.75 x

Hence The number of students who actually went for the skiing is 0.75 times the total number of students . Answer

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4 years ago

5 a + 3 b + 2 a b + 4 a -7 b

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Answer:

5a+4a=9a

3b-7b=-4b

2ab

=9a-4b+2ab or 2ab+9a-4a

Step-by-step explanation:

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Answer: I think the answer is C, but I'm not 100% sure

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