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2 years ago

If you answer this question CORRECTLY, you will get a free $25 Dollar Amazon Gift Card. (Also will be given brainliest)

Mathematics

1 answer:

PSYCHO15rus [73]2 years ago

8 0

Answer:

Step-by-step explanation:

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find the size of each sample needed to estimate the difference between the proportions of boys and girls under 10 years old who

Alex Ar [27]

Answer:

sample

Step-by-step explanation:

6 0

2 years ago

Last questions, plz help

Goryan [66]

Answer:

9. $a_n=7+6n$

10. $a_n=a_{n-1}+7$

Step-by-step explanation:

9. Given the sequence

$13, 19, 25, ...$

In this sequence,

$a_1=13\\ \\a_2=19\\ \\a_3=25\\ \\...$

Note that

$a_2-a_1=19-13=6\\ \\a_3-a_2=25-19=6,$

then the common difference in this sequence is $d=6$

You have

$a_1=13\\ \\d=6,$

then the explicit formula is

$a_n=a_1+(n-1)d\\ \\a_n=13+(n-1)\cdot 6\\ \\a_n=13+6n-6\\ \\a_n=7+6n$

10. Given the sequence

$-10,-3, 4, 11, ...$

In this sequence,

$a_1=-10\\ \\a_2=-3\\ \\a_3=4\\ \\a_4=11\\ \\...$

Note that

$a_2-a_1=-10-(-3)=-10+3=-7\\ \\a_3-a_2=-3-4=-7\\ \\a_4-a_3=11-4=7,$

then the common difference in this sequence is $d=7$

You have

$a_1=-10\\ \\d=7,$

then the recursive formula is

$a_n=a_{n-1}+d\\ \\a_n=a_{n-1}+7$

5 0

2 years ago

Which expression represents the phrase “13 less than the current amount”? A. 13 – n B. n + 13 C. n – 13 D. n look at the picture

cricket20 [7]

The answer is C I believe. I wasn't sure what exactly D was saying, but I am pretty sure the answer is C

7 0

2 years ago

Read 2 more answers

Please help me with B

QveST [7]

She is incorrect because 27 is not a prime number but yet it has 7 at the end

8 0

2 years ago

If 4 more than 4 times a certain number is the same as 4 more than the product of 3 and 4, what is that number?

gtnhenbr [62]

Answer: the number is 3

Step-by-step explanation:

Let the number be represented by x.

If 4 more than 4 times a certain number is the same as 4 more than the product of 3 and 4, it means that

4x + 4 = 4 + 3×4

4x + 4 = 4 + 12

4x + 4 = 16

Subtracting 4 from the left hand side and the right hand side of the equation, it becomes

4x + 4 - 4 = 16 - 4

4x = 12

Dividing the left hand side and the right hand side of the equation by 4, it becomes

x = 12/4 = 3

5 0

2 years ago