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3 years ago

Kristen has been earning $150 per week by babysitting. She has been working hard to save

Mathematics

2 answers:

Kazeer [188]3 years ago

7 0

Answer:

6 weeks

Step-by-step explanation:

If you divide $150 by .20%, you will get $30.

150/.2=30

That is how much she earns every week, but you want to $180 so you divide $180 by $30 to get 6 weeks.

180/30=6

Therefore, your answer is 6 weeks! :)

dolphi86 [110]3 years ago

5 0

Answer:

6 weeks

Step-by-step explanation:

Multiply 150 by 0.2 (20% in decimal form) to get how much she saves every week.

150×0.2=30

She saves 30 every week, but you want to get to 180.

Divide 180 by 30, and you get 6

180÷30=6

That means it takes her six weeks to save $180.

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Stolb23 [73]

Answer:

Step-by-step explanation:

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3 years ago

Write a rule for the nth term of the arithmetic sequence:<br><br> a11= 50, d = 7

ivolga24 [154]

Answer:

Required rule for $n^{th}$ is $a_{n}=7n-27$ .

Step-by-step explanation:

Given that,

$a_{11} = 50,\ \ d=7$

From the question: we have to write the $n^{th}$ term of Arithmetic sequence.

Arithmetic Sequence or Arithmetic progression (A.P) : It is a sequence which possess that difference between of two successive sequence is always constant.

$a_{1} ,a_{2},a_{3},a_{4}.....................a_{n-1},a_{n}$

where, $a_{1}$ is the first term of A.P

$d$ is the common difference.

$a_{n}$ is the last term or general term.

The above sequence to be in A.P then their common difference should be equal.

$d=a_{2}-a_{1} =a_{3}-a_{2}=a_{4} -a_{3} ..........................a_{n}-a_{n-1}$

Now, Formula of General Term is $a_{n}=a+(n-1)d$

So, $a_{11}= a+(11-1)d\\ a_{11} = a+10d$

Substituting the value of $a_{11} = 50,\ \ d=7$ we get,

$50=a+10\times7\\50=a+70\\a=-20$

Then General term ( $a_{n}$ ) of given data is

$a_{n}=-20+(n-1)7\\a_{n}=-20+7n-7\\a_{n}=7n-27$

Therefore, Required rule for $n^{th}$ is $a_{n}=7n-27$ .

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3 years ago

The test scores of students in a math class are 46, 40, 50, 43, 35, 41, 50, 42, 38, and 48. What is the mean of this set of data

zimovet [89]

Mean is the average. You would add up all the numbers and divide by how many numbers you have. 433/10=43.3

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3 years ago

What is the reciprocal of 1 8/9

notka56 [123]

Answer: 9/17
Reason

The reciprocal is simply flipping the denominator and numerator of a fraction.

1-8/9 as a mixed fraction is 17/9
So the reciprocal would be to flip it,
Giving you 9/17 which is in its simplest form

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2 years ago

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2 years ago