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3 years ago

For Points !

Mathematics

2 answers:

svlad2 [7]3 years ago

7 0

For each of these patterns, a certain number is added each time.

9, _, 27, _, _, 54.

For this one, The first term and the third term have a difference of 18. In order to find the second term, we must divide this number by 2.

18/2 = 9

We find that it is increasing 9 each term.

9, 18, 27, 36, 45, 54.

3, 6, 9, _, _, _.

From the first term to the second, the difference is 3, which is the same as the second to third.

Therefore we find that it is adding 3 each time.

3, 6, 9, 12, 15, 18.

0, 22, _, _.

From the first term to the second, it is adding 22.

Therefore the pattern should look like:

0, 22, 44, 66.

Doss [256]3 years ago

6 0

9,18,27,36,45,45 3,6,9,12,15,18 0,22,44,66

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dimaraw [331]

Yesssss you got it right boy

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3 years ago

Find the value of r so the line that passes through (-5,2) and (3,r) has a slope of -1/2

soldier1979 [14.2K]

The value of r so the line that passes through (-5,2) and (3,r) has a slope of -1/2 is -2

Solution:

Given that line is passing through point (-5, 2) and (3, r)

Slope of the line is $\frac{-1}{2}$

Need to determine value of r.

Slope of a line passing through point $\left(x_{1}, y_{1}\right) \text { and }\left(x_{2}, y_{2}\right)$ is given by following formula:

$\text { Slope } m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$ --- eqn 1

$\text { In our case } x_{1}=-5, y_{1}=2, x_{2}=3, y_{2}=\mathrm{r} \text { and } m=-\frac{1}{2}$

On substituting the given value in (1) we get

$\begin{array}{l}{-\frac{1}{2}=\frac{r-2}{3-(-5)}} \\\\ {\text { Solving the above expression to get value of } r} \\\\ {=>-\frac{1}{2}=\frac{r-2}{3+5}} \\\\ {=>-8=\frac{r-2}{3+5}} \\\\ {=>-8=2(r-2)} \\\\ {=>-8=2 r-4} \\\\ {=>2 r=-8+4} \\\\ {=>2 r=-4} \\\\ {=>r=\frac{-4}{2}=-2}\end{array}$

Hence the value of "r" is -2

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4 years ago

[6] Jessica sold one third of her records and then bought 84 more. She now has 178 records. How many records did Jessica begin w

tia_tia [17]

Answer:

141 records

Step-by-step explanation:

Let the initial number be x

Sold 1/3x, and now has:

x - 1/3x = 2/3x

Bought 84 more and now got 178:

2/3x + 84 = 178
2/3x = 94
x = 94 ÷ 2/3
x = 94 × 3/2
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Jessica had 141 records initially

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3 years ago

twelve and three tenths more than five and thirteen thousandths of a number d is equal to fifteen and three hundred two thousand

AVprozaik [17]

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5.013d = 15.302 - 12.3
5.013d = 3.002
d = 3.002 / 5.013
d = 0.599 (thats rounded) <==

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3 years ago

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sergey [27]

The answer is -420 (negative four-hundred and twenty)

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4 years ago