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3 years ago

Can two distinct lines intersect in more than one point? Explain.

1 answer:

8 0

Yes. if for instance u had two lines that were both plotted vertically on the y axis then they would intersect everywhere that they were touching

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13 boxes of fish cost $49. How much would 3 boxes cost?

jeka57 [31]

Answer:

Step-by-step explanation:

Cost of 13 boxes of fish=$49

Cost of 1 box=$49/13=$3.769

Cost of 3 boxes=$3.769×3

=$11.307

7 0

3 years ago

A bag contains red marbles, white marbles, and blue marbles. Randomly choose two marbles, one at a time, and without replacement

dsp73

Answer:

$P(First\ White\ and\ Second\ Blue) = \frac{3}{28}$

$P(Same) = \frac{67}{210}$

Step-by-step explanation:

Given (Omitted from the question)

$Red = 7$

$White = 9$

$Blue = 5$

Solving (a): $P(First\ White\ and\ Second\ Blue)$

This is calculated using:

$P(First\ White\ and\ Second\ Blue) = P(White) * P(Blue)$

$P(First\ White\ and\ Second\ Blue) = \frac{n(White)}{Total} * \frac{n(Blue)}{Total - 1}$

<em>We used Total - 1 because it is a probability without replacement</em>

So, we have:

$P(First\ White\ and\ Second\ Blue) = \frac{9}{21} * \frac{5}{21 - 1}$

$P(First\ White\ and\ Second\ Blue) = \frac{9}{21} * \frac{5}{20}$

$P(First\ White\ and\ Second\ Blue) = \frac{9*5}{21*20}$

$P(First\ White\ and\ Second\ Blue) = \frac{45}{420}$

$P(First\ White\ and\ Second\ Blue) = \frac{3}{28}$

Solving (b) $P(Same)$

This is calculated as:

$P(Same) = P(First\ Blue\ and Second\ Blue)\$ $or\ P(First\ Red\ and Second\ Red)\ or\ P(First\ White\ and Second\ White)$

$P(Same) = (\frac{n(Blue)}{Total} * \frac{n(Blue)-1}{Total-1})+(\frac{n(Red)}{Total} * \frac{n(Red)-1}{Total-1})+(\frac{n(White)}{Total} * \frac{n(White)-1}{Total-1})$

$P(Same) = (\frac{5}{21} * \frac{4}{20})+(\frac{7}{21} * \frac{6}{20})+(\frac{9}{21} * \frac{8}{20})$

$P(Same) = \frac{20}{420}+\frac{42}{420} +\frac{72}{420}$

$P(Same) = \frac{20+42+72}{420}$

$P(Same) = \frac{134}{420}$

$P(Same) = \frac{67}{210}$

6 0

3 years ago

Super confused on this one! somebody help quickly!

Sergeeva-Olga [200]

The correct answer is A.

Exponents should be multiplied when the expression is in the form (x^a)^b. In this case, the result is always equal to x^(a*b).

For B and D, the exponents should be added since the base is the same. Exponents in C should be subtracted since they are divided and cancel each other out

3 0

3 years ago

Find the mean of the data 49, 62, 52, 54, 61, 70, 55, 53,

erastovalidia [21]

Answer:

Step-by-step explanation:

49+62+52+54+61+70+55+53/8 = 57

6 0

3 years ago

What is the product of (2x+3) and (2x-3)

AveGali [126]

Answer:

4x² - 9 is your answer dear.

Step-by-step explanation:

(2x+3) * (2x-3)

4x² - 6x + 6x - 9

4x² - 9

Hope you got it.

6 0

3 years ago