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zheka24 [161]
3 years ago
7

Rhianna has 12 assignments left to complete for online learning this week. 5 of them are for statistics, 4 of them are for earth

& space science, and the rest of them are for economics.
What is the probability none of her next three assignments will be for statistics
Mathematics
1 answer:
katovenus [111]3 years ago
8 0

Answer:

1/22

Step-by-step explanation:

let me know if i got this wrong, but the events are dependent, so the equation   is (5/12)(4/11)(3/10)= 1/22.

Since there are 5 statistic and 12 total, that's obviously the first fraction. Then you take one from each because both sides are getting smaller (less statistic assignments and less total assignments.)

I did just learn this, but let me know if I was wrong please.

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Vilka [71]

its 3

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3 years ago
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PLEASE HELP worth 45 points
sdas [7]

1 blue square on drawing is length 1/4 in but that means 4ft in reality.

so one blue square area correspongs to 4x4 = 16 square feet.

(a) there 6 tiles for the batrhroom = 6x16 sq.ft = 96 sq.ft and the cost will be $480

(b) bedroom + living area = 7x8-8 tiles = 48 tiles = 48 x 16 sq.ft. = 768 sq.ft = 85.33 sq. yards. So the cost will be 85.33*18=$1535.94

(c) unit cost for tile: $5/sq.ft

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The tile has a greater unit cost ($5 per sq.ft) than carpet ($2 per sq.ft)


5 0
3 years ago
Find an equation of the line that is parallel to the graph of 2x+3y=5 and contains the point (3, −1).
uranmaximum [27]

Answer:

A) Equation of line is 3X - 2Y = 11

B) Equation of line is Y = X + 1  

C) Equation of line is Y - 7 = 0

Equation of line , point (3 , -1) and slop \frac{3}{2} is 3X - 2Y = 11

Step-by-step explanation:

Given equation of line as  2x + 3y = 5

slove of this line (m1) = - \frac{2}{3}

Now another line passes through point  (3 , -1) having slop (m2)

Both lines are parallel to each other, i.e (m1) × (m2) = - 1

So slop of second line (m2 ) = \frac{-1}{m1}

                                      (m2) = \frac{-1}{(\frac{-2}{3} } )

                                      (m2) = \frac{3}{2}

Now eq of line with point (3 , -1) and slop (m2)

Y- y1 = (m2)( X - x1)

Or, Y +1 = \frac{3}{2} (X - 3)

i.e 2Y + 2= 3X - 9

∴ Equation of line is 3X - 2Y = 11     Answer

B) Given points as ( 5,6) and (3 , 4)

Slop (m) = \frac{y2 - y1}{x2 - x1} = \frac{4 - 6}{3 - 5} = 1

So the equation of line is

Y- y1 = (m)( X - x1)

Y - 6 = (1) (X - 5)

i.e Equation of line is Y = X + 1   Answer

C) Given points as ( 0, 7)  , (0 , -8)

Slop (m) with co-ordianate =  \frac{y2 - y1}{x2 - x1}

Or,                                        =  \frac{-8 - 7}{0 - 0}

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7 0
3 years ago
Am I correct? I don’t think I am, please explain how i can get the right answer if I got it wrong, thank you!
S_A_V [24]

Answer:

that's wrong, its 217 1/2 miles

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Answer:

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