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Amiraneli [1.4K]
4 years ago
14

A carton contains 20 shirts , of which q are made of pure cotton. After 4 more pure cotton shirts are added to the carton, the p

robability of drawing a pure cotton shirt becomes 3/4 , find the value of q.
Mathematics
1 answer:
MaRussiya [10]4 years ago
7 0

Answer:

listen when in doubt go with choice 3.

Step-by-step explanation:

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Two intersecting lines l and m form an angle of 56° with each other. The reflection of a point (–4, 1) along the line l followed
Tasya [4]

Answer:

  B)  112°

Step-by-step explanation:

After the double reflection the point is effectively rotated by an amount that is double the angle between the lines of reflection:

  2·56° = 112°

_____

In the attached, lines l and m are separated by 56°, as required by the problem statement.

7 0
3 years ago
Let u and v be the solutions to 3x^2 + 5x + 7 = 0. Find u/v+v/u
Hitman42 [59]

Answer:   \dfrac{-17}{21}

Step-by-step explanation:

Given: u and v be are the solutions of  3x^2+5x+7=0

Let  ax^2+bx+c=0 is the quadratic equation and u and v are the zeroes/solutions then

Sum of zeroes;   u+v = \dfrac{-b}{a}

Product of zeroes; uv= \dfrac{c}{a}

Comparing  3x^2+5x+7=0  to  ax^2+bx+c=0

we get a= 3 , b= 5 and c = 7

u+v = \dfrac{-b}{a} = \dfrac{-5}{3}----(i)

uv= \dfrac{c}{a} = \dfrac{7}{3}----(ii)

Now we have to find

\dfrac{u}{v} +\dfrac{v}{u} =\dfrac{u^2+v^2}{uv} adding and subtracting 2uv in numerator we get

= \dfrac{u^2+v^2+2uv-2uv}{uv}= \dfrac{(u+v)^2-2uv}{uv}

Substituting the values from (i) and (ii) we get

\dfrac{(\dfrac{-5}{3} )^2-2\times \dfrac{7}{3} }{\dfrac{7}{3} } = \dfrac{\dfrac{25}{9} -\dfrac{14}{3} }{\dfrac{7}{3} }= \dfrac{\dfrac{25-42}{9} }{\dfrac{7}{3}} =\dfrac{-17}{9} \times \dfrac{3}{7} = \dfrac{-17}{21}

Hence, the value of \dfrac{u}{v} +\dfrac{v}{u}   is  \dfrac{-17}{21}

5 0
4 years ago
Given the graph below, find MN. Round to the nearest hundredth.
Galina-37 [17]

Answer:

5.39

Step-by-step explanation:

if you are trying to find MN then it means you need to find the length.

we cant use slope, but we CAN make it a triangle!

*see the attached image*

we can use A^2+B^2 to get what the hypotenuse is or C^2 is

2^2+5^2

4+25=29

the square root of 29 is 5.385

then we just round to the hundreth!

5.39

(8>5, so we bump him up)

hope this helped!

7 0
3 years ago
The points represented by the table lie on a line. Find the slope of the line.<br> helpppppp
natulia [17]

Answer:

yes it is very slopey..and.. steep

6 0
3 years ago
You tell your mom that you want ₹700₹700₹, 700 as pocket money every month. She can deposit some money in the bank such that the
Colt1911 [192]
Let me think? I’m not sure
6 0
4 years ago
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