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Sindrei [870]
2 years ago
9

In a class of 20 students, 9 are female and 15 have an A in the class. There are 2 students who are male and do not have an A in

the class. What is the probability that a student has an A given that the student is female?
Mathematics
1 answer:
MrRissso [65]2 years ago
4 0

Answer:

1/20

there are 20 students altogether

Step-by-step explanation:

um I'm not sure

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You have 6 liters that has 20% of strawberry juice. How many liters of an 80% strawberry juice should be added to the mixture to
Nataliya [291]

Answer:

127.2 litres

Step-by-step explanation:

Let x be the number of 80% strawberry juice( in litres ) mixed with 6 litre of 20% strawberry juice mixture to obtain 55%  strawberry juice,

∵ Resultant mixture = (6+x) litres,

Since, strawberry in x litres + strawberry in 6 litres = strawberry in resultant mixture

⇒ 80% of x + 20% of 6 = 55% of (60+x)

⇒ 80x + 20 × 6 = 55(60+x)

⇒ 80x + 120 = 55 × 60 + 55x

⇒ 80x = 3300 + 55x - 120

⇒ 80x - 55x = 3180

⇒ 25x = 3180

⇒ x = \frac{3300}{25} = 127.2

Hence, 127.2 litres of 80% mixture should be mixed.

7 0
3 years ago
Write an equation for each line.
Effectus [21]

Answer:

y = -x+2

Step-by-step explanation:

We know the y intercept is 2  ( where it crosses the y axis)

We know two points on the line

(0,2) and (2,0), so we can find the slope

m = ( y2-y1)/(x2-x1_

   = (0-2)/(2-0)

   = -2/2

  = -1

The slope intercept form of the line is

y = mx+b where m is the slope and b is the y intercept

y = -1x +2

y = -x+2

3 0
3 years ago
Explain how to draw a circle with a circumference of 3.14^2 inches. then draw the circle.
ch4aika [34]

This is what I would do.

The general formula for the circumference of a circle is

2\pi \: r

where r is the length of the radius of the circle. Simply use the formula to find r so that you can draw the circle:

2\pi \: r = 3.14 ^{2} inches \\ r =  \frac{3.142 ^{2} }{2\pi}   = 1.571  \: inches

Now, draw a circle with a radius of 1.571 inches. This number has been rounded up to 3 significant figure. Hope this helps!

4 0
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

<u>Sold 1/3x, and now has:</u>

  • x - 1/3x = 2/3x

<u>Bought 84 more and now got 178:</u>

  • 2/3x + 84 = 178
  • 2/3x = 94
  • x = 94 ÷ 2/3
  • x = 94 × 3/2
  • x = 141

Jessica had 141 records initially

7 0
3 years ago
Solve by factorisation<br> 10r^2 - 23r + 9 = 0<br><br> Please answer fast
Ede4ka [16]

Answer:

9/5 or 1/2

Step-by-step explanation:

Check attachment

I hope this was helpful, Please mark as brainliest

3 0
4 years ago
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