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Julli [10]
3 years ago
7

Alex surveyed his classmates to determine who has been surfing and who has gone snowboarding let a be the event that a classmate

has snowboard it and let be be the event that a classmate has served if alex picked a classmate at random what is p(b|a)
Mathematics
1 answer:
strojnjashka [21]3 years ago
8 0

Answer: 3/4

Step-by-step explanation: Given that B is the event occurring and A is the event that has happened, we will use 36/48 as our probability. Once simplifying the numbers, you will get .75 or 3/4.

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NEED HELP WILL MARK BRAINLIEST ANSWER
GREYUIT [131]
Your answer would be the first one because a reflection is when the object is facing itself 
The red corner should face itself 
Hope This Helps! :)

3 0
3 years ago
A store pays $24 for a jewelry box and marks the price up by 20%. What is the amount of
Ratling [72]

Answer:

$4.8

Step-by-step explanation:

$24×20/100=$4.8

7 0
3 years ago
9/20
Stella [2.4K]

<u>Question:</u>

Find the number of real number solutions for the equation. x^2 + 5x + 7 = 0

<u>Answer:</u>

The number of real solutions for the equation x^{2}+5 x+7=0 is zero

<u>Solution:</u>

For a Quadratic Equation of form : a x^{2}+b x+c=0  ---- eqn 1

The solution is x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}  

Now , the given Quadratic Equation is x^{2}+5 x+7=0  ---- eqn 2

On comparing Equation (1) and Equation(2), we get

a = 1 , b = 5 and c = 7

In x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a} , b^2 - 4ac is called the discriminant of the quadratic equation

Its value determines the nature of roots

Now, here are the rules with discriminants:

1) D > 0; there are 2 real solutions in the equation

2) D = 0; there is 1 real solution in the equation

3) D < 0; there are no real solutions in the equation

Now let solve for given equation

D= b^2 - 4ac\\\\D = 5^2 - 4(1)(7)\\\\D = 25 - 28 \\\\D = -3

Since -3 is less than 0, this means that there are 0 real solutions in this equation.

4 0
3 years ago
Find the two correct values of x in the equation 3x² = y when y = 75.​
valentina_108 [34]

Answer:

5 and -5

Step-by-step explanation:

3x² = 75

x² = 75/3

x² = √25

x = 5 and - 5

3 0
2 years ago
What is the surface area of the right rectangular prism with a square base, as
Jlenok [28]
342cm because the 4 sides equal 180cm and the top and base equal 162.
7 0
3 years ago
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