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makkiz [27]
3 years ago
12

A PLAY HAS PARTS FOR 12 BOYS AND 3 GIRLS. THERE ARE 5 LEAD ROLES FOR BOYS. ONE STUDENT IS INTERVIEWED FOR THE SCHOOL NEWSPAPER.

WHAT IS THE PROBABILITY THAT THE PERSON INTERVIEWED IS A BOY WHO IS CAST IN A LEAD ROLE
Mathematics
1 answer:
Black_prince [1.1K]3 years ago
5 0

Answer:

33% chance

Step-by-step explanation:

12+3=15

There are 5 lead roles meaning that you do 5/15=.33 or 1/3

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find an equation for the perpendicular bisector of the line segment whose endpoints are (-8,-5) and (-4,1)
lbvjy [14]

Answer:

y = -x - 8

Step-by-step explanation:

Midpoint of the line:

x = (x1 + x2)/2 = (-8 + -4)/2 = -12/2 = -6

y = (y1 + y2)/2 = (-5 + 1)/2 = -4/2 = -2

so midpoint is (-6,-2)

Slope of the line: Slope m = (y2-y1)/(x2-x1)

m = (-1 - -5)/(-4 - -8) = (-1 + 5)/(-4 + 8) = 4/4 = 1

Perpendicular lines have slopes that are negative reciprocals of one another

so slope of the perpendicular line is -1/1 is -1

y = mx + b

y = -x + b

Using (-6,-2)

-2 = -(-6) + b

-2 = 6 + b

b = -8

so y = -x - 8

6 0
2 years ago
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karita has $138.72 in her checking account she wrote checks for $45.23 and $18 then she made a deposit of $75.85 into her accoun
il63 [147K]

Answer:

She should have about $150

Step-by-step explanation:

If you round all the numbers you get..

140-50-20+80

140-50-20=70

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3 years ago
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A = {a, b, c, d}
Helen [10]

Answer:

Johnny is wrong.

A \cup B = \left\{a,b,c,d,e,f,g,h\right\}

Step-by-step explanation:

Johnny is wrong.

A better definition would be: A \cup B is the set of all elements that belong to at least one A or B.

So, the elements that belong to both A and B, like c and d in this exercise, also belong to A \cup B.

So:

A \cup B=\left\{a,b,c,d,e,f,g,h\right\}

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2 years ago
Don't know need help [pls
NeX [460]

Answer:

56

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2 years ago
1. Find the volume of a cone with a height of 4.8 m and a diameter of 8.4 m.
andrey2020 [161]

Answer:

no

Step-by-step explanation:

ok

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