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Vlada [557]
3 years ago
15

A bag contains 12 red marbles, 5 yellow marbles, and 15 green marbles. How many additional red marbles must be added to the 32 m

arbles already in the bag so that the probability of randomly drawing a red marble is ? Select your answer. 13 18 28 32 40
Mathematics
1 answer:
kakasveta [241]3 years ago
5 0

Answer:

= 18 red marbles

Step-by-step explanation:

Let x be the number of red marbles that must be added

Therefore;

New number or red marbles = x+12

Total marbles will be x+32

Thus;

The probability of selecting a red marble = (x+12)/(x+32)

Therefore;

(x+12)/(x+32)=3/5

5(x+12)=3(x+32)

5x+60+3x+96

2x=36

x=18

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sasho [114]
Convert the timing into hours only:
11:15  = 11.25h
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To find the average, we need to find the middle of these timing:
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5 0
2 years ago
Please help solve please
irina1246 [14]
You just solved it.... do u need the work shown?
8 0
3 years ago
What is the perimeter in centimetres of a regular octagon with sides measuring 17 mm?
Anit [1.1K]

Answer:

1.36 centimeters

Step-by-step explanation:

Given,

side length ( a ) = 17 mm

To find : Perimeter of regular octagon ( in cm )

Octagon has 8 sides.

Perimeter of regular octagon

= 8 x a

= 8 x 17

= 136 mm

1 mm = 0.1 cm

136 mm

= 136 x 0.1

= 1.36 centimeters ( cm )

Hence,

Perimeter of regular octagon is 1.36 centimeters.

7 0
2 years ago
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Can someone help me do this I'm not good at this kind of math
Finger [1]

hope this helps i did this instead of my ap psych work haha

i didnt rlly check my answers so i hope this are correct <3

5 0
3 years ago
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