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taurus [48]
3 years ago
12

A bag contains 4 red, 3 green and 2 blue marbles. What is the probability of selecting a green marble and then a blue marble ass

uming you replace the first marble?
Mathematics
1 answer:
TiliK225 [7]3 years ago
5 0

1st of all, this makes my brain hurt

2nd of all, which one was the first marble?

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Solve for substitution<br> x-2y+z=-11<br> 3x+2y-z=7<br> -x+2y+4z=-9
Alla [95]

Answer:

Unit rate miles per day is, 3

Step-by-step explanation:

Unit rate are defined as the rate are expressed as quantity of 1 such that 2 miles per hour or 5 km per hour.

As per the given statement: A construction crew built 1/2 miles of road in 1/6 days

by unit rate definition;

After substituting the given values we have

⇒  

or

Therefore, unit rate miles per day is, 3

Step-by-step explanation:

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6 0
3 years ago
Twin​ brothers, person a and person​ b, can mow their​ grandparent's lawn together in 18 minutes. person a could mow the lawn by
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3 years ago
the height of the snow was 84 inches in the beginning of the week. it melts at a rate of 0.15 inches per hour. how many hours wo
lakkis [162]

Answer:

It takes 147 hours for the snow to reach 62 inches.

Step-by-step explanation:

Given:

Height of the snow at the beginning  = 84 inches

Rate at which the snow melts = f 0.15 inches per hour

To Find:

The time taken for the  snow to reach 62 inches = ?

Solution:

Let the time taken to reach 62 inches be x

Then according to the question,

Total height of the snow - (rate of melting)(x) = 62 inches

On substituting the values,

84 - (0.15)(x) = 62

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- 0.15x = 62 - 84

- 0.15x = -22

0.15x = 22

x = \frac{22}{0.15}

x= 146.6

x = 147

7 0
3 years ago
Write the expression in correct forma<br><br>13n² -6n⁴ + 2n -5n³ + 3<br>​
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-6n^4 -5n^3 +13n^2 +2n +3

organize the exponents from higher to lower.

4 0
3 years ago
A hairstylist schedules 1/4 hour to trim a customers hair and 1/6 hour to style the customers hair. the hairstylist plans to wor
Lana71 [14]
To make it simple make them all the same fraction

6/24 to trim 4/24 to style and she wants to work for 80/24 hours for 5 days

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she wants to do 80/24 so she can do 8 appointments a day if each take 10/24

8 appointments a day 5 days a week

8x5= 40 
3 0
3 years ago
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