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Pachacha [2.7K]
3 years ago
8

Benali's has a bag filled with marbles. There are 7 blue marbles and 1 green marble. she reaches into the bag and pulls out a ma

rble. she keeps this marble out of the bag. Then she reaches in again and pull out another marble. What is the probability that she selected a blue marble first and a blue marble second?
Mathematics
1 answer:
vesna_86 [32]3 years ago
7 0
7/8 and 6/7........................i think
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Please help with 6 and 7
Maru [420]

Answer:

6a) i- 2hrs 36mins  ii- 3hrs 12mins

b) car A≈ 76.9km/h  car B≈ 62.5km/h

c)------

7a) 35km

b) car A=75km  car B=60km

c) 30km

d) car A≈36mins  car B≈48mins

Step-by-step explanation:

6a) Using the graph follow the lines until they finish then go downwards until you get to the x-axis. The x-axis is going up by 12mins for each square.

b) Using the answer from a, you divide 200km by the time.

For car A 2hrs 36mins becomes 2.6 because 36mins/60mins=0.6

∴ car A: 200/2.6≈ 76.92km/h

For car B 3hrs 12mins becomes 3.2 because 12mins/60mins=0.2

∴ car B: 200/3.2≈ 62.5km/h

7a) Using the graph go down from where the line of car A finished to meet car B. The y-axis is going up by 5km for each square.

b) Starting from the x-axis at 1 hour go upwards to see where you meet the car B line (60km) and car A line(75km). (sorry if that does not really make sense).

c) Difference from car A line to car B:

155km-125km=30km

d) Going across from 50km meet car A line and go down to see it has been travelling for approx. 36mins. Then continue across to car B line, go down to see it reached 50km at approx. 48mins.

Hope this helps.

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3 years ago
Solve each equation &amp; show<br> 3) 36 = 1+ 7a
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Answer:

a=5

The drawing will help

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3 years ago
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