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Gnesinka [82]
3 years ago
10

Charlie's bag contains 4 blue pens and 3 red pens. He pulls out a pen at random, replaces it in the bag, and then pulls out a se

cond pen at random. If the first pen is blue, what is the probability that the second pen is red
Mathematics
1 answer:
pickupchik [31]3 years ago
5 0
50 50 because there is 3 blue pens and 3 red plans after the 4th blue one was taken out
Mark brainliest
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The teacher asks the students to record as many different patterns they can think of for her number rule. Identify what type of
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ellen had 25 hair clips,7 of them were blue and the rest are purple.what percent of hair clips were purple
strojnjashka [21]
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  18       x
____=____
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6 0
3 years ago
Read 2 more answers
If a wagon wheel has a diameter of 70cm, how many revolutions would it take to travel 66 METERS?
ddd [48]

Answer:

30 revolutions

Step-by-step explanation:

to calculate the revolution of the wheels in 66 metres we need to get the circumference

circumference = 2πr, r = radius (diameter divided by 2) but from the formula of circumference we ca rewrite it as πd= 3.14 x 70 = 219.8cm

next convert 66 metres to cm

100cm = 1m

x= 66m

cross multiply

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6 0
3 years ago
A rectangular soccer field is twice as long as it is wide. If the perimeter of a soccer field is 300 yards, what are the fields'
Masteriza [31]
<span>A rectangular soccer field is twice as long as it is wide. If the perimeter of the soccer field is 300 yards , what are its dimensions?
I know the basic formula is 2W+2L=300 but i am not sure where to go from there...
-----
Equations:
2W + 2L = 300
L = 2W
----
Substitute for "L" and solve for "W": 
</span><span>2W + 2(2W) = 300
6W = 300
W = 50 yds (width)
----
Solve for "L":
L = 2W
L = 100 yds (length)
========================
Cheers.
</span>
8 0
3 years ago
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