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podryga [215]
2 years ago
10

Out of 28 students in a class, 7 have blue eyes. What is the probability a student picked at

Mathematics
2 answers:
mars1129 [50]2 years ago
7 0

Answer:

3/4

Step-by-step explanation:

7/28 have blue eyes

So 28-7=21

21/28 don't have blue eyes

21/28 simplified=3/4

nadya68 [22]2 years ago
4 0

The answer would be 3/5.

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Will mark brainliest, 60 points
il63 [147K]

Answer:

21 C

22 B

23 169

Step-by-step explanation:

21 3m mean 3 times a certain number

22 the negative make the 4 go negative and the -5 positive

23 i did 5^2-4^2= 9

then 6^2 divided by 9+9= 13 i took the 9 from the 5^2 problem then divided it by 6^2

then 13 x 13 = 169

8 0
2 years ago
Subtract 19/12 - 3/4
AfilCa [17]
<h2>◇Answer : </h2>

\rm \frac{19}{12}  -  \frac{3}{4}  =  \frac{9}{12}  -  \frac{9}{12}  =  \frac{9 - 9}{12}  =  \frac{0}{12} =  \bf0 \:  \: (done.)

4 0
2 years ago
Read 2 more answers
What is the solution to this system of equations? y = x - 20 x + y = 84
Pepsi [2]

Answer:

(52, 32 )

Step-by-step explanation:

Given the 2 equations

y = x - 20 → (1)

x + y = 84 → (2)

Substitute y = x - 20 into (2)

x + x - 20 = 84, that is

2x - 20 = 84 ( add 20 to both sides )

2x = 104 ( divide both sides by 2 )

x = 52

Substitute x = 52 into (1) for corresponding value of y

y = 52 - 20 = 32

Solution is (52, 32 )

3 0
3 years ago
Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.
murzikaleks [220]

Answer: 9 hours

Step-by-step explanation:

10+6= 16-5=11+3=9 hours

3 0
3 years ago
These figures are similar. The area of one is given. Find the area of the other.
lilavasa [31]

Answer:

100 in^2

Step-by-step explanation:

(15/21)^2 x 196 = 100

7 0
3 years ago
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