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In-s [12.5K]
3 years ago
8

Suppose there are 8 boys and 7 girls in a classroom. If one student is chosen at random to run a errand. What is the probability

that the student will be a girl?
Mathematics
1 answer:
Mariulka [41]3 years ago
5 0

Answer:

7/15

Step-by-step explanation:

7+8=15

there's 7 girls so you have 7/15 chance of getting a girl

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A recipe for sparkling water calls for 1 1/2 quarts of sparkling water and 3/4 quarts of grape juice how much sparkling water wi
Mashutka [201]

Answer: 18 quarts

Step-by-step explanation:

Quantity of sparkling water and gape juice are used in proportion in  the recipe.

Let x=  quantity of sparkling water when 9 quarts of grape juice is used.

Then,

\dfrac{x}{9}=\dfrac{1\dfrac12}{\dfrac34}\\\\\Rightarrow\ =\dfrac{x}{9}=\dfrac{\dfrac32}{\dfrac34}\\\\\Rightarrow\ \dfrac{x}{9}=\dfrac{4}{2}\\\\\Rightarrow\ x= 2\times9\\\\\Rightarrow\ x=18

Hence, 18 quarts of sparkling water is required to mix with 9 quarts of grape juice.

7 0
3 years ago
15a+65b&lt;150 <br><br> Please help
son4ous [18]

Answer:a<−13/3

b+10

Step-by-step explanation:

Step 1: Add -65b to both sides.

15a+65b+−65b<150+−65b

15a<−65b+150

Step 2: Divide both sides by 15.

15a

15

<

−65b+150

15

a<

−13

3

b+10

Answer:

a<

−13

3

b+10

8 0
3 years ago
Is this in scientific notation? Thank you!
kari74 [83]
No because the number has to be between 1 and 10 so it should be 2.6x10^3
5 0
3 years ago
2x - 2y = 12<br> 29. - 3y = -2
Sophie [7]

Olá boa tarde meu nome é "Guilherme" sou de Brasil e vou resolver a sua pergunta

a ) 2x - 2y = 12

{ a 2

{ b 2

{ c 12

<u>/</u><u>\</u> = b elevado 2 -4 a.c

<u>/</u><u>\</u> = (2) elevado 2 -4 . 24

<u>/</u><u>\</u> = 4 -4 . 24

<u>/</u><u>\</u> = 24

X = <u>-</u><u>b</u><u>+</u><u>/</u><u> </u><u>/</u><u>\</u><u> </u> = <u> </u><u>2</u><u> </u><u>-</u><u> </u><u>5</u>

2a 2

<u> </u><u>5</u>

2

<u> </u><u>5</u>

2

S = {20,10}

b) 29. - 3y = -2

{ a = 29

{ b = -3

{ c = -2

<u>/</u><u>\</u> = b elevado 2 -4 a.c

<u>/</u><u>\</u> = (-6) -4 . 58

<u>/</u><u>\</u> = -10 . 58

<u>/</u><u>\</u> = -48

X = <u> </u><u>b</u><u> </u><u>+</u><u> </u><u>/</u><u> </u><u>/</u><u>\</u><u> </u> = <u> </u><u>-</u><u>3</u><u> </u><u>+</u><u> </u><u>24</u><u> </u>

<u> </u><u>5</u>

3

<u> </u><u>5</u>

3

S = { 15,15}

Espero ter ajudado

2a 2

3 0
3 years ago
A movie rental website charges $5.00 per month for membership and $1.25 per movie.
Doss [256]

Answer:

she could be rounding the cents up

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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