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3 years ago

10

There are 3 times as many girls in the class than boys. there is a total of 24 students in the class. how many girls are in the

class? what do you know?

1 answer:

inna [77]3 years ago

5 0

There are 18 girls in the class and 6 boys.

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Please help me I am confused

nadezda [96]

Answer: X= 11

Step-by-step explanation:

3 0

2 years ago

What is the image point of ( -5,0 ) after a translated left 2 units and down 3 units ?

kvv77 [185]

Answer: ( -7 , -3 )

Step by step:
The point: ( X , Y )
Left 2 units = change X by -2
So, -5 subtract by 2 equals -7
Down 3 units = change Y by -3
So, 0 subtract by 3 equals -3
Now, X = -7 and Y = -3, so the answer is ( -7 , -3 )

Hope this helps! Please tell me if I did anything wrong, thank you!

5 0

3 years ago

Sergio is working on a research project involving the ages of students at Brooklyn College. After interviewing 500 students, he

Zinaida [17]

Answer:

The probability of of a randomly chosen student being exactly 21 years old.

= 1.293

Step-by-step explanation:

<u><em>Step(i):-</em></u>

<em>Given Population size n = 500</em>

<em>Mean of the Population = 20 years and 6 months</em>

<em> = </em> $20 + \frac{6}{12} = 20 +0.5 = 20.5 years$ <em></em>

<em>Standard deviation of the Population = 2 years</em>

Let 'X' be the range of ages of the students on campus follows a normal distribution

Let x =21

$Z = \frac{x-mean}{S.D}$

$Z = \frac{x-mean}{S.D} = \frac{21-20.6}{2} =0.2$

<em>The probability of a randomly chosen student being exactly 21 years old.</em>

<em>P( Z≤21) = 0.5 + A( 0.2) </em>

= 0.5 +0.793

= 1.293

6 0

3 years ago

Please help , thank you so much !!

Shkiper50 [21]

Answer:

that is scientifically impossible

Step-by-step explanation:

one you can't add, subtract, round up, or use decimals write that down.

3 0

2 years ago

Select all quantities that are proportional to the diagonal length of a square.

horsena [70]

Answer:

B. Perimeter of a square and

C. Side length of a square

Step-by-step explanation:

if n= side length of square then

Area of square is $n^{2}$
Perimeter of a square is 4×n
diagonal length of a square is $\sqrt{2}$ × n

Thus,

Perimeter of square can be expressed as

$2\sqrt{2}$ ×diagonal length of a square

Side length of a square can be expressed as

$\frac{1}{\sqrt{2} }$ ×diagonal length of a square

but Area of square is

$\frac{1}{\sqrt{2} }$ ×n×diagonal length of a square

As a Result, Area of square is <em>also dependent of the value n</em>, wheras in other cases it is <em>a proportion of diagonal length of a square</em>

5 0

3 years ago