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Scilla [17]
3 years ago
10

In Ms.Perron's class, 75% of the students are boys.There are 18 boys in the class. What is the total students in Ms.Perron's cla

ss?
Mathematics
2 answers:
kifflom [539]3 years ago
7 0

Answer:

Step-by-step explanation:

Let x be the total students.

75% of x = 18

(75/100) * x = 18

               x = 18 * 100 / 75  

                  = 18 * 4 / 3  ( giving by 25th table)

                   = 6 * 4  ( giving by 3rd table)

x = 24 students

Thepotemich [5.8K]3 years ago
6 0

Answer:

24.

Step-by-step explanation:

75: 3/4

18 / 3 = 6

6 x 4 = 24

0.75 x 24 = 18

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Find the coordinates of the other endpoint of the​ segment, given its midpoint and one endpoint.​ (Hint: Let​ (x,y) be the unkno
makkiz [27]

Step-by-step explanation:

Hey, there!!

Here, one point is A(10,8) and P(8,5) is the midpoint.

Let B(x,y) be the another end point.

Now,

Using midpoint formulae,

p(x.y) =  \frac{x1 + x2}{2} . \frac{y1 + y2}{2}

p(8.5) = ( \frac{10 + x}{2} . \frac{8 + y}{2} )

Since they are equal,equating with their corresponding elements we get,

8 =  \frac{10 + x}{2}

or, 16 = 10 + x

or, x=16-10

Therefore, x = 6

Now,

5 =  \frac{8 + y}{2}

or, 10 = 8 + y

or, y = 2

Therefore, The coordinates of another point are B(6,2)

<em><u>Hope it helps</u></em><em><u> </u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>

8 0
4 years ago
P(A)=7/20,P(B)=3/5,P(A∩B)=21/100 ,P(A∪B)=?
satela [25.4K]

Answer:

P( A U B) = 37/50

Step-by-step explanation:

7/20+3/5+21/100

IF YOU NEED MORE HELP LMK

7 0
3 years ago
Read 2 more answers
Question 1 of 10
Jet001 [13]
The answer should be true
4 0
3 years ago
Read 2 more answers
How can I use the percent equation???Ex.what number is 40% of 500???and can u solve this one,too.:45 is 25% of what number???THA
HACTEHA [7]
I've been waiting for someone to ask this question.  It's one of my favorite questions to answer.

percent means out of 100 so 1% = 1/100 and 40%=40/100 or 1/25
so for percent of a number, 'of' means multiply so 40% of 500= 40/100 times 500 or 20000/100 or 200



if you multiply a fraction by its recipricol (the number fliped upside down) the you will get 1 so if you multiply 1/2 by 2/1 then you will get 1

thus
percent is out of 100 so 1%=1/100  25%=25/100
if you represent 45 out of something as 45/x then you multiply it by the reciprocal of the fraction that is supposed to be equal (1/2 =2/4) then you will get 1
so 45/x times reciprocal of 100/25 then you will get 1/1 or 4500/25x
so you divide to find x and get 180
so 45 is 25% of 180


The following is extra
   as stated above 'of' can be taken as multiply so
   45 is 25% of 180 can be rewriten as
   45=25/100 times 180
   but we don't know that 180 is the answer so we replace it with x then            solve for x
4 0
3 years ago
Read 2 more answers
How do I solve for a​
qwelly [4]

Answer:

using the pythagoras theorem the answer is a=3

Step-by-step explanation:

basically in a right angled triangle a² + b² equals c². in this equation c is the number on the hypotenuse (the line opposite the right angle)

and 4 could be a or b it doesnt make a difference so I'll call it b.

because we have c² and b² we work backwards like this:

{5}^{2}  -  {4}^{2}  =  {a}^{2}

{5}^{2}  -  {4}^{2}  = 25 - 16 = 9

because 9 is a², we must find the square root to find <em>a</em>

\sqrt{9 }  = 3

so a equals 3

3 0
3 years ago
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