A group consisted of 2 girls for every boy. 24 more girls joined in the class. There are now 5 girls for every boy. How many are in the class?

Answers

Answer 1

Answer: $in\ the\ class\ are\ n\ boys\ \ \ \Rightarrow\ \ 2n+24=5n\ \ \Rightarrow\ \ 3n=24\ \ \Rightarrow\ \ n=8\n\nn=8\ \ \Rightarrow\ \ 5n=5\cdot 8=40\ (girls)\n\n40+8=48\n\nAns.\ in\ the\ class\ are\ 48\ students.$

Answer 2

Answer: Situation 1:

$(g)/(b)=2\rightarrow g=2b$

Situation 2:

$(g+24)/(b)=5\n \n g+24=5b$

Replacing g in the second equation:

$2b+24=5b\n \n 3b=24\n \n b=8\n \n g=2b\n \n g=16$

In the Situation 1 there was 16 girls and 8 boys = 24 persons
In the Situation 2 there are 40 girs + 8 boys = 48 persons

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eight students are painting 2 boards for a project . the students want to divide the work equally. how much of the board should each student paint?

Answers

Each student should do 1/4 of one board or 1/8 of both boards. This is because 8÷2 is 4, which means 4 people need to work together on one board.

each student paint about 4 inches or less

Sales for a business were 3 million dollars more the second year than the first, and sales for the third year were double the sales for the second year. If sales for the third year were 38 million dollars, what were sales, in millions of dollars, for the first year?A. 16
B. 17.5
C. 20.5
D. 22
E. 35

Answers

The sales in million of dollar, for the first year is 16 million in dollars.

What are sales ?

"In general business operations, sales refer to any transactions where money or value is exchanged for the ownership of a good or entitlement to a service."

Given,

The sales for the third year is 38 million dollars.

Let the sales for the first year be x

and the sales for the second year be y

So, x+3 = y;

Sales for the third year = $\ 2(x+3)$

$\38 = 2(y)38 = 2(x+3)$

i.e. x = 16

Hence, option A is correct.

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a:16
38/2=19
Then minus 3

Help me please jem boy wants to make his 8-meter square pool into a rectangular one by increasing its length by 2m and decreasing its width by 2m .jem boy asked your expertise to help him decide on certain matters.
a.What will be the new dimensions of jem boy's pool?
b.What will be the new are of Jem Boy's pool? What special product will be used?
c.If the sides of the square pool is unknown,how will you represent its area?
d. I fJem Boy does not want the area of his pool to decrease, will he pursue his plan? Explain your answer.

Answers

into a rectangular one by increasing it's length by 2m and decreasing it's width by 2m.

How can you figure someone age for exampleEvelyn was 9 when her brother Victor was born. Which equation tells you how to find Evelyn's age if you know Victor's age?

e=Evelyn's age
v=victor's age

A. e=v+9
B. v=e+9
C. e=v-9
D. e+v=9

Answers

Since e represents evelyn ege, hence the equation that tells you how to find Evelyn's age if you know Victor's age is e = v + 9

System of equations

These are equation containing unknown variables

If Evelyn was 9 when her brother Victor was born, hence;

Victors age = v

Evelyn age = v + 9

Substitute both equations

Since e represents evelyn ege, hence the equation that tells you how to find Evelyn's age if you know Victor's age is e = v + 9

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A. e=v+9 because if Victor is 6 then it would be 6+9= 15 (Evelyn's Age)

Kate made 4 dresses with 7 yards of fabric. how many yards did she use on 1 dress

Answers

This is a fraction equal to
7 yards ÷ 4 dresses

We want a unit rate where
1 is in the denominator,
so we divide top and bottom by 4.

7÷4= 1.75
_
4÷4=1.
Therefore, Kate used 1.75 yards per one dress (1.75 yds. p/ d)

Hope I helped! :)

Select the correct operator for the following exponential expression.explain me how to do this?

Answers

Answer:

obviously c

Step-by-step explanation:

9 is more than 8

Answer:

Step-by-step explanation:

4²⁰ ? 20⁴

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Jacob is solving the equation below using successive approximations.2^x-4=3^-x-2 He started from a graph where he found the solution to be between 1 and 2. Using the lower and upper bounds from the graph, Jacob did the following work for the first iteration. Step 1 Rewrite the equation so that it equals zero on one side. Step 2 Evaluate the rewritten equation at the lower and upper bounds. To find the solution that lies between 1 and 2, set these values as the lower and upper bounds while finding the solution. Step 3 Take the average of the lower and upper bounds. Step 4 Evaluate the rewritten equation at x = . Step 5 Since this value is positive, replace the previous lower bound so that the bounds are now x = and x = 2. Where did Jacob make a mistake, and what was the error?