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3 years ago

Today stephy makes 40 dolls, and she

Mathematics

2 answers:

Eddi Din [679]3 years ago

7 0

Answer:

44 dolls

Step-by-step explanation:

Finger [1]3 years ago

6 0

Answer:

Yesterday, Stephy made 36 dolls.

Step-by-step explanation:

1% of 40 is 0.4 so... 10% is 4

Then we can do 40-4 to get 36.

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Hasil dari 64^5/6 + 27^2/3 - 81^3/4 adalah<br>tolong bantuannya kakak kakak<br>

NeTakaya

Answer:

Step-by-step explanation:

Given the indicinal expression 64^5/6 + 27^2/3 - 81^3/4

According to indices;

$a^{m/n} = (\sqrt[n]{a}) ^m$

Applying this to the question

$64^{5/6} \\= (\sqrt[6]{64}) ^5\\= 2^5= 32$

Similarly

$27^{2/3}\\= (\sqrt[3]{27}) ^2\\= 3^2\\= 9\\$

Also;

$81^{3/4}\\= (\sqrt[4]{81}) ^3\\= 3^3\\= 27$

Substitute inti the original equation

64^5/6 + 27^2/3 - 81^3/4

= 32 + 9- 27

= 41 - 27

= 14

Hence the required answer is 14

6 0

3 years ago

A bag contains 7 red marbles, 2 blue marbles and 3 green marbles. If two marbles are drawn out of the bag, what is the exact pro

son4ous [18]

Answer:

Therefore the probability of getting both blue marbles is $\frac{1}{66}$ .

Step-by-step explanation:

Probability : The ratio of favorable outcomes to the total outcomes.

Given that a bag contains 7 marbles which are red in color, 2 marbles which are blue in color and 3 marbles which are green in color.

Total number of marbles = (7+2+3) = 12

The probability of getting a blue on first drawn is

$=\frac{\textrm{No. of blue marbles}}{\textrm{Total number marbles}}$

$=\frac{2}{12}$

$=\frac16$

Now the number of blue marbles = (2-1)= 1 [ since 1 blue marbles is drawn]

Total number of marbles = (12-1) =11

The probability of getting a blue marble on second drawn is

$=\frac{\textrm{No. of blue ball}}{\textrm{Total number ball}}$

$=\frac{1}{11}$

Therefore the probability of getting both blue marbles is

$=(\frac1 6 \times \frac1 {11})$

$=\frac{1}{66}$

4 0

4 years ago

What is the value of x in the equation 8x - 2y = 48, when y = 4?

spin [16.1K]

8x-2(4)=48 Then, 8x-8=48 Then, 8x=56 Then X=7

The value of x in the equation is 7.

5 0

4 years ago

Read 2 more answers

The sum of two numbers is 68. Their difference is 15. Write a system of equations you could use to solve this problem.

SashulF [63]

Answer:

x+y=68

x-y=15

Step-by-step explanation:

A "sum" means that we will be using addition, while a "difference" indicates subtraction. Anytime we have two unknown numbers we generally use "x" and "y".

8 0

3 years ago

A rancher is going to fence three sides of a corral next to a river. He needs to maximize the corral area using 240 feet of fenc

professor190 [17]

Answer:

A. 60 feet B. 7200 ft²

Step-by-step explanation:

A. Find the length of the corral along the river that will give the maximum area

To find the length of the corral that will give the maximum area, we differentiate A with respect to x and equate it to zero.

So, dA(x)/dx = d[x(240 - 2x)]/dx

= (240 - 2x)dx/dx + xd(240 -2x)/dx

= 240 - 2x -2x

= 240 - 4x

So, dA(x)/dx = 0

240 - 4x = 0

4x = 240

x = 240/4

x = 60 feet

B. Find the maximum area of the corral

The maximum area at x = 60 feet is

A(x)=x(240−2x)

A(60)=60(240−2(60))

A(60) = 60(240 - 120)

A(60) = 60(120)

A(60) = 7200 ft²

4 0

3 years ago