MATHEMATICS HIGH SCHOOL

Five times the sum of a number eleven divided by three times the sum of the number eight

Answers

Answer 1
Answer:

The expression for the given phrase is 5x+11/3x+8.

The given phrase is five times the sum of a number eleven divided by three times the sum of the number eight.

What is an expression?

An expression is a combination of terms that are combined by using mathematical operations such as subtraction, addition, multiplication, and division.

Let the unknown number be x.

Five times the sum of a number eleven = 5x+11

Three times the sum of the number eight = 3x+8

So, the expression is 5x+11/3x+8

Therefore, the expression for the given phrase is 5x+11/3x+8.

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Answer 2
Answer: 5(x+11)/3(x+8)

The sum of the variable (x) or in other words, the unknown number, is being added with 11 for a sum. The entirety of that is being multiplied by 5. Now, that entire product (answer to multiplication) is being divided by the sum of that same variable (x) and 8 multiplied by 3.

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In the past ten years, the population of a city decreased from 90,000 to 75,000 Find the percent decrease.

Answers

The answer is 31.5%.

Please answer correctly !!!! Will mark brainliest !!!!!!!!!!!!

Answers

Answer:

7-x

Step-by-step explanation:

49 - x^2 is a perfect square so

it factors to :(7+x)(7-x)

since there is a negative in 49 - x^2, it would make sense that the answer would be a negative to get that negative answer in the first place (negative times a positive equals a negative)

Forgive me for my lame explanation :')

It takes 1/8 tsp of baking soda to make 4 dozen cookies.How many teaspoons of baking soda does it take to make 1 dozen cookies?

Answers

Given:
1/8 tsp of baking soda to make 4 dozen cookies.

teaspoons of baking soda needed to make 1 dozen cookies.

1/8 tsps ÷ 4 dozen = 1/8 * 1/4 = 1*1 / 8*4 = 1/32 tsps

It takes 1/32 teaspoons of baking soda to make 1 dozen cookies.

Calculate the marked price of a sweater purchased at Rs. 1075 allowing 14% discount. ( please do proper answer )​

Answers

Answer:

  • Rs. 1250

Step-by-step explanation:

Let the marked price be x, then we have:

  • x - 14%  = 1075
  • x*(100 - 14)/100 = 1075
  • x*0.86= 1075
  • x = 1075/0.86
  • x = 1250

Marked price was Rs. 1250

There are 46 students in an elementary statistics class. On the basis of years of experience, the instructor knows that the time needed to grade a randomly chosen first examination paper is a random variable with an expected value of 5 min and a standard deviation of 4 min. (Round your answers to four decimal places.)(a) If grading times are independent and the instructor begins grading at 6:50 P.M. and grades continuously, what is the (approximate) probability that he is through grading before the 11:00 P.M. TV news begins?(b) If the sports report begins at 11:10, what is the probability that he misses part of the report if he waits until grading is done before turning on the TV?

Answers

Answer:

a) P ( T < 250 mins ) = 0.7695

b) P ( T > 260 mins ) = 0.1344

Step-by-step explanation:

- The RV from a sample has the following parameters that are mean = 5 mins, and standard deviation s = 4 mins.

- The entire population has n = 46 students.

- We will first compute the population mean u and population standard deviation σ as follows:

                            u = n*mean

                            u = 46*5 = 230 mins

                            σ = sqt ( n ) * s

                            σ = sqt ( 46 ) * 4

                            σ = 27.129 mins

- Approximating that the time taken T to grade the population of entire class follows a normal distribution with parameters u and σ as follows:

                            T~ N ( 230 , 27.129 )

Find:

- If grading times are independent and the instructor begins grading at 6:50 P.M. and grades continuously, what is the (approximate) probability that he is through grading before the 11:00 P.M. TV news begins?

- The total time till 6:50 PM to 11:00 PM is ( 4 hr and 10 mins ) = 250 mins.

- We will compute the Z-value as follows:

                        Z = ( 250 - 230 ) / 27.129

                        Z = 0.7372

- Then use the Z-Tables and determine the probability:

                        P ( T < 250 mins ) = P ( Z < 0.7372 )

                        P ( T < 250 mins ) = 0.7695

Find:

-  If the sports report begins at 11:10, what is the probability that he misses part of the report if he waits until grading is done before turning on the TV?

- For the teacher to miss the sports report he must take more time than 6:50 PM to 11:10 P.M.

- The total time till 6:50 PM to 11:10 PM is ( 4 hr and 20 mins ) = 260 mins.

- We will compute the Z-value as follows:

                        Z = ( 260 - 230 ) / 27.129

                        Z = 1.10582

- Then use the Z-Tables and determine the probability:

                        P ( T > 260 mins ) = P ( Z > 1.10582 )

                        P ( T > 260 mins ) = 0.1344

Algebra question What is the solution to the following system?


(3, 1, 0)
(0, 1, 0)
(2, 1, 0)
(–2, 1, 0)

Answers

The solution to the following system is (2,1,0).

What is Algebra?

Algebra is defined as the study of mathematical symbols and in which letters and symbols are used to represent numbers.

We have,

3x+3y+6z=9    (i)

x+3y+2z=5    (ii)

3x+12y+12z=18  (iii)

To find the solution to the above give algebraic equations,

We have to find values of x,y,z.

So,

We will be putting z=0 in equation (i),

3x+3y+6(0)=9

3x+3y=9    (iv)

Now,

We will be putting z=0 in equation (ii),

x+3y+2(0)=5

x+3y=5  

x=5-3y    (v)

Using equation (iv) & (v),

We get,

3(5-3y) +3y=9

15-9y+3y=9

-6y=-6

y=1,

Now we have value of  y=1, putting this value in equation  (v),

x=5-3(1)

x=2,

Hence, we can say that option (2,1,0) is the correct answer.

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Answer:

C.(2,1,0)

Step-by-step explanation:

on edg
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