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## Different ______ of an element have different numbers of electrons.1.ions2.isotopes3.compounds4.atoms

Explanation: Ions of an element are formed when an atom lose or gain electrons and thus different ions will have different electrons.

For example with 10 electrons is formed when Na with 11 electrons loses one electron. with 12 electrons is formed when Na with 11 electrons gains one electron.

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## The graph represents function 1 and the equation represents function 2: A graph with numbers 0 to 4 on the x-axis and y-axis at increments of 1. A horizontal straight line is drawn joining the ordered pairs 0, 3 and 4, 3. Function 2 y = 6x + 1 How much more is the rate of change of function 2 than the rate of change of function 1? A. 5 B. 6 C. 7 D. 8

The graph represents function 1 and the equation represents function 2: A graph with numbers 0 to 4 on the x-axis and y-axis at increments of 1. A horizontal straight line is drawn joining the ordered pairs 0, 3 and 4, 3. Function 2 y = 6x + 1 How much more is the rate of change of function 2 than the rate of change of function 1? A. 5 B. 6 C. 7 D. 8

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## The sum of two numbers is 42 . The smaller number is 10 less than the larger number. What are the numbers?

The sum of two numbers is 42 . The smaller number is 10 less than the larger number. What are the numbers?

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## A proportion is an equation that states two _____ are equal. 1. Variables 2. Ratios 3. Expressions 4. Numbers

A proportion is an equation that states two _____ are equal. 1. Variables 2. Ratios 3. Expressions 4. Numbers

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## At the city museum, child admission is \$6.40 and adult admission is \$9.60. On Tuesday, 160 tickets were sold for a total sales of \$1305.60. How many adult tickets were sold that day? numbers of adult tickets

X = children

6.40x + 9.60y = 1305.60

x + y =160

x=160-y

6.40(160-y) + 9.60y = 1305.60

1024 + 6.40y +9.60y = 1305.60

1024 = 3.2y = 1305.60

3.2y = 281.6

Y = 281.6/3.2 = 88

So 88

Double check now

X = 160-y

X=160-88 = 72

6.40 x 72 = 460.80

9.60 x 88 = 844.80

844.80 + 460.80 = 1305.60 this checks

88 + 72 = 160 this checks

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## Samples of size n = 90 are randomly selected from the population of numbers (0 through 9) produced by a random-number generator, and the variance is found for each sample. What is the distribution of the sample variances?

chi square distribution with df = n-1

Step-by-step explanation:

Given that sample of size n=90  are randomly selected from the population of numbers (0 through 9) produced by a random-number generator

Since sample size is large and randomness is followed we can assume that the variable follows a normal distribution.

Hence the sample variance would follow a chi square distribution with degree of freedom =

This is because we have is standard normal hence square will be a chisquare variate.  When we sum n variates we get chi square distribution with df n-1

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## Let f(x)=5/x and g(x) =2x^2+5x. What two numbers are not in the domain of F o G?

F(x)=5/x
g(x)=2(x^2)+5x
f(x) has a domain of all real numbers excluding zero
g(x) has a domain of all real numbers
fog(x)=5/(2(x^2)+5x)
fog(x)=5/(x(2x+5))
fog(x) has a domain that excludes both zero and -5/2

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## The sum of three consecutive natural numbers is 528, find the numbers.

The sum of three consecutive natural numbers is 528, find the numbers.

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## Two groups of students were asked how many hours they spent reading each day. The table below shows the numbers for each group: Group A 1 2 1 1 3 3 2 2 3 Group B 3 2 3 2 2 2 1 1 2 Based on the table, which of the following is true? The interquartile range for Group A students is 0.5 less than the interquartile range for Group B students. The interquartile range for Group A students is equal to the interquartile range for Group B students. The interquartile range for Group A employees is 0.5 more than to the interquartile range for Group B students. The interquartile range for Group A employees is 1 more than the interquartile range for Group B students.

Solution:

Data represented as number of hours spent in studying by Group A Students:

1,2,1,1,3,3,2,2,3

Arranging it in ascending order: 1,1,1 ,2, 2, 2, 3, 3, 3,

As number of terms is odd, The median will be middle value of observation.Which is 2.

The Data arranged in ascending order are , (1,1,1,2),2(2,3,3,3).

Median of (1,1,1,2) = =1

Median of (2,3,3,3)==3

=Interquartile Range ==3-1=2

For Data Set 2,

The Data for group B students are:  3   2 3 2 2 2 1 1 2

Arranging in ascending order: 1,1,2,2,2,2,2,3,3

total number of observation = 9

Median = 2

Arranging the data as : (1,1,2,2) 2,(2,2,3,3)

Median of (1,1,2,2)= Number of observation is 4 which is even , so Median= =

Median of (2,2,3,3)=

S=Interquartile Range = =

Interquartile range for Group A Students =Interquartile range for Group B students + 1

Option (D) The interquartile range for Group A employees is 1 more than the interquartile range for Group B students is true.

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## Rewrite 35 +63 as two factors. One factor is the GCF and the other is the sum of two numbers that do not have a common factor

To find this answer you would need to first find the GCF, which would be 7. Next, you would take both numbers (35 and 63) and divide them by 7, getting 5 and 9, and adding them together you would get 14. So your answer would be 7 and 14, since when you multiply those numbers, you get 98, which is the sum of 35 and 63.

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## What is the range of the function f(x) = – 1/3 |x − 1| − 2? all real numbers all real numbers less than or equal to −2 all real numbers less than or equal to 1 all real numbers greater than or equal to −2

What is the range of the function f(x) = – 1/3 |x − 1| − 2? all real numbers all real numbers less than or equal to −2 all real numbers less than or equal to 1 all real numbers greater than or equal to −2

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## What are other questions similar to?: If f(x) = x^2 – 9 / x^2 – 4, the domain of x is all real numbers except A) -2 and 2 B) -3 and 3 C) 0 D) 2 E) 2 and 3. (The answer for this question is A)

What are other questions similar to?: If f(x) = x^2 – 9 / x^2 – 4, the domain of x is all real numbers except A) -2 and 2 B) -3 and 3 C) 0 D) 2 E) 2 and 3. (The answer for this question is A)

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## The sum of two numbers is 52. The difference is 38. What are the two numbers?

The sum of two numbers is 52. The difference is 38. What are the two numbers?

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## List the set of all even numbers between 2 and 10, inclusive.

List the set of all even numbers between 2 and 10, inclusive.

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## S(n) is function that squares numbers. It can be written in equation form as S(n)=n^2. What is the value of S(13)?

S(n) is function that squares numbers. It can be written in equation form as S(n)=n^2. What is the value of S(13)?

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## Select the true statement about the series, ¾ + 7/8 + 11/12 + 15/16… A) The Series Given is n/n+1, where n is the natural number B)The series is divergent C)The series is n+4/s +4 times the sequence, where S and N are natural numbers D)The series is Convergent

Select the true statement about the series, ¾ + 7/8 + 11/12 + 15/16… A) The Series Given is n/n+1, where n is the natural number B)The series is divergent C)The series is n+4/s +4 times the sequence, where S and N are natural numbers D)The series is Convergent

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## Given int variables k and total that have already been declared, use a for loop to compute the sum of the squares of the first 50 counting numbers, and store this value in total. thus your code should put 1*1 + 2*2 + 3*3 +… + 49*49 + 50*50 into total. use no variables other than k and total.

Given int variables k and total that have already been declared, use a for loop to compute the sum of the squares of the first 50 counting numbers, and store this value in total. thus your code should put 1*1 + 2*2 + 3*3 +… + 49*49 + 50*50 into total. use no variables other than k and total.

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## Prove that for all natural numbers n 8n-3n is divisible by 5

Prove that for all natural numbers n 8n-3n is divisible by 5

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## Find a linear approximation of the function f(x)=sqrt[3]{1+x} at a=0, and use it to approximate the numbers sqrt[3]{.96} and sqrt[3]{1.02}

5 in 0.05 is 10 times greater than 5 in 0.005.

Step-by-step explanation:

To find : In which number does the digit 5 have greater value 0.05 or 0.005 how many times as great is it and how do you know ?

Solution :

According to the place value stem,

Ones      Tenths      Hundredths     Thousandths

0              0                   5                                           – 0.05

0              0                   0                        5                 – 0.005

In 0.05 5 is in hundredths place and in 0.005 5 is in thousandths place.

So, 5 in 0.05 is 10 times greater than 5 in 0.005.

As

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## Write the ratio as a ratio of whole numbers using fractional notation. Write the fraction in simplest form. 8 to 30

Write the ratio as a ratio of whole numbers using fractional notation. Write the fraction in simplest form. 8 to 30

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## Gino is buying wood screws at the corner hardware store. The table shows different numbers of bags of screws and their corresponding prices. Bags of Screws Price (\$) 2 10 4 20 7 35 According to the table, the relationship between the number of bags and the price is .

Gino is buying wood screws at the corner hardware store. The table shows different numbers of bags of screws and their corresponding prices. Bags of Screws Price (\$) 2 10 4 20 7 35 According to the table, the relationship between the number of bags and the price is .

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## The sum of two numbers is 44 . Their difference is 22 .

The sum of two numbers is 44 . Their difference is 22 .

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## The ratio of two numbers is 5/6. the second number is 16 less than twice the first number. find both numbers

Number of copy machines must be made to minimize the unit cost=160.

Step-by-step explanation:

We are given that the unit cost function C ( the cost in dollars to make each copy machine)

Then the unit cost function is given by

We have to find the number of copy machines for  minimize the unit  cost

Differentiate with respect to x

Then we get

……(equation I)

To find the value of x then we susbtitute is equal to zero

By using division property of equality

Again differentiate the equation I with respect to x then we get

Hence, the unit cost is minimize for x=160

Therefore, the number of copy machines must be made to minimize the unit cost =160

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## What is the domain of the functionf(x)=x+1/x^2-6x+8 ? all real numbers all real numbers except –1 all real numbers except –4 and –2 all real numbers except 2 and 4

What is the domain of the functionf(x)=x+1/x^2-6x+8 ? all real numbers all real numbers except –1 all real numbers except –4 and –2 all real numbers except 2 and 4