Consider the statement,
Irrational numbers are closed under subtraction
Is the statement true or false? If false, justify with a counterexample
false; The numbers 2 and 7 are irrational, but V2 - cannot be simplified to an irrational number.
true
false; The number 2 is irrational, but 2 - 2 = 0 and is not irrational
false; The numbers 10 and 6 are irrational, but
/10
V6 14 2 and 2 is not irrational

Answer:

An Irrational number is a number that cannot be expressed as the ratio of two integers.

Example: [tex]\pi[/tex]

its numbers are infinite

Answer:

0.66

Step-by-step explanation:

Rosalia passed out fliers that say, “Vote for Rosalia!” She gave out 85 fliers on Monday, 66 fliers on Tuesday, and 99 fliers on Wednesday.

Total fliers shared= 85+66+99

Total fliers shared= 250 fliers

Fraction of the fliers she gave out on Wednesday= fliers on Wednesday/total fliers

=99/150

= 33/50

= 3.3/5

= 0.66

Answer:

0.66

Step-by-step explanation:

Answer:

Integer

Step-by-step explanation:

On every number line we have both negative and positive numbers. So negative 15 is an integer

Answer: (2, -1)

Explanation: Since one equation has a -5y and the other equation

has a +5y, when we add the equations together, the y's will cancel out.

So we have 5x = 10 and x = 2.

To find y, plug 2 back in for x in either of the two original equations.

I have chosen to plug 2 into the second equation to get (2) + 5y = -3.

Solving from here, y = -1.

So our final answer is the ordered pair (2, -1).

Now, check your answer.

Answer:

The teacher woll award the student 96 points for studying for 4 hours

Step-by-step explanation:

The student receives 72 point for preparing a test as long as 3 hours.

If she prepares for another test for 4 hours.

3 hours= 72 points

4 hours=( 72*4)/3

4 hours=72/3 *4

4 hours = 24*4

4 hours= 96 points

The teacher woll award the student 96 points for studying for 4 hours

Answer:

12. 5x

13. 5/x-z

Step-by-step explanation:

12. product means multiplication so multiply 5 by x= 5x

13. quotient means division and difference means subtraction. so you divide 5 by x-z= 5/x-z

Answers:

[tex]\huge \boxed{{12. \ 5x}}[/tex]

[tex]\huge \boxed{{13. \ \frac{5}{x-z} }}[/tex]

[tex]\rule[225]{225}{2}[/tex]

Step-by-step explanation:

The product is the result after multiplying values together.

The product of 5 and x is:

[tex]5 * x[/tex]

[tex]5x[/tex]

The quotient is the result after dividing values together.

The difference is the result after subtracting values together.

The quotient of 5 and the difference of x and z is:

[tex]\displaystyle \frac{5}{x-z}[/tex]

[tex]\rule[225]{225}{2}[/tex]

Answer:

The new balance on his card is $-449.57

Step-by-step explanation:

He starts by owing $474.43 which is -474.43

First, he returns $48.90 and $45.38 which means that we are going to add 48.9 and 45.38 to -474.43

, he returns $48.90 and $45.38 which means that we are going to add 48.9 and 45.38 to -474.43-474.43 + 48.9 + 45.38 = -380.15

, he returns $48.90 and $45.38 which means that we are going to add 48.9 and 45.38 to -474.43-474.43 + 48.9 + 45.38 = -380.15Now he owes the bank $380.15

Next, he purchased 2 more items for $38.39 and $31.03 which indicates -380.15 - 38.39 - 31.03.

-380.15 - 38.39 - 31.03 = -449.57

Therefore he owes the bank $449.57 now

Hope this helped ~

Your local smart crackhead

Answer:

If 12 granola bars are nine dollars,

(12/9)

We divide the amount by the price!

Twelve divided by nine is about $1.33.

The image is rounded to the nearest thousandth

Answer:

3840 minutes

Step-by-step explanation:

60x64= 3840

can i have the brainliest, please????

Answer:3840 minutes

Step-by-step explanation:

there is 60 min in an 1 hr so there for you can multiple 64x60 which equals 3840

Answer:

16.28 mph ; 79.38°

Step-by-step explanation:

Given the following :

Speed of child due east = 3mph

Speed of ship due North = 16mph

Relative speed of th child is obtained by using Pythagoras rule to find the hypotenus

Relative Speed = Sqrt(3² + 16²)

Relative Speed = sqrt(9 + 256)

= sqrt(265)

= 16.2788 mph

= 16.28 mph

From trigonometry ;

Tanθ = opposite / Adjacent

Tanθ = (16 / 3)

Tanθ = 5.333

θ = tan^-1(5.333)

θ = 79.379°

θ = 79.38°

Answer:

deciding that the claim is true

Suppose you want to equate an expression to zero:

[tex]\[\begin{array}{l}20 - 10y - 7y + 9 = 0\\29 - 17y = 0\\17y = 29\\y = \frac{{29}}{{17}}\end{array}\][/tex]

Answer:

c

Step-by-step explanation:

Answer:

a

[tex]N = 222[/tex]

b

[tex]0.36< p <0.44[/tex]

c

No we  can not safely conclude that majority of students enjoy statistics because the upper limit of the confidence level is less than 50%

Step-by-step explanation:

From the question we are told that

   The  sample size is  [tex]n = 555[/tex]

   The  percentage that enjoyed statistics is [tex]\r p = 40% = 0.40[/tex]

Generally the number of student who say they enjoyed statistics is mathematically represented as

        [tex]N = 0.40 * 55[/tex]

=>     [tex]N = 222[/tex]

Given that the confidence  level  is  95%  then the  level of significance is mathematically represented as

        [tex]\alpha = ( 100-95)\%[/tex]

=>    [tex]\alpha = 0.05[/tex]

The critical value  of  [tex]\frac{\alpha }{2}[/tex] obtained from the normal distribution table  is  [tex]Z_{\frac{\alpha }{2} } = 1.96[/tex]

 The  margin of error is mathematically represented as

             [tex]E = Z_{\frac{\alpha }{2} } * \sqrt{\frac{ \r p (1 - \r p )}{n} }[/tex]

=>          [tex]E = 1.96 * \sqrt{ \frac{0.40 (1- 0.40 )}{ 555} }[/tex]

=>.       [tex]E = 0.04[/tex]

The 95% confidence interval is mathematically represented as

            [tex]\r p - E < p < \r p + E[/tex]

=>        [tex]0.40 - 0.04 < p <0.40 + 0.04[/tex]

=>         [tex]0.36< p <0.44[/tex]

No we  can not safely conclude that majority of students enjoy statistics because the upper limit of the confidence level is less than 50%

Answer:

Answer:

B

Step-by-step explanation:

First to find the sample mean

Xbar= summation x/n= 40/4= 10

The sample standard deviation is:

S= √summation(x-xbar)²/ n-1

=√6/3= 1.4142

The degrees of freedom

df= N-1= 4-1= 3

For 95% confidence level, critical value of t

t= 3.182

The 95% confidence interval is:

=Xbar plus or minus t' *8/√n

= 10 plus or minus 3.182(1.4142/√4)

= 10plus or minus 2.25

So 7.75 or 12.25

Answer:

20

Step-by-step explanation:

From the above question, we were given the following information:

Number of Guests = Frequency

100 – 119 = 45

120 – 139 = 76

140 – 159 = 56

160 – 179 = 17

180 – 199 = 27

Class width can be defined as :

The difference between the upper limits of two consecutive classes, or the difference between the lower limits of two consecutive classes.

The class width for this GFDT : 139 - 119

= 20

Answer:

Step-by-step explanation:

Answer:

9

Step-by-step explanation:

Because 63 is a multiple of 7

So.... 63/7

=9

So this shows us 9 is the mean

HOPE IT HELPS YOU!

PLEASE MARK ME AS BRAIN LIST IF MY ANSWER IS HELP FUL

Answer:

We need to add to the $3.00 we have at the start, what they gave him:

He started with $3.00 and received $10.00:

3.00 + 10.00 = $13.00

Then (when having $13.00) received $30.00:

13.00 + 30.00 = $43.00

Then (when having $43.00) received $100.00:

43.00 + 100.00 = $143.00

Then (when having $143.00) he had another $7.00:

143.00 + 7.00 = $150.00

The answer is $150

I initially had $3

My mom gave me $10

= $10+$3

= $13

My dad gave me $30, my aunt and uncle also gave me $100

= $100+$13+$30

= $143

I had another $7

= $7 + $143

= $150

This makes it a total of $150

Hence the amount i have is $150

Please see the link below for more information

https://brainly.com/question/17490143?referrer=searchResults

Answer:

The vertical line test can be used to determine whether a graph represents a function. If we can draw any vertical line that intersects a graph more than once, then the graph does not define a function because a function has only one output value for each input value.

Step-by-step explanation:

Answer:

The answer is no

Answer:

Coplanar is when all 3 points are on the same plane

Noncoplanar is when they are not

For ex:

Coplanar->

.x, .z, and .s are all on the plane R

Noncoplanar->

.x, and .z are on plane R

.s is on plane Y

Answer:

2/3 +8/3=10/3

Step-by-step explanation:

Answer:

-19

Step-by-step explanation:

Let's assume we are owing two people 6 dollars  and the other person 13 dollars u have no gain

Step-by-step explanation:

Two of the sides are 4 and 5.  The other four sides are 1, 2, 3, and 6.

The probability of rolling a number other than 4 or 5 on any roll is 4/6, or 2/3.

The probability of rolling no 4s or 5s six times is:

P = (2/3)⁶

P ≈ 0.088

Answer:

y = 120º

Step-by-step explanation:

180 - (33 + 87) = 60

x = 60

180 - 60 = 120

y = 120º

or y = 33 + 87, because the outer angle of one angle equals the other two inner angles.

Answer: 120°

Step-by-step explanation:

If you add up all the triangles angles, it always is 180. So, when you add 33+87, you get 120. This means that x=60 because 120+60 =180.

Then, you also know that x and y together, make a 180° also because it is a straight line. So, y is equal to 120° because 60+120 = 180°.

Hope this helps! :)

Answer:

8-7x=-43.

-7x= -43-8.

-7x= -51.

x= 7.285714286~7.3

Answer: The number is -5 or its value is equivalent to -5.

Step-by-step explanation:

So we are given the equation:

eight subtracted from seven times a number is -43

So we have to find what that unknown number is. We can do this by adding 8 to -43 which gives us -35. Now divide -35 by 7, and your answer is -5.

So the number is -5 or its value is equivalent to -5.

6/8 skkssbjsjdsdhdhbddbd dhhdhshshs

Answer:

14/15

Step-by-step explanation:

To find the slope

m= ( y2-y1)/(x2-x1)

   = ( 3 - -11)/( 6 - -9)

    = ( 3+11)/( 6+9)

    = 14/15

Answer:

2.65

Step-by-step explanation:

Answer:

-13v^4 + v^3 - 10v (if simplified)

Step-by-step explanation:

combine like terms

(-7v^4 - 5v) - (-5v^3 - 2v)+ ( - 7v - 6v^4 - 4v^3)

-7v^4 + -6v^4 = -13v^4

-5v^3 + -4v^3 = v^3 (the five becomes positive because of the negative sign infront of the parenthesis) Example: -(-5v^3) = +5v^3

-13v^4 + v^3 -5v -(-2v) -7v (now we have the -2 left alone in the parenthesis which means it becomes positive too) Example: -(-2v) = +2v

-5v +2v - 7v = -3v -7v = -10v

Answer: -13v^4 + v^3 - 10v