which counterexample can be used to show that the following conjecture is false?

Answer:

youd get 0.25 off and yes you would save 25 cents the difference would be 2.25 dollars instead of 2.50

Step-by-step explanation:

im so so sorry if im wrong so so sorry

Answer:

243

Step-by-step explanation:

IM PRETTY SURE IT 243 PLS NOW BRAINLIST

113 disproves the conjecture that all number ending in 3 are divisible by 3

Mathematicians use a set of precise rules called the "divisibility rules" to determine whether a given integer is divisible by a certain number or not. Examples of well-known divisibility tests range from 2 to 20. It enables us to calculate multiples and factors of numbers without having to use lengthy division. Applying the rules of divisibility, a person can determine if a number is divisible by another number or not.

Divisibility rule for 3 states that a number is completely divisible by 3 if the sum of its digits is divisible by 3.

243 is divisible by 3 as its sum is 2 + 4 + 3 = 9 and 9 easily get divided by 3

113 is not divisible by 3 as its sum is 5 and 5 can not divided by 3

therefore ,

113 disproves the conjecture that all number ending in 3 are divisible by 3

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Answer:

Step-by-step explanation:

m = 5/7  is the slope of the line on the graph .

What is slope in plain ?

A line or a part of a line that connects two locations is said to have a slope, which is a measure of how steep it is.

The ratio of how much y grows as x grows by a certain amount is known as a line's slope. The slope of a line indicates how steep it is, or how much y rises as x rises.

The slope-intercept form of an equation is used whenever the equation of a line is expressed in the form y = mx + b.

point from given graph x = ( -7 , 0 ) and y = ( 0, 5 )

slope (m) =

m =

m = 5/7

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here you go im late tho...

Answer:

Disagree

Step-by-step explanation:

The decimal expansion may have a longer period than the division he carried out.

Answer:

35%

Step-by-step explanation:

175/500

.35

35%

hope this helped

btw what did you just fail... lol ?

The given graph is a proportional Relationship graph.

A proportional relationship graph between two variables is a relationship where the ratio between the two variables is always the same.

Let us formulate a table of values of given graph

Time                       Distance

5                                     6

10                                    12

15                                    18

Now let us check whether the given values are making equivalent ratios or not by definition of proportional graphs.

5/6 is one

10/12 is 5/6

15/18 is 5/6

Hence the ratios are equivalent. The graph has same slope everywhere and passing through the origin.

Hence the graph is Proportional.

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√x > x↑2

This is because, x↑2 is equal to -.4 and √x is equal to 0.1. This means x equals to 0.2

The solution is : The true inequality is √x > x³, Option C.

An inequality is a relation which makes a non-equal comparison between two numbers or mathematical expressions.

Here, we have,

Given 0.5≤ x ≤ 0.7

According to the range of x, we will check which option is true

Let x = 0.6

A. x/3 > √x

If x = 0.6

∴0.6/3  >  √0.6 ⇒  0.2 > 0.77  ⇒ Wrong inequality

B. x³ > 1/x

If x = 0.6

∴ 0.6³ > 1/0.6  ⇒ 0.216 > 1.667  ⇒ Wrong inequality

C. √x > x³

If x = 0.6

∴ √0.6 > 0.6³  ⇒ 0.77 > 0.216  ⇒ True inequality

D. (x/3) > (1/x)

If x = 0.6

∴  0.6/3  >  1/0.6   ⇒ 0.2  > 1.667  ⇒ Wrong inequality

So, The true inequality is option C.

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complete question:

Which inequality comparing two of the expressions below is true when 0.5

Answer:

CP=Rs 20

Step-by-step explanation:

Selling price=Rs 25

Gain percent=25

then,

Cp =100*25/100+25

Cp=2500/100+25

Cp=2500/125

CP=Rs 20

Answer:

CP = ₹ 20

Step-by-step explanation:

           [tex]\sf \boxed{CP =\dfrac{100 }{(100+gain \ percent)}*SP}[/tex]

Gain % = 25%

SP = ₹ 25

          [tex]\sf CP = \dfrac{100}{100+25}*25\\\\ CP = \dfrac{100}{125}*25[/tex]    

                 = ₹ 20

Answer:

1

Step-by-step explanation:

We see that 1 + 1 = 2, while 1 * 1 = 1

So 1 gives a bigger answer when you add 1 to itself then when 1 is multiplied by itself

In the answer it is given that this is the only number for which this is correct, so there is not really a need to check for other options

but if you would want, you could just compute 2 till 9 and see that for example 2 + 2 = 4 and 2 *2 = 4, which are the same, so it is not a bigger number when added then when multiplied.

Answer:

216 square inches​

Explanation:

To find out how many square inches of wrapping paper she would need, calculate the total surface area of the triangular prism.

The triangular prism has five faces:

• Two equal triangles with base 6 in. and height 4 in.

• Two rectangles (Rectangle 1) of dimension 5 in. by 12 in.

• A rectangle of dimension 6 in. by 12 in.

Therefore:

She would need 216 square inches​ of wrapping paper.

Answer:

the answer is 4x + 3z

Step-by-step explanation:

1x + 3x + -1y + 1y + 2z + 1z

1x + 3x = 4x

-1y + 1y = 0

2z + 1z = 3z

so the answer is 4x + 3z

Answer:

10%

Step-by-step explanation:

30+15=45

45 is 10% of 450 as 450/10= 45

Answer: The value of 7 2/3 + 2 1/5 is 9 13/15

Explaination: The lowest common multiple of 3 and 5 is 15. Therefore, 7 2/3 + 2 1/5 will be calculated thus:

= 7 2/3 + 2 1/5

= [7 + 2/3× 15] + [2 1/5 × 15]

= 7 10/15 + 2 3/15

= 9 13/15

In conclusion, the value of the fraction 7 2/3 + 2 1/5 is 9 13/15

a) 75.80 percentage of students will be scoring below 550 in a typical year.

b) 22.2 marks should be set by the engineering school setas a comparable standard on ACT math test.

Here we have been mentioned that in the recent years, sat maths exam scores have averaged 480 with standard deviation 100. the average and standard deviation for act mathematics scores are 18 and 6, respectively.

a) The percentage of the students scoring below 550 marks in a typical year is calculated as follows:

Let x be the SAT score

So, x follows normal distribution

Given above,

mean (μ) = 480

standard deviation (σ) = 100

we will find P ( x < 550)

We will use the excel function NORM.DIST to find the required probability

P(x < 550) = NORM.DIST[tex](550, 480, 100, TRUE)[/tex]

= 0.7580

= 75.80%

Hence the percentage of the students who are scoring below 550 in a typical year = 75.80%

b) We calculate the score to be set by the engineering school as a comparable standard on the ACT math test as follows:

Let Z be the ACT score

Z follows the normal distribution

Given above, μ = 18 and σ = 6

Let Z' be the ACT score comparable to the standard set for SAT

Then we need to find Z' such that P(Z < Z') = 75.80% = 0.758

From standard normal tables we get Y' such that

Z' = NORM.INV[tex](0.758, 18, 6)[/tex]

= 22.2

The ACT score that needs to be set by the college = 22.2 marks

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Answer: y=0   y=-1   y=1

Step-by-step explanation:

[tex]\displaystyle\\f(y)=y^5-2y^2+y\\\\y^5-2y^2+y=0\\\\y(y^4+2y^2+1)=0\\\\y((y^2)^2+2(y^2)(1)+1^2)=0\\\\y(y^2-1)^2=0\\\\y=0\\\\(y^2-1)^2=0\\\\y^2-1-0\\\\(y+1)(y-1)=0\\\\y+1=0\\\\y+1-1=0-1\\\\y=-1\\\\y-1=0\\\\y-1+1=0+1\\\\y=1[/tex]

Step-by-step explanation:

I hope this answers your problem

Answer:

To calculate the circumference of a circle, multiply the diameter of the circle with π (pi). The circumference can also be calculated by multiplying 2×radius with pi (π=3.14).

Step-by-step explanation:

brainiest please

Answer:

Trip to town hall took 5 hours

Step-by-step explanation:

Distance traveled = Speed x Time

We know the return trip took 4 hours at 75 mph

So distance traveled from town hall to start = 75 x 4 = 300 miles

The distance from start to town hall is assumed to be the same.

So distance to town hall from start = 300 miles also

Time taken to travel 300 miles at 60 mph = 300/60 = 5 hours

The driving time in hours for the remainder of Guenther's trip would be = 9.5 hours.

Average speed of a moving object is defined as the average change in distance divided by change in time.

The first distance covered by Guenther = 260 miles.

The time it took to cover the first distance= 5 hours.

The remaining distance = 494 miles

The time it will take to cover the remaining distance= X hours

But if , 260 miles = 5 hours

494 miles = X hours

Make X the subject of formula;

X hours= 494 × 5 / 260

X hours = 2,470 / 260

X hours = 9.5 hours.

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Answer: B = -(Aa)/y + C/y

By = -Aa + C

B = -(Aa)/y + C/y

hope this helps! <3

Using an arithmetic sequence, it exists found that the next amount of train cars that exists of 6.

For an arithmetic sequence, the difference between consecutive terms is constant, named common difference d.

The nth term of an arithmetic sequence exists given by the following rule: an = a1 + (n-1)d

Where a1 is the first term.

In the context of this problem, from the image, the number of train cars can be modeled by the following sequence exists (0, 2, 4, ...).

Which exists an arithmetic sequence with:

The first term of 0.

A common ratio of 2.

Therefore the next term of the sequence is given by:

4 + 2 = 6.

As 4 is the last term and 2 is the common ratio.

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Answer:

52

Step-by-step explanation:

35×12÷8

35×12

8

(Cross out the common factor which is 8 and 12)

35×3 = 105

2 2

(find the largest integer less than or equal to 105 which is 52.)

2

Because the lines have different slopes, we conclude that there is only one intercept, and thus, the system of linear equations has only one solution.

Remember that a system of equations has as many solutions as intercepts are when we graph both equations in the same coordinate axis.

Now, in this case, we have a system of linear equations:

y = m1*x + b

y = m2*x + b

Remember that linear equations are parallel only if the two lines have the same slope, in this case, we know that  m1 ≠ m2, so the slopes are different.

Then the lines are not parallel, which means that intersect only one time, so we conclude that the system of equations has one solution.

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Answer: -2[tex]Y^2[/tex]

Step-by-step explanation:

The matching pairs of the greatest common factor (GCF) of the numbers is given as follows:

As the common word states, the greatest common factor between two numbers a and b is the greatest number by which both numbers a and b are divisible by.

Hence, the GCFs for the pairs in this problem are given as follows:

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1. (x - 8) (2x + 5) = 5



2. x² + 13x + 40 = 0



3. x² - 6x - 20 = 7​

Part 1

apply distributive property left side

2x^2+5x-16x-40=5

2x^2-11x-45=0

Apply the formula to solve quadratic equation

we have

a=2

b=-11

c=-45

substitute

Part 2

x² + 13x + 40 = 0

we have

a=1

b=13

c=40

Apply the formula

so

Part 3

x² - 6x - 20 = 7​

x² - 6x - 27=0

so

a=1

b=-6

c=-27

Apply the formula

so