A vendor bought a supply of ice cream bars at three for 20 cents. He ate one and sold the remainder at 10 cents each. If he made $200.00, how many bars did he buy?

Answer:

108 ft long

Step-by-step explanation:

they both form similar triangles like shape

therefore

[tex] \frac{4}{9} = \frac{48}{x} [/tex]

[tex]x = \frac{9(48)}{4} [/tex]

[tex]x = 108[/tex]

Answer:

x=3

Step-by-step explanation:

Hello,

The first thing you do is set up your equation, and we are solving for x so we are going to get x by itself on one side of the = sign.

       2x/3+1=3        First thing: subtract 1 from BOTH sides.

               -1  -1

----------------------

          2x/3=2       Multipliy by 3 on both sides

              *3 *3

-----------------------

            2x=6         Divide by 2 on both sides

             /2 /2

-----------------------

           x=3

I hope this helped you!!!

Answer:

This was an increase of 22%

Step-by-step explanation:

Given:

Initial/Old amount = $438.00

New amount = $534.36

The percentage increase = [tex] \frac{new amount - old amount}{old amount}*100 [/tex]

% increase = [tex] \frac{534.36 - 438.00}{438.00}*100 [/tex]

[tex] = \frac{96.36}{438.00}*100 = \frac{96.36*100}{438.00} [/tex]

[tex] = \frac{9636}{438.00} = 22 [/tex]

This was an increase of 22%.

Answer:

1,3,4,6 answer

Step-by-step explanation:

Answer: 9 million

Step-by-step explanation:

The population of the world in 2018 using this model is 7.5 billion.

If a constant rate of growth be R% per annum, then population after n years = P(1+R/100)ⁿ.

Given that, P= 6.8 billion and rate of growth =1.13%.

Now, 6.8(1+1.13/100)ⁿ

= 6.8(1+0.0113)ⁿ

= 6.8(1.0113)ⁿ

a. The population of the world in 2018 using this model.

So, time period is n=9

Now, 6.8(1.0113)⁹

= 7.5 billion

b. World population is 2018 was 7.6 billion

The difference between the estimate from the internet and the answer in part (a) is 7.6-7.5

= 0.1 billion

c. Estimate the year when the world population will be 9 billion

9=6.8(1.0113)ⁿ

(1.0113)ⁿ=1.32

n=24.7 years

Therefore, the population of the world in 2018 using this model is 7.5 billion.

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Answer:

find the area of two triangles and subtract them.

Triangle 1 = 1/2 x 20 x 20 = 200

Triangle 2 = 1/2 x 15 x 10 = 75

Area of shaded region: 200 - 75 = 125

The answer is F. 125

Answer:

The crowd would cover an area of 100000 square feet of the field.

Step-by-step explanation:

The length of the football field = 1[tex]\frac{1}{2}[/tex] miles

1 mile = 5280 feet

So that, 1[tex]\frac{1}{2}[/tex] miles = 7920 feet

Given that the field was 12 feet deep on both sides implies that the width = 24 feet.

To estimate the size of the crowd,

length of field = 5000 feet

width = 20

Area of the field covered by the crowd = length × width

                                              = 5000 × 20

                                              = 100000

The crowd would cover an area of 100000 square feet.

Answer:

quantity of red paint =  12.5 gallons

quantity of blue paint =  7.5  gallons

Step-by-step explanation:

Ratio of red and blue paint : 5:3

in ratio

a:b = ax:bx

let the

quantity of red paint be 5x

quantity of blue paint be 3x

then quantity of purple paint = quantity of red paint  + quantity of blue paint

                                                  = 8x

given quantity of purple paint is 20 gallons

thus,

8x = 20

x = 20/8 = 2.5

thus,

quantity of red paint = 5x = 5*2.5 = 12.5 gallons

quantity of blue paint = 3x = 3x*2.5 = 7.5  gallons

Answer:

7 and 12.5

Step-by-step explanation:

Answer:  The difference is approximately $44. Remember that is not an exact amount because the weeks are approximated and the second offer was also approximated.

Step-by-step explanation:

If one has $61,100 and the other has 63,400 annually which means that is the amount they will be offered a year. So first we need to determine how many weeks are in a year.There are approximately 52 weeks in one year so we will divide the salaries by 52 to find how much they each offer in one week.

First Offer:  61,100 / 52 =  1175  

Second Offer:  63,400/52=  approximately 1219    

Now find the difference between the numbers

1219. - 1175 =  $44

The difference in weekly pay for these two job will be around $0.04k.

Arithmetic operators are four basic mathematical operations in which summation, subtraction, division, and multiplication involve.,

Summation = addition of two or more numbers or variable

For example = 2 + 8 + 9

Subtraction = Minus of any two or more numbers with each other called subtraction.

For example = 4 - 8

Division = divide any two numbers or variable called division.

For example 4/8

Multiplication = to multiply any two or more numbers or variables called multiplication.

For example 5 × 7.

Number of weeks in 1 year = number of weeks in 1 month × 12

Number of weeks in 1 year = 4 × 12 = 48

Annual salary in the first job = $61.1k

So weekly salary of first job =$1.28k

Annual salary in the second job = $63.4k

So weekly salary of second job = $1.32k per week

Difference between weekly pay = 1.32 - 1.28 = 0.04k

Hence "The difference in weekly pay for these two job will be around $0.04k".

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Answer:

1/6

Step-by-step explanation:

For a set of vectors a, b and c to be linearly dependent, the linear combination of the set of vectors must be zero.

C1a + C2b + C3c = 0

From the question, we are given the set S={u−3v,v−2w,w−ku}, the corresponding vectors are a(0, -3, 1), b(-2,1,0) and c(1,0,-k)

The values in parenthesis are the ccoefficients of w, v and u respectively.

On writing this vector as a linear combination, we will have;

C1(0, -3, 1) + C2(-2,1,0) + C3(1,0,-k) = (0,0,0)

0-2C2+C3 = 0........ 1

-3C1+C2 = 0 ........... 2

C1-kC3 = 0 ….......... 3

From equation 2, 3C1 = C2

Substituting into 1, -2(3C1)+C3 = 0

-6C1+C3 = 0

-6C1 = -C3

6C1 = C3.…..4

Substitute 4 into 3 to have

C1-k(6C1) = 0

C1 = k6C1

6k = 1

k = 1/6

Hence the value of k for the set of vectors to be linearly dependent is 1/6

Answer:

n=11 is the answer.

Step-by-step explanation:

19+n=30

In order to find the value of n subtracting 19 on both sides

19-19+n=30-19

n=11 is your answer

Hope it will help you :)

Answer:

The correct option (c) "is held together by ionic bonds".

Step-by-step explanation:

Table salt is NaCl. It is a combination of Sodium and Chlorine.

There is 1 valance electron in sodium. Its electronic configuration is 2,8,1

The electronic configuration of Chlorine is 2,8,7. It means that it needs 1 electron so that its octet gets completed.

Na transfers one electron to Cl. It becomes Na⁺. Cl gains one electron From Na. It becomes Cl⁻.

As a resuslt, Na⁺ and Cl⁻ forms. Both Na and Cl are ions. They held together by ionic bonds.

Answer:

Proved

Step-by-step explanation:

Given

Integers: a and b

Where [tex]a < b[/tex]

Required

Show that [tex]a^n < b^n[/tex]

We start by writing out the given expression

[tex]a < b[/tex]

Then, take nth root of both sides

[tex]a^n < b^n[/tex]

For instance:

Let a = 2,  b = 2 and n = 4

First

Since [tex]2 < 3[/tex]

Then

[tex]2^4 < 3^4[/tex]

[tex]16 < 81[/tex]

Proved

This is so for all positive values of a,b and n where a < b

Answer:

both answer is 31°

Hope it is helpful for you

Answer:

d. A hypothesis is derived from the evidence at hand; the evidence produces the hypothesis.

Step-by-step explanation:

Null hypothesis is a statement that is to be tested against the alternative hypothesis and then decision is taken whether to accept or reject the null hypothesis. The evidence suggests that a certain hypothesis is tested for its reliability. The hypothesis is accepted or rejected on the basis of its underlying evidences.

Answer:

  see attached

Step-by-step explanation:

It usually works to follow instructions. Here are your two points.

Answer:

RK= 13      SK= 12

Step-by-step explanation

First, we find the missing length of RK using the given information: 65-52=13

Then we divide 65 by 13 to get a scale factor: 65/13=5

(To check, we multipuly: 13*5=65)

We then apply the scale factor to MK to find SK: 60/5=12

(To check we multipuly: 5*12=60)

We now have our answers: RK:13, SK:12

Answer:

4 units

Step-by-step explanation:

The volume of a square pyramid is (a²)*h/3

256=a²*12/3

256=a²*4

256/4=a²

64=a²

a=8

Now we know that the square is 8 by 8.

The volume of a square prism is a²h

256=64h

256/64=h

h=4

Also, a square pyramid is 1/3 the volume of a square prism.

12÷3=4

Answer:

the answer is C    4 units

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

The simpler way to calculate this question is just to calculate A and B

A - 4 x (7+2) = 4 x 9 = 36

B - (4 x 7) + 2 = 28 + 2 = 30

A = 36

=> Thus, our answer is A

Hope this helps!

Answer:

A. 4 * (7+2)

Step-by-step explanation:

Let's evaluate choice A and B. Solve each expression according to PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.

The option that equals 36 will be the correct choice.

A.

4 * (7+2)

Solve the parentheses first. Add 7 and 2.

4 * (9)

Multiply 4 and 9.

36

B.

(4*7)+2

Solve the parentheses first. Multiply 4 and 7.

(28)+2

Add 28 and 2.

30

When evaluated, choice A equals 36. Therefore, A is correct. When the parentheses are arranged like so: 4 * (7+2) it will be equivalent to 36.

Answer:

9x-7

Step-by-step explanation:

AB =3x-2

BC= 6x-5

AC=AB+AC

AC=(3X-2)+(6X-5)

AC=3X-2+6X-5

AC=3X+6X-2-5

AC=9X-7

Answer:

5/14

Step-by-step explanation:

you would just add the number of marbles which is 14 and add the green and red marbles which is 5 and your answer is 5/14

Probability helps us to know the chances of an event occurring. The probability of choosing a green or red marble from the bag is 5/14.

Probability helps us to know the chances of an event occurring. It is always the ratio of desired outcomes or the sample that is needed to the total number of outcomes.

[tex]\rm Probability=\dfrac{Desired\ Outcomes}{Total\ Number\ of\ outcomes\ possible}[/tex]

Given that the bag that contains two blue marbles, one green marble, seven white marbles, and four red marbles.

Now, the total number of marbles in the bag is 14.

Therefore, the probability of choosing a green or red marble from the bag is,

Probability = (Number of green and red marbles)/(Total number of marbles)

                  = (1+4)/(2+1+7+4)

                  = 5/14

Hence, the probability of choosing a green or red marble from the bag is 5/14.

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Answer:

30°

Step-by-step explanation:

60+60+2x=180

120+2x=180

2x=180-120

2x=60

x=30°

Answer:

0.33

Step-by-step explanation:

We would like to find the probability that both beads are aqua.

There are 6 aqua beads. Let's calculate the number of ways we can select 2 aqua beads from these 6. We use combinations, which is [tex]_6C_2=\frac{6!}{(6-2)!*2!}[/tex], where the n! means n * (n - 1) * (n - 2) * ... * 2 * 1.

The value of the expression is:

[tex]_6C_2=\frac{6!}{(6-2)!*2!}=\frac{720}{24*2} =15[/tex]

So there are 15 ways to choose 2 aqua beads.

Now let's calculate the number of ways we can select any 2 beads. There are 6 + 4 = 10 beads in total, so we do the same thing as before using combinations:

[tex]_{10}C_2=\frac{10!}{(10-2)!*2!} =\frac{3628800}{40320*2} =45[/tex]

Our fraction is thus:

15 / 45 = 1/3 ≈ 0.33

The answer is thus 0.33.

~ an aesthetics lover

Complete Question

It has been found from experience that the mean breaking strength of a particular brand of thread is 9.72 oz with a standard deviation of 1.4 oz. Recently a sample of 36 pieces of thread showed a mean breaking strength of 8.93 oz. Can one conclude at a significance level of (a) 0.05, (b) 0.01 that the thread has become inferior?

Answer:

At both [tex]\alpha = 0.05[/tex] and  [tex]\alpha = 0.01[/tex]  the conclusion is that the thread has become inferior

Step-by-step explanation:

From the question we are told that

      The population  mean is  [tex]\mu = 9.72 \ oz[/tex]

      The standard deviation is  [tex]\sigma = 1.40\ oz[/tex]

       The sample size  is  n =  36

        The sample mean is  [tex]\= x = 8.93 \ oz[/tex]

The  null hypothesis is  [tex]H_o : \mu = 9.72 \ oz[/tex]

The  alternative hypothesis is  [tex]H_a : \mu < 9.72 \ oz[/tex]

     Generally the test statistics is mathematically represented as

             [tex]t = \frac{ \= x - \mu }{ \frac{\sigma }{ \sqrt{n} } }[/tex]

=>        [tex]t = \frac{ 8.93 -9.72}{ \frac{ 1.4 }{ \sqrt{36} } }[/tex]

=>      [tex]t = -3.33[/tex]

So  

    The  p-value obtained from the z- table is  

            [tex]p-value = P( Z < -3.39) = 0.00034946[/tex]

So at  [tex]\alpha = 0.0 5[/tex]

     [tex]p-value < \alpha[/tex]

So we reject the null hypothesis,hence we conclude that the thread has become inferior

  So at  [tex]\alpha = 0.0 1[/tex]

     [tex]p-value < \alpha[/tex]

So we reject the null hypothesis,hence we conclude that the thread has become inferior

Answer:

$578.87

Step-by-step explanation:

Find the area made by the circle made by the 3 ft. walk:

Radius = 17 + 3 = 20

Area = 22/7 x 20 x20 = 1257.14

Find the area made by the pond:

Area = 22/7 x 17 x 17 = 908.29

Subtract area 2 from area 1:

1257.14 - 908.29 = 348.85

Muliply this area by the cost er squar foot:

348.85 x $1.66 = 579.09

It depends on the value of pi used

Answer:

The heaviest 5% of fruits weigh more than 747.81 grams.

Step-by-step explanation:

We are given that a particular fruit's weights are normally distributed, with a mean of 733 grams and a standard deviation of 9 grams.

Let X = weights of the fruits

The z-score probability distribution for the normal distribution is given by;

                              Z  =  [tex]\frac{X-\mu}{\sigma}[/tex]  ~ N(0,1)

where, [tex]\mu[/tex] = population mean weight = 733 grams

            [tex]\sigma[/tex] = standard deviation = 9 grams

Now, we have to find that heaviest 5% of fruits weigh more than how many grams, that means;

                    P(X > x) = 0.05       {where x is the required weight}

                    P( [tex]\frac{X-\mu}{\sigma}[/tex] > [tex]\frac{x-733}{9}[/tex] ) = 0.05

                    P(Z > [tex]\frac{x-733}{9}[/tex] ) = 0.05

In the z table the critical value of z that represents the top 5% of the area is given as 1.645, that means;

                               [tex]\frac{x-733}{9}=1.645[/tex]

                              [tex]{x-733}}=1.645\times 9[/tex]

                              [tex]x = 733 + 14.81[/tex]

                              x = 747.81 grams

Hence, the heaviest 5% of fruits weigh more than 747.81 grams.

Answer:

y=-2x+15

Step-by-step explanation:

First, write out the equation in slope-intercept form, with what you already have:

[tex]y=-2x+b[/tex]

Let "b" represent the y-intercept.

To find the y-intercept, substitute the point (6,3) in for the "x" and "y" variable of the equation and solve for "b":

[tex]3=-2(6)+b\\3=-12+b\\3+12=-12+12+b\\15=b[/tex]

Therefore, your y-intercept is 15.

That means your equation is slope-intercept form is y=-2x+15.

Answer:Ten dollars per hour

Step-by-step explanation:

50 hour =500 dollars

1 hour = ?

Using the criss cross method we multiply one hour by five hundred dollars and divide by fifty dollars.

?=(1 hour×500 dollars)/50 hour

?= 500 dollars/50

?=10 dollars per hour