PLSSSS HELP ME NOWW I DONT GET IT

Answer:

Correct option A

Step-by-step explanation:

Average rate = 260/4 = 65 mph

It increases by 12mph

So 65+12 = 77 mph

Correct option A

Answer:

Her usual time from home to school is 30 minutes

Step-by-step explanation:

At any point in time;

distance = speed * time

Here, we want to calculate the normal time she spent going from home to school

Let the normal time be x minutes

And the normal speed be t m/min

Today, she increased her speed by 20%

Her speed today will be t + 20/100 * t =

1.2t m/min

Her distance from how to school normally is

xt meters

Now what this means is that, at the increased speed, she was able to get to school 5 minutes earlier

What we are saying is although, she lost 20 minutes initially, she was able to beat down the lateness by 5 minutes

So, the time spent on her increased speed journey is;

(x-5) minutes

At any point in time, the distance will be equal;

Thus, mathematically;

xt = 1.2t(x-5)

xt = 1.2xt - 6t

6t = 1.2xt-xt

6t = 0.2xt

t cancels out

0.2x = 6

x = 6/0.2

x = 30 minutes

Answer:

$4 I believe

Step-by-step explanation:

hope this helps please mark brainliest if correct

Answer:

Option c is right:

(-6 , 2)

Step-by-step explanation:

( -6 , 2)

Answer:

(a) It implies that if many samples of the members of the fitness club were selected and many 95% confidence intervals were constructed, the true proportion of all members of the fitness club who would quit would be captured by about 95% of the intervals.

(b) It implies that there is a 95% confidence that the true proportion of all members of the fitness club who would quit if there is an increase in the fee will be captures by the interval 0.105 – 0.225 (i.e. calculated as 0.18 – 0.075 = 0.105 and 0.18 + 0.075 = 0.225).

(c.) No, as there are plausible values above 20 as it is not all the intervals that are below 20. The implication of this is that there is a possibility that more than 20% would quit.

(d) The implication of the condition is that the distribution of the sample is approximately normal. This gives the opportunity to do estimations. However, the it will not be possible to estimate the 2 critical values if the distribution is not approximately normal. .

Step-by-step explanation:

Note: This question is not complete. The complete question is therefore provided before answering the question as follows:

Members at a popular fitness club currently pay a $40 per month membership fee. The owner of the club wants to raise the fee to $50 but is concerned that some members will leave the gym if the fee increases. To investigate, the owner plans to survey a random sample of the club members and construct a 95% confidence interval for the proportion of all members who would quit if the fee was raised to $50.

(a) Explain the meaning of "95% confidence" in the context of this study.

(b) After the owner conducted the survey, he calculated the confidence interval to be 0.18 +/- 0.075. Interpret this interval in the context of the study.

(c.) According to the club’s accountant, the fee increase will be worthwhile if fewer than 20% of the members quit. According to the interval from part (b) can the owner be confident that the fee increase will be worthwhile? Explain.

(d) One of the conditions for calculating the confidence interval in part (b) is that np ≥ 10 and n(1 – p) ≥ 10. Explain why it is necessary to check this condition.

The explanation of the answer is now provided as follows:

(a) Explain the meaning of "95% confidence" in the context of this study.

It implies that if many samples of the members of the fitness club were selected and many 95% confidence intervals were constructed, the true proportion of all members of the fitness club who would quit would be captured by about 95% of the intervals.

(b) After the owner conducted the survey, he calculated the confidence interval to be 0.18 +/- 0.075. Interpret this interval in the context of the study.

It implies that there is a 95% confidence that the true proportion of all members of the fitness club who would quit if there is an increase in the fee will be captures by the interval 0.105 – 0.225 (i.e. calculated as 0.18 – 0.075 = 0.105 and 0.18 + 0.075 = 0.225).

(c.) According to the club’s accountant, the fee increase will be worthwhile if fewer than 20% of the members quit. According to the interval from part (b) can the owner be confident that the fee increase will be worthwhile? Explain.

No, as there are plausible values above 20 as it is not all the intervals that are below 20. The implication of this is that there is a possibility that more than 20% would quit.

(d) One of the conditions for calculating the confidence interval in part (b) is that np ≥ 10 and n(1 – p) ≥ 10. Explain why it is necessary to check this condition.

The implication of the condition is that the distribution of the sample is approximately normal. This gives the opportunity to do estimations. However, the it will not be possible to estimate the 2 critical values if the distribution is not approximately normal.

Answer:

25%

Step-by-step explanation:

The number of people who went to the local swimming pool in the;

first week = 1120

second week ( 105 fewer people) = 1120 - 105 = 1015

third week (135 more people) = 1015 + 135 = 1150

fourth week (310 fewer people|) = 1150 - 310 = 840

The percent decrease in the number of people who went to the pool over these four weeks

= (1120 - 840)/1120 * 100%

= 280/1120 * 100%

= 1/4 * 100%

= 25%

It means that the number of people who went to the local swimming pool over the 4 weeks decreased by 25%

Answer:

14. -32/3

15. -4 and 5

Step-by-step explanation:

hope it will help you

Answer:

Step-by-step explanation:

Answer:

answers below

Step-by-step explanation:

1. 3/10 x 5/3= 15/30 or 1/2

2. 1/10 x 8/5= 8/50

3. 5/8 x 5/4= 25/32

4. 5/12 x 4/3= 20/36

5. 1/4 x 10/9= 10/36

Answer:

(3, 27)

Step-by-step explanation:

I will use substitution method.

y = 30-x

y = 9x

30 -x = 9x

30 = 10x

x = 3

So far we have (3, ?).

Now that we know x, we can plug in x to one of the equation to find y. I will plug it in at the bottom equation.

y = 9(3)

y = 27

Now we know that the solution is (3, 27).

Answer:

5 mins.

Step-by-step explanation:

hope his helps good luck

Answer:

5 minutes

Step-by-step explanation:

Answer: Don’t quite understand what you are asking but the Y-Intercept = 15, and the slope would be -7. Hope this helps you

Step-by-step explanation:

Answer:

around 11,000?

Step-by-step explanation:

The number of ice cream scoops sold from the shop if it is rounded to the nearest a thousand are 12,111 and 11,589.

To write the large number at the nearest round, we use the nearest thousand of the number. The rounded to the nearest thousand of a number makes the calculation easy, and the result to understand batter.

To round a number to nearest thousand, follow the steps below-

An ice cream shop has a sign in their window that says, "We sell 12,000 scoops per month." The number of scoops has been rounded.

The options of this problem are-

The number of scoops sold if they rounded to the nearest thousand. As the nearest number is 11,589 which is less than the 1200 which shows some of the ice cream has been sold.

Also the number 12,111 can be rounded to 12000.

Hence, the number of ice cream scoops sold from the shop if it is rounded to the nearest a thousand are 12,111 and 11,589.

Learn more about the nearest thousand of a number here;

https://brainly.com/question/587947

Answer:

you have 10 cupcakes and give away 2 which is 20% of 10

Step-by-step explanation:

Answer:

The 3 things in order for a graph to be proportional is:

This means that as x increases, y increases and as x decreases, y decreases-and that the ratio between them always stays the same. The graph of the proportional relationship equation is a straight line through the origin.

Step-by-step explanation:

BRAINLIEST???

Hope This Helps!!!

Answer:

N27.00 remained to be shared between Kemi and Ojo

Step-by-step explanation:

We have an amount of N 45.00.

Sola received 40% of this amount, which means that 100% - 40% = 60% remained to be shared between Kemi and Ojo.

This amount is given by:

0.6*45 = 27

N27.00 remained to be shared between Kemi and Ojo

Answer:

$8.4

Step-by-step explanation:

take 42 divide by 5

Answer:

$8.40 will be saved by buying the shoes on sale

Step-by-step explanation:

10% of 42 is $4.20

therefore, 20% of 42 is twice the 10% amount = $8.40

Answer:

no he doesn't have enough, he has $257

he is short by $18 :)

Step-by-step explanation:

Answer:

y=3

Step-by-step explanation:

y + 3 = - y + 9

y + y = 9 - 3

2y = 6

y = 6/2

y =3

Answer:

Kendra still need at least at least 95 dollars for her bike

Answer:

a = 4.8

Step-by-step explanation:

9 - 4a + 12 = 6a - 27

21 - 4a = 6a - 27

48 - 4a = 6a

48 = 10a

4.8 = a

Answer:

The Area of the sector is: A = 95.4 cm²

Step-by-step explanation:

Given

Central angle Ф = 135°

radius r = 9 cm

To determine

Area of the sector = ?

The Area of the sector can be calculated using the formula

A = Ф/360 × πr²

substitute Ф = 135°, r = 9 and π = 3.14

A = 135/360 × (3.14) (9)²

A = 95.4 cm²

Therefore, the Area of the sector is: A = 95.4 cm²

Answer:

answer

Step-by-step explanation:

angle B=63

AC=23.5

AB=26.4

Answer:

In 5 days

Step-by-step explanation:

If you divide 1797 by 70 you will get 25.67 then divide 25 by 5 and you will get 5

Answer:

1/6

Step-by-step explanation:

A cube has six sides

Six probable outcomes

rolling a 2 can only happen on 1 of those outcomes

so 1/6

Answer:

1/6

Step-by-step explanation:

The Answer is 1/6

Answer:

2+2i = 2(1+i)

Step-by-step explanation:

2+2i = 2(1+i)

Answer:

it's -10

Step-by-step explanation:

because in the question they says below the surface of the water

so I think it's right

The upward is taken as positive and the downward is taken as negative. Then the integer can be represented as negative 10.

Sign convention means the rule that is used when the sign is to be changed. It is applicable only when the equation is considered.

You dive 10 feet below the surface of the water.

Then the negative sign should be used because we considered the right side as positive and the left side as negative similarly upward is taken as positive and downward is taken as negative.

Then the integer can be represented as negative 10.

More about the sign convention link is given below.

https://brainly.com/question/14303096

#SPJ2

Answer:

Step-by-step explanation:

The system of equations given are:

 5x - y + z = -6   ------------- i

 2x + 7y + 3z = 8  ---------- ii

  x + 2z = 6 ----------------- iii

Let us deal with equation i and ii first since they have 3 variables x, y and z;

      5x - y + z = -6                 x 7

       2x + 7y + 3z = 8            x 1

    35x  - 7y + 7z  = -42   ----  iv

      2x  + 7y + 3z  = 8       ---- v

Add equation iv and v;

    37x + 10z  = -34 ------vi

So, let us solve equation vi and iii:

               x + 2z = 6 - ---------- iii   x 10

               37x + 10z  = -34  --- iv  x 2

    10x + 20z   = 60         vi

     74x + 20z  = -68        vii

Subtract vi  - vii;

      -64x  = 128

          x  = -2

So;    put x  = -2 into iii;

           x + 2z  = 6

           -2 + 2z  = 6

            2z  = 6 + 2  = 8

           z  = 4

Put x  = -2 and z = 4 into equation i;

  5(-2) - y + 4  =  - 6

   -10 -y  +4  = -6

       -6  - y  = -6

             -y  = 0

              y  = 0