Determining a value of an expression

The number of days that Rosa can continue to buy breakfast and lunch with the money is; 12 days

We are given the following parameters;

Amount held by Rosa = $254

Amount per breakfast = $7

Amount per Lunch = $13

Thus;

Amount spent each day = $7 + $13

Amount spent each day = $20

Now, to find out how many days this money can last her if she doesn't get any more income is;

Number of days = 254/20 = 12 days with $14 left

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Probability is the branch of mathematics dealing with numerical descriptions of how likely a situation is to occur, or how likely it is that a proposition is true.

An expression for the probability of an event.

Probability of an event = Required number of event / Total number of possible events

Required number of events = 84

Total number of events = 320

Find the probability that both customers selected without replacement say service is poor.

customers say service is poor = 84 / 320

customer selected without saying service is poor= 83 / 319.

The final probability is: 84 ÷ 320 ×83 ÷ 319.

      = 6972 ÷ 201080

     = 1743 ÷ 25520

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Which of the following is an accurate definition for the power of a statistical test is C. The power of a statistical test refers to the probability of rejecting a false null hypothesis. This means that the test is able to correctly identify when there is a significant difference between two groups or conditions.

statistical tests are used to determine whether the results of an experiment are likely due to chance or whether there is a real effect. The null hypothesis states that there is no significant difference, while the alternative hypothesis states that there is. The power of a statistical test refers to the ability of the test to correctly reject the null hypothesis when it is false, and thus support the alternative hypothesis.

, the power of a statistical test is the probability of correctly rejecting a false null hypothesis, which indicates that there is a significant difference between two groups or conditions.

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Answer:

142.69

Step-by-step explanation:

142.70-0.01

is

142.69

Brainiest plz

Answer:

142.69

Step-by-step explanation:

A number 0.01 less than 142.7 is equal to 142.7 minus 0.01.

142.7 - 0.01 = 142.69.

Let me know if this helps!

Answer:

3/8

Step-by-step explanation:

(-1-(-4))/(0-(-8))

=3/8

A node or event with a duration of 0 days is a b. milestone

A milestone refers to an important event in a project that has a duration of zero days. It signifies the completion of a significant phase or task within the project. Milestones are numbers placed on roads, such as roads, railroads, canals, or borders. They can show distances to cities, towns, and other places or regions; or they can set their work on track with respect to a reference point.

They are found on the road, often by the roadside or in a warehouse area. They are also called mile markers (sometimes abbreviated MM), milestones, or mileposts (sometimes abbreviated MP). "mile point" is the term used for the medical field where distance is usually measured in kilometers rather than miles. "Distance marking" is a general term that has nothing to do with units.

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Answer:

2.5

Step-by-step explanation:

Answer:2380 minutes. By saying how many more minutes does an infant sleep than an adult in one week impies that you have to subtract how long an adult sleeps taken away from the amount of time an infinte sleeps. Once you get the answer you multiply it by seven.

Step-by-step explanation:

Answer:340 minutes

Step-by-step explanation:you subtract the amount an infant sleeps (820 minutes) by the amount an adult sleeps (480 minutes)

820-480=340

Answer:

m = 12

Step-by-step explanation:

(4p - m)= -4

1. Take off parenthesis

4p -m = -4

2. Replace p

4(2) - m = -4

8 - m = -4

m = 12

Answer:

m = 12

Step-by-step explanation:

4(2)=8

8 - m = -4

-8          -8

-m = -12

/-1     /-1

m = 12

Answer:

x=71

Step-by-step explanation:

Answer:

x=20

Step-by-step explanation:

2x-5=35

you wanna turn that -5 to a +5 and add that +5 to 35 and you'll get 40.

then divide 2x with 40 and your answer should be 20.

Answer:

y = 25·x shows a proportional relationship

a = 5·x + 5 does not show a proportional relationship

m = 105.25·n shows a proportional relationship

Step-by-step explanation:

An equation that shows a proportional relationship is of the form, y = kx

Where;

k = The constant of proportionality = y/x

Therefore, the equation, y = 25·x shows a proportional relationship

The constant of proportionality = k = y/x = 25

Similarly, the equation m = 105.25·n shows a proportional relationship

The constant of proportionality = k = m/n = 105.25

When the equation shows a proportional relationship, the graph of the equation passes through the origin, therefore, the equation of the form, y = m·x + c, where c = the y-intercept > 0, the equation does not show a proportional relationship

The equation a = 5·x + 5, which is of the form, y = m·x + c, with c = 5 > 0, therefore, does not show a proportional relationship.

Therefore;

y = 25·x shows a proportional relationship

m = 105.25·n shows a proportional relationship

a = 5·x + 5 does not show a proportional relationship.

Answer:

162

Step-by-step explanation:

a=\(\frac{a+b}{2} h\)

a=base and the base is 13 ft.

b= also means base which is 23 ft.

h= height which is 9 ft.

so 13+23 is 36

36/2 is 18

and 18 times 9 is 162

sorry for the lengthy answer but i hope this helps :) have a nice day !!

Answer:

.30 cents

Step-by-step explanation:

11-5=6

6 divided by 20

Answer:

A) -5 5/6

Step-by-step explanation:

Answer:

5x feet or x times 5.

Step-by-step explanation:

Principal = 2350=2350equals, 2350 rupeesperiod = 2=2equals, 2 yearstotal amount = 2867=2867equals, 2867 rupees The annual rate of interest is 6%.

We are given the principal amount, which is 2350 rupees, the period, which is 2 years, and the total amount, which is 2867 rupees. We need to find the annual rate of interest.

The formula to calculate the total amount with compound interest is:

Total Amount = Principal * (1 + Rate/100)^Period

Using the given values, we can rewrite the formula as:

2867 = 2350 * (1 + Rate/100)^2

Dividing both sides of the equation by 2350, we get:

(1 + Rate/100)^2 = 2867/2350

Taking the square root of both sides, we have:

1 + Rate/100 = sqrt(2867/2350)

Subtracting 1 from both sides, we get:

Rate/100 = sqrt(2867/2350) - 1

Multiplying both sides by 100, we have:

Rate = 100 * (sqrt(2867/2350) - 1)

Evaluating this expression using a calculator, we find:

Rate ≈ 6

Therefore, the annual rate of interest is approximately 6%.

The annual rate of interest for the given principal, period, and total amount is approximately 6%

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Answer:

x = 19.42

Step-by-step explanation:

8²+x²=21²

64+x²=441

-64      -64

x²=377

x=19.41648784

rounded is 19.42

Answer:

(2,1)

Step-by-step explanation:

Well first we single out y or x in one of the equations,

we’ll use 2x + y = 5 and single out y.

2x + y = 5

-2x to both sides

y = -2x + 5

So we can plug in -2x + 5 into y in 2x - 2y = 2.

2x - 2(-2x + 5) = 2

2x + 4x - 10 = 2

combine like terms,

6x - 10 = 2

Communicarice property

+10 to both sides

6x = 12

divide 6 to both sides

x = 2

If x is 2 we can plug 2 in for x in 2x + y = 5.

2(2) + y = 5

4 + y = 5

-4 to both sides

y = 1

(2,1)

Thus,

the solution is (2,1).

Hope this helps :)

The wingspan of the new model will be 2 times larger than the wingspan of the first model.

A scale model is a physical model of an object. Scale models are often used in engineering, architecture, and filmmaking, among other fields, to simulate the appearance or functionality of real-world objects.

According to the question, 1 cm of the scale model equals 6 meters of the airplane. Thus, to find the actual wingspan of the airplane, you can multiply the wingspan of the scale model by the ratio of the actual wingspan to the wingspan of the scale model, as shown below:

Wingspan of the airplane = Wingspan of the model × Ratio

To convert the scale model ratio from 1 cm = 6 meters to 1 cm = 3 meters, divide by 2. Since Selena's model has a wingspan of 10.7 cm, you can calculate the wingspan of the actual airplane using the equation above, as shown below:

Wingspan of the airplane = 10.7 × 6/1 = 64.2 m (for the first model)Wingspan of the airplane = 10.7 × 3/1 = 32.1 m (for the new model)

Now you can compare the wingspan of the two models to determine how the wingspan of the new model compares to the wingspan of the first model.

The wingspan of the new model will be 2 times larger than the wingspan of the first model, since 64.2 ÷ 32.1 = 2. Therefore, the correct answer is that the wingspan of the new model will be 2 times larger than the wingspan of the first model.

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Answer:

2) The domain would only include positive integers

Step-by-step explanation:

y cost for x person

x can't be negative or fraction.

9514 1404 393

Answer:

  x = -2

Step-by-step explanation:

Set q(x) = -4 and solve for x.

  q(x) = 1/2x -3 . . . . . . given

  -4 = 1/2x -3 . . . . . . . . q(x) = -4

   -1 = 1/2x . . . . . . . . . . add 3

  -2 = x . . . . . . . . . . . . . multiply by 2

The maximum number of hours that you can park in the garage if you wish to pay no more than $14 is 5 hours.

Here's how to calculate it:

Therefore, the maximum number of hours you can park in the garage if you wish to pay no more than $14 is 5 hours.

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Answer:

4^3/8+3([ 4 ])-5^2

[ 64 ]/8+3([ 4 ])-5^2

[ 64 ]/8+3([ 4 ])-[ 25 ]

[ 64 ]/8+[ 12 ]-[ 25 ]

[ 8 ]+[ 12 ]-[ 25 ]

[ 20 ]-[ 25 ]

[ -5 ]

Answer:

The final answer is -5.

Step-by-step explanation:

4^3 / 8 + 3 (7-3) - 5^2

4^3 / 8 + 3( 4 ) - 5^2

64 / 8 + 3( 4 ) - 25

64 / 8 + 12 - 25

8 + 12 -25

20 - 25

= -5

So the first part you subtract the numbers in brackets.

Then you reduce the powers as in simplifying them.

From there you multiply 3 and 4.

Then you divide 64 and 8

After that you do the rest just as they are.

HOPE IT HELPED

The estimate of the mean length of the insects Ciara found is 17 millimeters (mm).

To calculate an estimate of the mean length of the insects Ciara found, we need to find the weighted average of the lengths using the given frequencies.

Let's denote the lower limits of the length intervals as L1 = 0, L2 = 10, and L3 = 20.

Similarly, denote the upper limits as U1 = 10, U2 = 20, and U3 = 30.

Next, we calculate the midpoints of each interval by taking the average of the lower and upper limits.

The midpoints are M1 = (L1 + U1) / 2 = 5, M2 = (L2 + U2) / 2 = 15, and M3 = (L3 + U3) / 2 = 25.

Now, we can calculate the sum of the products of the frequencies and the corresponding midpoints.

This gives us (5 \(\times\) 5) + (6 \(\times\) 15) + (9 \(\times\) 25) = 25 + 90 + 225 = 340.

Next, we calculate the sum of the frequencies, which is 5 + 6 + 9 = 20.

Finally, we divide the sum of the products by the sum of the frequencies to find the weighted average, which is 340 / 20 = 17.

Therefore, the estimate of the mean length of the insects Ciara found is 17 millimeters (mm).

Thus, the mean length of the insects Ciara found is approximately 17 millimeters (mm).

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Given:

Rita covered 1 mile in 15 minutes.

She covered 3 miles in 30 minutes.

To find:

The rate at which she is riding.

Solution:

Let y be the number of miles covered in x minutes.

Rita covered 1 mile in 15 minutes. So, the point is (15,1).

She covered 3 miles in 30 minutes. So, the point is (30,3).

Slope of the line:

\(m=\dfrac{y_2-y_1}{x_2-x_1}\)

\(m=\dfrac{3-1}{30-15}\)

\(m=\dfrac{2}{15}\)

Therefore, she is riding \(\dfrac{2}{15}\) miles per minute.

The answer is D. 4:50 p.m.

What is the distance, speed, and time?

The time it will take for Greg to travel home can be calculated using the formula:

time = distance ÷ speed

Here, the distance is 5 miles and the speed is 15 miles per hour.

time = 5 miles ÷ 15 miles per hour = 1/3 hour

Therefore, it will take Greg 1/3 of an hour, or 20 minutes to travel home.

If he leaves work at 4:30 p.m., he will arrive home at:

4:30 p.m. + 20 minutes = 4:50 p.m.

Hence, the answer is D. 4:50 p.m.

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Answer:

\( \large{ \tt{❃ \: EXPLANATION}} : \)

\( \boxed{\large{ \tt{✧ \: MIDPOINT = ( \frac{x_{1} + x_{2}}{2} } \:, \frac{y_{1} + y_{2}}{2} ) }}\)

\( \large{ \tt{↦ \: ( \frac{1 + 3}{2} \: , \frac{2 + 4}{2} )}}\)

\( \large{ \tt{↦( \frac{4}{2} \:, \frac{6}{2} })}\)

\( \large{ \tt{↦ \underline{( \: 2 \:, 3 \: )}}}\)

\( \large{ \tt{✎ \: LET'S \: START}} : \)

\( ☯ \: \boxed { \large{\tt{y - y_{1} = m(x - x_{1})}}}\)

\( \large{ \tt{↬y - 3 = 3(x - 2)}}\)

\( \large{ \tt{↬y - 3 = 3x - 6}}\)

\( \large{ \tt{↬3x - 6 = y - 3}}\)

\( \large{ \tt{↬3x - y - 6 + 3 = 0}}\)

\(\large{ \tt{↬ \boxed{ \tt{3x - y - 3 = 0}}}}\)

\( \tt{✺ \: CHOOSE \: YOUR \: HABITS \: CAREFULLY \: ,THEY \: DECIDE \: YOUR \: FUTURE! \: ♪}\)

۵Hope I helped ! ツ

☼Have a wonderful day / evening ! ☃

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