5x + 2 = 7
X = ?
Can you please help me with this

Answer:

Give me change for a dollar, please" said the customer named Bob. - "I'm sorry," said Miss Jones, the cashier, after carefully searching the box, "but I can't do it with the coins I have." - "Can you then change half a dollar?" Miss Jones shook her head. Actually, he said, "I don't even have a quarter, a dime, or a nickel to change!" - "You don't have any coins?" asked Bob. - "Oh yes" said Miss Jones, "I have $ 1.15 in coins." What exactly were the coins in the cash register? Reason for the answer.

Step-by-step explanation:

Answer:

medio dólar, cuarto de cuatro dimes || half dollar, quarter four dimes

Answer:

c + (a + 1.70) = 6.70

Step-by-step explanation:

you start the equation by Subtracting how much more alan has to the total

(this will only be set as an equation do not actually solve it)

then add 1.70 to a

"

6.70 - 1.70 = a + c

(1.70 + a)

c + (a + 1.70)  = 6.70 "

Answer:

B=12

Step-by-step explanation:

I did the math.

Answer:

20 percent

40 percent

20 percent

20(.008) percent

Step-by-step explanation:

6) 54 - 45 = 9

45 / 9 = 5

100 / 5 = 20

20 percent

7) 60 - 36 = 24

60 / 24 = 2.5

100 / 2.5 = 40

40 percent

8) 30 - 24 = 6

30 / 6 = 5

100 / 5 = 20

20 percent

9) 24.99 - 19.99 = 5

24.99 / 5 = 4.998

100 / 4.998 approx. = 20.008

20.008 percent (or rounded 20 percent)

Step-by-step explanation:

To find the reciprocal, divide 1 by the number given. Simplify. Multiply the numerator by the reciprocal of the denominator. Multiply 65 6 5 by 1 1 .

The probability that exactly 12 of them are strikes is 0.09.

In this question,

Number of pitches, n = 22

Probability of throwing a strike for each pitch, p = 0.431

Then, q = 1 - p

⇒ q = 1 - 0.431

⇒ q = 0.569

Number of strikes, x = 12

The probability that exactly 12 of them are strikes can be calculated using Binomial expansion,

\(P(X=x)=nC_xP^{x}q^{(n-x)}\)

⇒ \(P(X=12)=22C_{12}(0.431)^{12}(0.569)^{(22-12)}\)

⇒ \(P(X=12)=22C_{12}(0.431)^{12}(0.569)^{10}\)

⇒ \(P(X=12)=(\frac{22!}{12!10!} )(0.431)^{12}(0.569)^{10}\)

⇒ P(X=12) = (646646)(0.000041)(0.00355)

⇒ P(X=12) = 0.09431 ≈ 0.09

Hence we can conclude that the probability that exactly 12 of them are strikes is 0.09.

Learn more about probability here

https://brainly.com/question/24180142

#SPJ4

Answer: -2.72 repeated

Step-by-step explanation: First off, you want to divide 60 by 22 which is 2 and 16/22. Now, you can convert this into a simpler fraction which is 2 and 8/11. 8/11 =.72 repeated. Because the problem was originally -60/22, you add your negative back to the 2. So, it's -2.72 repeated.

Answer:

9.3 ft

Step-by-step explanation:

b) h = \(tan \theta\)  x 17 is the required equation.

c) The height of the streetlight is 20.4 ft.

The height of the person is 6 ft.

The distance at which the person is standing from the streetlight = 12 ft.

The distance at which the person's shadow appears = 5ft.

a) Hence, we can make the following diagram.

The right triangle below gives a visual representation of the problem. It shows the known quantities and a variable 'h' to indicate the height of the streetlight.

b) Let's now find an equation trigonometric function involving the unknown quantity 'h'.

from the below diagram, we can say that,

\(tan \theta\) = h/base

base= 12+5=17

hence we have, \(tan \theta\) = h/17

h = \(tan \theta\)  x 17 is the required equation.

c) Now we have to find the height of the streetlight.

firstly let's find the value of \(\theta\),

\(\theta\) = tan 6/5.

\(tan^{-1}\)(6/5) = 50.2°

hence, tan 50.2 = h/17

                   1.20 = h/17

                         h= 1.20 x 17

                         h= 20.4 ft.

Hence, the height of the streetlight is 20.4 ft.

Read more about the trigonometric functions:

brainly.com/question/29492894

#SPJ4

Answer: (d)- 1.76 kg

Step-by-step explanation:

Given

The first laptop mass was 11 kg

The rate of mass decreases by 4.7% per year

In 1982, it was

\(\Rightarrow 11-11\times 4.7\%=11-11\times 0.047\\\Rightarrow 11(1-0.047)\ kg\)

In 1983, it was

\(\Rightarrow 11(1-0.047)-11(1-0.047)\times 0.047=11(1-0.047)^2\)

In 2019 i.e. after 38 years, it is

\(\Rightarrow 11(1-0.047)^38=11\times 0.953^{38}=1.76\ kg\)

Answer:

Equation of this line is y = 1

Step-by-step explanation:

We have to write an equation of a line passing through (0,1) and slope 0.

Standard equation of a line in slope form is y = mx + c

Where m = slope and c = y intercept.

Since m = 0

so y = c is the equation.

This line passes through (0,1)

so equation will be Y = 1

Equation of this line is y = 1

Step-by-step explanation:

Hope this helps:)

Answer:

y = 1

Step-by-step explanation:

Answer:

60

Step-by-step explanation:

Answer:

B

Step-by-step explanation

5 tops minus the 20 from coupon, to get the total

The equation given, 5x + 10y, does not represent the total amount of fiber in a package containing x apples and y oranges.

To calculate the total amount of fiber in a package containing x apples and y oranges, you would need to know the amount of fiber in each apple and orange and the number of apples and oranges in the package.

For example, if each apple contains 3 grams of fiber and each orange contains 2 grams of fiber, and there are x apples and y oranges in the package, the total amount of fiber in the package would be:

Total fiber = (3 grams of fiber per apple)(x apples) + (2 grams of fiber per orange)(y oranges)

Total fiber = 3x + 2y grams

what is number?

A number is a mathematical concept used to represent quantity or magnitude. Numbers can be used to count objects, measure distances or sizes, perform calculations, and describe various other mathematical concepts. The most basic types of numbers are the natural numbers, which include all positive integers (1, 2, 3, ...), and sometimes zero (0) as well. Other types of numbers include fractions, decimals, negative numbers, complex numbers, irrational numbers, and more. Numbers are a fundamental concept in mathematics and are used extensively in many fields, including science, engineering, economics, and finance.

To know more about number visit:

brainly.com/question/3589540

#SPJ11

We cannot say that the two events are independent since the probability of eating pizza and sushi together is not known. If the probability of eating both together is 0, then the events are mutually exclusive, and if the probability is greater than 0, then the events are dependent.

We cannot say that the events of Marco eating sushi and pizza are independent. Two events are independent if the occurrence of one does not affect the probability of the other. However, in this case, if Marco eats sushi for dinner, it reduces the probability that he will eat pizza for dinner since he never eats both together.

Similarly, if Marco eats pizza for dinner, it reduces the probability that he will eat sushi for dinner. Therefore, the events are not independent, and the occurrence of one event affects the probability of the other. In other words, the events are dependent.

To know more about Probability:

https://brainly.com/question/11234923

#SPJ4

Answer:

The answer would be B 35.

Step-by-step explanation:

34 is closest to 35.

The best estimate for (2.8 × 10^3) × (4.1 × 10^6) written in scientific notation is 1.148 × 10^10. To obtain this estimate, we multiply coefficients (2.8 and 4.1) and add the exponents (3 and 6) to get 11.48.

Since the result is greater than 10, we adjust the decimal point and increase the exponent by 1, giving us 1.148 × 10^10.

Scientific notation is a way to represent numbers that are very large or very small using powers of 10. It allows us to express these numbers concisely and easily compare their magnitudes. In this case, the multiplication of two numbers in scientific notation involves multiplying their coefficients and adding their exponents to obtain the final result in scientific notation.

To learn more about scientific notation click here : brainly.com/question/16936662

#SPJ11

the easiest way to find the median is to arrange the data in numerical order,

Arrange the data in numerical order: 18, 22, 25, 30, 35, 40

Count the number of data points in the dataset: 6 data points

The dataset has an even number of data points, the median is the average of the two middle values. (27.5)

The median is a measure of central tendency that tells us the middle value of a dataset. It is an important measure of central tendency because it is not affected by outliers or extreme values.

Arrange the data in numerical order. This is important because the median is the middle value of the dataset and it is easier to find when the data is in order.

Count the number of data points in the dataset. If the dataset has an odd number of data points, the median is the middle value. For example, if the dataset has 7 data points, the median would be the 4th value.

If the dataset has an even number of data points, the median is the average of the two middle values. For example, if the dataset has 8 data points, the median would be the average of the 4th and 5th values.

For example, let's say we have a dataset of the ages of 5 people: 20, 25, 30, 35, 40

Arrange the data in numerical order: 20, 25, 30, 35, 40

Count the number of data points in the dataset: 5 data points

The dataset has an odd number of data points, the median is the middle value. (30)

Another example: let's say we have a dataset of the ages of 6 people: 18, 22, 25, 30, 35, 40

In conclusion, the easiest way to find the median is to arrange the data in numerical order, count the number of data points and if the dataset has an odd number of data points, the median is the middle value. If the dataset has an even number of data points, the median is the average of the two middle values.

to know more about median refer here

brainly.com/question/28060453#

#SPJ11

The computation shows that the change in points is 89 3/4 points.

From the information, at the beginning of the day the stock market goes down 30 3/4 points and stays at this level for most of the day and at the end the stock market goes up 120 1/2 points.

Therefore, the change will be:

= 120 1/2 - 30 3/4

= 89 3/4

Learn more about computations on:

brainly.com/question/4658834

#SPJ4

Answer:

HEY IMAGE IS BLUR

Step-by-step explanation:

Answer:

\(x=-10-8 = -18\)

Step-by-step explanation:

Answer:

x=-10-8=18

Step-by-step explanation:

The present value of the income c over t1 years at the given annual inflation rate r is approximately 21,991.55.

To find the present value of the income c over t1 years at the given annual inflation rate r, we can use the present value formula:
\(PV = FV / (1 + r)^t\)
where PV is the present value, FV is the future value, r is the annual inflation rate, and t is the number of years.
First, let's find the future value (FV) of the income c over t1 years using the given equation c = 30,000 + 200t:
FV = 30,000 + 200(6) = 30,000 + 1,200 = 31,200
Next, we need to convert the annual inflation rate (6%) to a decimal:
r = 6 / 100 = 0.06
Now, we can use the present value formula to find the present value:
\(PV = 31,200 / (1 + 0.06)^6\)
Calculate the denominator:
\((1 + 0.06)^6 = 1.4185\)
Now, divide the future value by the calculated denominator:
PV = 31,200 / 1.4185 = 21,991.55
Therefore, the present value of the income c over t1 years at the given annual inflation rate r is approximately 21,991.55.

for such more question on  present value

https://brainly.com/question/30390056

#SPJ11

Answer:

C) x=y

hope it helps.

Possibly measurement error are recording error, differences in environmental conditions at the time of measurement.

Given in a famous experiment carried out in 1882, Michelson and Newcomb obtained 66 observations on the time it took for light to travel between two locations in Washington, D.C. A few of the measurements (coded in a certain manner) were 31, 23, 32, 36, 22, 26, 27, and 31.

An error in measurement is the difference between a taken measurement and the known actual value (the accepted true measurement) of what is being measured.

Here experiment was conducted to study the time taken for light to travel from one place to another place.

From the given problem obtained 66 observations are obtained.

Since the experiment conducted in different times, the density of the material changes with temperature/environmental conditions which may result the difference in measurement.

So possibly measurement error, recording error, differences in environmental conditions at the time of measurement, etc.

To learn more about measurement error visit brainly.com/question/28109798

SPJ4

So possibly measurement error, recording error, differences in environmental conditions at the time of measurement

Given In a famous experiment carried out in 1882, Michelson and Newcomb obtained 66 observations on the time it took for light to travel between two locations in Washington, D.C. A few of the measurements (coded in a certain manner) were 31, 23, 32, 36, 22, 26, 27, and 31.

Here experiment was conducted to study the time taken for light to travel from one place to another place.

From the given problem obtained 66 observations are obtained.

Since the experiment conducted in different times, the density of the material changes with temperature/environmental conditions which may result the difference in measurement.

So possibly measurement error, recording error, differences in environmental conditions at the time of measurement, etc.

Learn more about experiments on brainly.com/question/28449715

21124

This is an example of interviewer bias where the gender of the interviewer may have impacted the replies of the unmarried males in the poll.

This is an example of interviewer bias, where the gender of the interviewer may have influenced the responses of the unmarried men in the survey. The results may not accurately reflect the true opinions of the participants as their answers could have been affected by their desire to impress or please the interviewer.

This situation is an example of response bias, specifically interviewer bias, which occurs when the respondent's answer is influenced by the gender or characteristics of the interviewer, rather than their true preferences or opinions.

Visit here to learn more about  interviewer bias : https://brainly.com/question/4961173
#SPJ11

Answer: x=10

Step-by-step explanation:

x=10 because 10/5=2

Answer:

x = 10

Step-by-step explanation:

please Mark me brainliest

Answer:

i am pretty sure the answer is a. 6

Step-by-step explanation:

let me know if this is incorrect

Answer:

A. 6

Step-by-step explanation:

The slope of the line that divides the region bounded by the parabola \(y=5x-3x^2\)and the x-axis into two regions with equal area is 5.

To find the slope of the line that divides the region into two equal areas, we need to determine the point of intersection between the parabola and the x-axis. Since the line passes through the origin, its equation will be y = mx, where m represents the slope.

Setting the equation of the parabola equal to zero, we find the x-values where the parabola intersects the x-axis. By solving the equation\(5x - 3x^2 = 0\), we get x = 0 and x = 5/3.

To divide the region into two equal areas, the line must pass through the midpoint between these x-values, which is x = 5/6. Plugging this value into the equation of the line, we have y = (5/6)m.

Since the areas on both sides of the line need to be equal, we can set up an equation using definite integrals. By integrating the equation of the parabola from 0 to 5/6 and setting it equal to the integral of the line from 0 to 5/6, we can solve for m. After performing the integration, we find that m = 5.

Therefore, the slope of the line that divides the region into two equal areas is 5.

Learn more about: Parabola

brainly.com/question/11911877

#SPJ11

Step-by-step explanation:

In geometry, we have many formal definitions using defined words or terms. However, I can think of three words that are not formally defined. These words are point, line and plane. Even though these words are undefined we can describes them as follows:

1. Point. A point is an exact position or location in space.

It is important to understand that a point has no dimension (that is, actual size). So, it has no length, no width, and no height (thickness).

We usually named a point with a capital letter. In the coordinate plane, a point is named by an ordered pair, x,y .

Even though we represent a point with a dot, the dot can be very tiny or very large. Recall that a point has no size.

2. Line (Straight line)

A line has no thickness.

So, its length extends in one dimension.

The line extends in both directions without end (infinitely). A line has infinite length and has no width, no height.

We assume the line to be straight.

and can be drawn with arrowheads on both ends.

3. Plane

A plane is a flat surface with no thickness extending indefinitely in all directions and having two dimensions. So, it has infinite length, infinite width and has no height (thickness). Moreover, a plane is drawn as a four-sided figure resembling a parallelogram.

The representation of each concept is shown in the Figure below.