PLEASE THESE QUESTIONS ARE KILLING ME AND I NEED HELP ASAP !!

The number of messages are: Martina sent 21 messages, Ryan sent 14 messages, and Keith sent 42 messages.

We may build equations that link unknown values in a problem and describe those numbers using variables. We may modify these equations algebraically to get solutions for the unknowable numbers by employing variables. As a result, issue solving is more effective and we can come up with generic answers that may be used in a variety of situations. Moreover, employing variables enables us to see patterns and trends as well as better grasp the connections between various amounts in a situation.

Given that,

Ryan sent 7 fewer messages than Martina.

R = M - 7

Keith sent 2 times as many messages as Martina.

K = 2M

Martina, Ryan, and Keith sent a total of 77 text messages.

M + R + K = 77

Substitute the value of equation 1 and 2 in equation 3:

M + (M - 7) + 2M = 77

4M - 7 = 77

4M = 84

M = 21

Substitute the value of M in equation 1 and equation2:

R = M - 7 = 21 - 7 = 14

K = 2M = 2(21) = 42

Hence, the number of messages are: Martina sent 21 messages, Ryan sent 14 messages, and Keith sent 42 messages.

Learn more about equations here:

https://brainly.com/question/1566730

#SPJ1

The multiple of the unit fraction 3/8​ is 15/40.

What is fraction ?

A fraction is a number that represents a part of a whole. It is a way of representing a quantity that is not a whole number. Fractions are written with two numbers, one above the other and separated by a horizontal line. The number above the line is called the numerator, and the number below the line is called the denominator.

To find the multiple of a fraction, you simply multiply the numerator and the denominator by the same number. For example, to find the multiple of 3/8, you can multiply both the numerator and the denominator by 2:

3/8 * 2/2 = 6/16

So the multiple of 3/8 by 2 is 6/16.

Similarly, you can find the multiple of 3/8 by any other number by multiplying both the numerator and denominator by that number. For instance, if you want to find the multiple of 3/8 by 5, you can multiply both the numerator and the denominator by 5:

3/8 * 5/5 = 15/40

Therefore, the multiple of the unit fraction 3/8​ is 15/40.

To know more about fractions visit :

https://brainly.com/question/78672

#SPJ1

Answer:

Step-by-step explanation:

Answer:

170 cm³

Step-by-step explanation:

V = πr²h

= 3.14 * (3)² * 6

= 3.14 * 9 * 6

= 169.56 cm³

= 170 cm³

Answer:

b

Step-by-step explanation:

3 + 3 = 6 lol

6 how many apples

By answering the above question, we may infer that Hence, the probability likelihood is 0.2752. (rounded to four decimal places).

Calculating the chance that an event will occur or a statement will be true is the subject of probability theory, a branch of mathematics. A risk is a number between 0 and 1, where 1 denotes certainty and a probability of about 0 denotes the likelihood that an event will occur. The likelihood that an event will take place is mathematically expressed as probability. Probabilities can also be expressed as percentages ranging from 0% to 100% or as integers between 0 and 1. the proportion of equally plausible possibilities that actually happen in relation to all possible outcomes when a certain event occurs.

We may utilize the complement of the CDF to respond to this query.

For x 0, the complement of the CDF is defined as 1 - F(x) = e(-x).

Thus, the likelihood that an old ICU patient will be there for more than five days is as follows:

[tex]1 - F(5) = e^(-0.3030 * 5) = 0.2052[/tex]

Hence, the likelihood is 0.2052. (rounded to four decimal places).

We may utilize the difference between the CDF at two distinct values to get an answer to this query.

The likelihood that an old ICU patient will be there for two to four days is as follows:

[tex]F(4) - F(2) = (1 - e^(-0.3030 * 4)) - (1 - e^(-0.3030 * 2)) = e^(-0.3030 * 2) - e^(-0.3030 * 4) = 0.2752[/tex]

Hence, the likelihood is 0.2752. (rounded to four decimal places).

To know more about probability visit:

https://brainly.com/question/11234923

#SPJ1

Answer: The equation of a circle with center (a,b) and radius r is given by:

(x - a)^2 + (y - b)^2 = r^2

In this case, the center is (9,10) and the point on the circle is (7,4). To find the radius, we can use the distance formula between the center and the point on the circle:

r = sqrt((7 - 9)^2 + (4 - 10)^2) = sqrt((-2)^2 + (-6)^2) = sqrt(40)

So, the equation of the circle is:

(x - 9)^2 + (y - 10)^2 = 40

Alternatively, we can also expand the equation to get:

x^2 - 18x + 81 + y^2 - 20y + 100 = 40

Simplifying and rearranging, we get:

x^2 + y^2 - 18x - 20y + 41 = 0

Therefore, the equation of the circle is either (x - 9)^2 + (y - 10)^2 = 40 or x^2 + y^2 - 18x - 20y + 41 = 0.

Step-by-step explanation:

The compound figure has a 41 square metre surface area.

The combined shapes of one or more simple polygons and circles make up the area of the composite shapes. We can add the areas of all the fundamental shapes together to determine the area of the composite shapes. Simply calculate the area of each individual form to obtain the area of composite shapes.

The compound figure's area can be calculated by breaking it up into smaller shapes and adding the areas of each one.

Then, divide the figure into two rectangles:

The first rectangle is 2 m by 9 m in size and has a surface area of 18 m².

The surface area of the second rectangle, which is 3 m by 7 m in size, is 21 m².

Next, we may determine the areas of the two triangles:

Due to its 2 m base and 2 m height, the first triangle has an area of 1/2 x 2 m x 2 m, = 2 m².

The second triangle has a base of 3 m and a height of 2 m, and its area is 1/2 x 3 m x 2 m = 3 m².

The two rectangles' overlap can then be subtracted:

The overlap is a rectangle that is 2 m by 3 m in size, or 6 m2, and measures 2 m by 3 m.

The total area of the compound figure is calculated by adding the areas of the two rectangles, the two triangles, and then deducting the overlap between the rectangles.

Total area is (18 m² + 21 m²) + (2 m² + 3 m²) - 6 m².

Total area: 41 m².

Hence, the compound has a 41 square metre size.

To know more about compound shapes, visit:

https://brainly.com/question/30681832

#SPJ1

The formula for the volume of a cone is:

V = (1/3)πr^2h

Solving for r:

V = (1/3)πr^2h

3V = πr^2h

r^2 = (3V)/(πh)

r = sqrt[(3V)/(πh)]

Given that V = 660cm^3, h = 14cm and π = 22/7:

r = sqrt[(3 × 660)/(22/7 × 14)] ≈ 7 cm

So the radius is approximately 7 cm.

To find the value of h:

V = (1/3)πr^2h

660 = (1/3)(22/7)(7^2)h

660 = (22/3)(49/7)h

660 = (22/3)(7)h

h = 660 / [(22/3)(7)]

h = 9.45 cm (rounded to two decimal places)

Therefore, the value of h when the volume of the cone is 660 cm^3 is approximately 9.45 cm.

21 is  the value of f(g(2)) in functions.

What is a function, exactly?

An expression, rule, or law in mathematics that specifies the relationship between an independent variable and a dependent variable (the dependent variable). Mathematics is rife with functions , and the sciences depend on them for constructing physical relationships.

f(x) = 2x² + x - 13

g(x) = x - 6

the value of f(g(2))

   g(2) = 2 - 6

          = -4

   f(g(2)) =  2x² + x - 13

               = 2(-4)² + 2 - 13

              = 32 - 11

               = 21

Learn more about function

brainly.com/question/12431044

#SPJ9

Measure of angle B is 40 degree

A circle is a closed two-dimensional figure in which the set of all the points in the plane is equidistant from a given point called “centre”. Every line that passes through the circle forms the line of reflection symmetry. Also, it has rotational symmetry around the centre for every angle.

From the figure,

As △ABC is inscribed in the circle, the points  A , B and C   lie on the circumference of the circle .

As  O  is the center of the circle.

Given , angle (BAC) is 50 degree

We know, a triangle drawn from two ends of a diameter of a circle makes an angle of 90° at the circumference.

so, angle (ACB) is 90 degree

Now, in triangle ABC

[tex]\angle ABC +\angle BCA +\angle BAC =180^0\\[/tex]

[tex]\angle B + 90^0 +50^0 = 180^0\\[/tex]

[tex]\angle B =40^0[/tex]

Hence, [tex]\angle B = 40^0[/tex]

To learn more about the circle here:

https://brainly.com/question/10005646

#SPJ1

answer is 14.

4-(2*-5)

4-(-10)

=4+10

=14.

Answer:

Step-by-step explanation:

[tex]\tt 4-2(-5)[/tex]

Follow the PEMDAS order of operations:-

P: Parentheses

E: Exponents

M: Multiplication

D: Division

A: Addition

S: Subtraction

1) Multiply and/ or divide:-

[tex]\tt 4 -\left(-10\right)[/tex]

2) Addition/Subtraction:-

_____________________

Hope this helps! :)

Answer: The first box in the model is 60. The box above it is 300. The box above 20 is 70. The answer is 74.

Step-by-step explanation: Self-explanatory.

The function that is non-linear is function D.

A function is linear if its graph is represented by a straight line, and that line is usually written as:

ax + by = c

Where x is the horizontal variable and y the vertical variable.

For example, here we can see that A, B, and C are represented by straight lines, thus, these are linear functions.

But if you look at graph D, you can see that it is not linear, it's shape is like an "M", so that is the non-linear function.

The correct option is D.

Learn more about linear functions at:

https://brainly.com/question/4025726

#SPJ1

The probability of getting sum of 6 is C)5/36.

What is probability?

Probability is a way of calculating how likely something is to happen. It is difficult to provide a complete prediction for many events. Using it, we can only forecast the probability, or likelihood, of an event occurring. The probability might be between 0 and 1, where 0 denotes an impossibility and 1 denotes a certainty.

We know that,

Probability of event = number of favorable outcome/ Total outcome

When a 6 sided dice die twice then

Total number of outcome = 6*6=36

Favorable outcome is a sum of 6, Ways of obtaining a sum of 6

(1,5), (5,1), (2,4),(4,2) and (3,3). Thus, there are 5 ways in which 6 can be obtained using  rolling dice twice, Then

=> P(sum of 6 )=5/36

Hence the correct option is C)5/36.

To learn more about probability refer the below link

https://brainly.com/question/13604758

#SPJ1

There is a 2.28% chance that more than 250 books were borrowed in a week.

Probability can also be calculated using other methods, such as counting techniques and probability distributions. Probability distributions provide a way to model the behavior of random events and describe the likelihood of different outcomes occurring.

Probability has many applications in fields such as statistics, finance, engineering, and science. It is used to make predictions, analyze data, and make decisions based on uncertain information. Understanding probability is an important skill for many professions, as it allows individuals to make informed decisions and assess risk.

To solve this problem, we need to use the standard normal distribution and calculate the z-score.

First, we find the z-score:

z = (x - μ) / σ

z = (250 - 190) / 30

z = 2

We can then use a standard normal distribution table or calculator to find the probability of getting a z-score of 2 or higher.

Using a standard normal distribution table, we find that the probability of getting a z-score of 2 or higher is approximately 0.0228.

To convert this to a percentage, we multiply by 100:

0.0228 x 100 = 2.28%

Therefore, there is a 2.28% chance that more than 250 books were borrowed in a week.

To know more about distribution visit:

https://brainly.com/question/29509087

#SPJ1

The complete question is:

The number of books borrowed from a library each week follows a normal distribution. When a sample is taken for several weeks, the mean is found to be 190 and the standard deviation is 30. There is a % chance that more than 250 books were borrowed in a week.

Answer:

50 % possibility or 1/2 chance

Step-by-step explanation:

2, 4, 6, 8, 10, 12, and 14 are all even and there are seven of them

Therefore, the area of triangle XYZ is (1/2)bh = (1/2)(15)(15√3) = 225√3. Therefore, the area of triangle XYZ is 225√3.

Triangle is a three-sided polygon that has three angles and three sides. It is one of the basic shapes in geometry and is a very important concept in mathematics. It is also used in various fields, such as physics and engineering. Triangles can be classified into different types, such as right triangles, isosceles triangles, acute triangles, obtuse triangles, and equilateral triangles. Triangles are also used to form polygons, such as quadrilaterals, pentagons, and hexagons.

To find the area of triangle XYZ, we must first calculate the length of each side of triangle XYZ. The length of each side can be determined by multiplying the length of each side of triangle ABC by five.

Since all three sides of triangle ABC are equal in length, then each side of triangle XYZ will be 5 times the length of triangle ABC. Therefore, the length of each side of triangle XYZ is 5 times the side length of triangle ABC, or 15.

The area of the triangle can be calculated using the Triangle Area formula, A = (1/2)bh, where b is the base of the triangle and h is the height of the triangle. Since we know the length of each side of triangle XYZ, we can use these values to calculate the base and height of the triangle. The base of the triangle is 15, and the height of the triangle is 15√3.

Therefore, the area of triangle XYZ is (1/2)bh = (1/2)(15)(15√3) = 225√3. Therefore, the area of triangle XYZ is 225√3.

To know more about triangle click-
https://brainly.com/question/17335144
#SPJ1

Answer:

Step-by-step explanation:

a. Variables:

D0 = Demand for nurses in 2000 = 2,000,000

S0 = Supply of nurses in 2000 = 1,890,000

D2020 = Projected demand for nurses in 2020 = 2,810,414

S2020 = Projected supply of nurses in 2020 = 2,001,998

Equations:

For 2000: D0 = S0

For 2020: D2020 = S2020

b. Using substitution, we can set the two equations equal to each other:

D0 = S0

2,000,000 = 1,890,000 + m(S0 - 1,890,000) (where m is the rate of increase in supply)

m = 0.063

Now we can use this value of m to find out during which year the supply of nurses was equal to the demand:

2,000,000 = 1,890,000 + 0.063(S - 1,890,000)

S = 2,013,008

Therefore, the supply of nurses was equal to the demand in the year 2013.

The distance between the media center and the office is 4 times 100, or 400 feet.

Distance Formula. ⇒ [tex]d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}[/tex] Using this formula in the equation, we get

Using the distance formula, we can find the distance between the media center and the office:

[tex]d = \sqrt{((x2 - x1)^2 + (y2 - y1)^2)}[/tex]

where (x1, y1) are the coordinates of the media center (-20, 22) and (x2, y2) are the coordinates of the office (-20, 18).

[tex]d = \sqrt{((-20 - (-20))^2 + (18 - 22)^2)}\\= \sqrt{(0 + (-4)^2)}\\= \sqrt{(16)}\\= 4[/tex]

Since one unit on the coordinate plane represents 100 feet.

Hence, the distance between the media center and the office is 4 times 100, or 400 feet.

To learn more about distance formula, Visit

https://brainly.com/question/661229

#SPJ1

A linear equation in the form p = mn + b that gives the price they can charge for n shirts is p = -0.003x + 22.

In Mathematics, the point-slope form of a straight line can be calculated by using this mathematical expression:

y - y₁ = m(x - x₁) or y - y₁ = (y₂ - y₁)/(x₂ - x₁)(x - x₁)

Where:

At data point (1000, 19), a linear function in standard form for this line can be calculated by using the point-slope form as follows:

y - y₁ = (y₂ - y₁)/(x₂ - x₁)(x - x₁)

y - 19 = (16 - 19)/(2000 - 1000)(x - 1,000)

y - 19 = -0.003(x - 1,000)

y = -0.003x + 3 + 19

p = y = -0.003x + 22

Read more on slope here: brainly.com/question/23086745

#SPJ1

1. Patrick makes more per hour by $6.

2. Betthany makes more per hour by $5.25

3. Tommy makes more per hour by $ 1.25.

A line's slope is determined by how its y coordinate changes in relation to how its x coordinate changes. y and x are the net changes in the y and x coordinates, respectively. Therefore, it is possible to write the

change in y coordinate with respect to the change in x coordinate as,

m = Δy/Δx where, m is the slope

The rate of Change of Critters and Co

Slope= Rise/ Run

        = 15/2

        = 7.5

So, the equation is y = 7.5x

and, rate of Change of Little Paws

= (52.50-35) / (6-4)

= 17.5 / 2

= 8.75

So, the equation is y = 8.5x + 5

and, rate of Change of The Waging Tail

= 8.25

1. Patrick makes more per hour by $6.

2. Betthany makes more per hour by $5.25

3. Tommy makes more per hour by $ 1.25.

Learn more about Slope here:

https://brainly.com/question/3605446

#SPJ1

Answer:

x = 5 + [tex]\sqrt{7}[/tex]

x = 5 - [tex]\sqrt{7}[/tex]

Step-by-step explanation:

The given quadratic equation is:

x^2 - 10x + 18 = 0

We can solve this equation using the quadratic formula, which states that for a quadratic equation of the form ax^2 + bx + c = 0, the solutions for x are given by:

x = (-b ± sqrt(b^2 - 4ac)) / 2a

In this case, a = 1, b = -10, and c = 18. Substituting these values into the quadratic formula, we get:

x = (-(-10) ± sqrt((-10)^2 - 4(1)(18))) / 2(1)

Simplifying the expression inside the square root, we get:

x = (10 ± sqrt(100 - 72)) / 2

x = (10 ± sqrt(28)) / 2

x = (10 ± 2sqrt(7)) / 2

Simplifying further, we get:

x = 5 ± [tex]\sqrt{7}[/tex]

The result is not reasonably close to the value of 3/4 i.e. 0.75.

Probability is a number that expresses the likelihood or chance that a specific event will take place. Both proportions ranging from 0 to 1 and percentages ranging from 0% to 100% can be used to describe probabilities.

The probability of getting a green pea can be estimated by dividing the number of green peas by the total number of peas:

probability of green pea = number of green peas / total number of peas

In this case, the number of green peas is 439 and the total number of peas is the sum of the green and yellow peas, which is:

total number of peas = number of green peas + number of yellow peas

= 439 + 30 = 469

Therefore, the probability of getting a green pea is:

probability of green pea = 439 / 469 ≈ 0.935 or 93.5%

So, the estimated probability of getting an offspring pea that is green is approximately 93.5%.

The result is not reasonably close to the value of 3/4 i.e. 0.75.

Learn more about probability here:

https://brainly.com/question/30034780

#SPJ1

Answer:

Below

Step-by-step explanation:

.385 liters =  385 milliliters  

   SIX of these would be   385 ml * 6 = 2310 ml

The principal will need to order 108 pizzas to feed 300 students.

We may set up a proportion to determine how many pizzas are required to feed 300 students if 9 pizzas feed 25 students:

25 pupils × 9 pizzas = x pizzas / 300 students

where x is how many pizzas are required to feed 300 kids.

We can cross-multiply and simplify to find x's value:

300 kids times 9 pizzas equals 25 students (x pizzas)

2700 = 25x

x = 2700 / 25

x = 108

In order to serve 300 pupils, the principal will have to order 108 pizzas.

To know more similar question visit:

https://brainly.com/question/1867024

#SPJ1

Answer:

A′(−3, 4.5), B′(−1.5, 1.5), C′(3, −1.5), D′(3, 3)

Step-by-step explanation:

You would take three fourths of each coordinate to get the x and y values.

Answer:

A′(−3, 4.5), B′(−1.5, 1.5), C′(3, −1.5), D′(3, 3)

Step-by-step explanation:

You would take three fourths of each coordinate to get the x and y values.

Therefore, when w = 1/2, the expression w + 1/2w + 2 evaluates to 17/4.

You must replace each variable with a number and carry out the arithmetic procedures to evaluate an algebraic expression. Variable x in the preceding example is equivalent to 6, as 6 + 6 = 12. We can substitute our variables with their values before evaluating the expression if we are aware of their values.

To evaluate the expression for w = 1/2, we substitute w = 1/2 into the expression:

w + 1/2w + 2

= 1/2 + 1/2(1/2) + 2 (substitute w = 1/2)

= 1/2 + 1/4 + 2 (simplify multiplication)

= 9/4 + 2 (convert 1/2 to 2/4 and add fractions)

= 17/4 (add fractions)

Therefore, when w = 1/2, the expression w + 1/2w + 2 evaluates to 17/4.

To know more about expression visit:

https://brainly.com/question/28873131

#SPJ1