Solve for r
-2r+15=-3(-2r-7)-6

On solving the provided question, we got that The 90% confidence interval for the population mean mu is (140.4, 147.6)

A measure of how far the data are from the mean is called standard deviation (or). Data that have a low standard deviation are more likely to be centered around the mean than those that have a high standard deviation.

xbar = 144 (sample mean)

s = 12 (sample standard deviation)

n = 30 (sample size)

z = 1.645 (critical value at 90% confidence; use a calculator or table to compute this value)

[tex]The lower limit of the confidence interval is L, which is found by\\\\L = xbar - z(s/sqrt(n))\\L = 144 - 1.645(12/sqrt(30))\\L = 140.395985571616\\L = 140.4\\[/tex]

Similarly the upper limit U is

U = xbar + z(s/sqrt(n))

U = 144 + 1.645(12/sqrt(30))

U = 147.604014428384

U = 147.6

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Answer:

Step-by-step explanation:

=(37 * 45 ) + (63 * 45 )

=1665 + 2835

=4500

Answer:

Step-by-step explanation:

[tex]\tt 37\times 45\times63\times45[/tex]

[tex]\tt 1665\times63\times45[/tex]

[tex]\tt 104895\times 45[/tex]

[tex]\tt 4720275[/tex]

____________________

Hope this helps you!

Have a great day! :)

The  number of trucks and cars need by the class for the trip will be 3 and 2 respectively

Information from the question is used as follows

There are 22 people going on this trip.

total number = 22

There are four drivers and two types of vehicles, cars and trucks

drivers = 4

vehicle types = 2

The cars set four people, including the driver and the truck seats six people again including drive

cars = 4 people

truck = 6 people

Total number of people + drivers = 26

let the number of people in the truck be t and the number of people in the car be c

6t + 4c = 26

assuming the trucks were 3

6 * 3 + 4c = 26

4c = 26 - 18

4c = 8

c = 2

The class will need 3 trucks and 2 cars

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Answer:

0.004

Step-by-step explanation:

Hope it helps!

Answer:

in 40 minutes ... travelled 50km

Step-by-step explanation:

Answer: The square root of 169 is 13, so the two solutions for x are:

x = (13 + 13) / 4 = 3.25

x = (13 - 13) / 4 = -0.25

Since the quadratic expression 2x^2 - 13x - 5 equals 0 when x is either 3.25 or -0.25, the factors of this expression are (x - 3.25)(x + 0.25).

In summary, the factors of the first quadratic expression are (x + 1.056)(x + 5.937), the factors of the second expression are (x - 0.75)(x + 3.75), and the factors of the third expression are (x - 3.25)(x + 0.25).

Step-by-step explanation: To find the factors of a quadratic expression, we can use the quadratic formula. The quadratic formula states that for a quadratic expression of the form ax^2 + bx + c = 0, the solutions for x are given by the formula x = (-b ± sqrt(b^2 - 4ac)) / (2a).

In the first equation, a is 9, b is 31, and c is 20. Plugging these values into the quadratic formula, we get:

x = (-31 ± sqrt(31^2 - 4 * 9 * 20)) / (2 * 9)

This simplifies to:

x = (-31 ± sqrt(961 - 720)) / 18

This further simplifies to:

x = (-31 ± sqrt(241)) / 18

We can find the value of the square root by using a calculator or by remembering some common square roots. The square root of 241 is approximately 15.937, so the two solutions for x are:

x = (-31 + 15.937) / 18 = -1.056

x = (-31 - 15.937) / 18 = -5.937

Since the quadratic expression 9x^2 + 31x + 20 equals 0 when x is either -1.056 or -5.937, the factors of this expression are (x + 1.056)(x + 5.937).

We can use the same approach to find the factors of the other two quadratic expressions. For the second expression 2x^2 + 7x - 4, the values of a, b, and c are 2, 7, and -4, respectively. Plugging these values into the quadratic formula, we get:

x = (-7 ± sqrt(7^2 - 4 * 2 * -4)) / (2 * 2)

This simplifies to:

x = (-7 ± sqrt(49 + 32)) / 4

This further simplifies to:

x = (-7 ± sqrt(81)) / 4

The square root of 81 is 9, so the two solutions for x are:

x = (-7 + 9) / 4 = 0.75

x = (-7 - 9) / 4 = -3.75

Since the quadratic expression 2x^2 + 7x - 4 equals 0 when x is either 0.75 or -3.75, the factors of this expression are (x - 0.75)(x + 3.75).

For the third expression 2x^2 - 13x - 5, the values of a, b, and c are 2, -13, and -5, respectively. Plugging these values into the quadratic formula, we get:

x = (13 ± sqrt(13^2 - 4 * 2 * -5)) / (2 * 2)

This simplifies to:

x = (13 ± sqrt(169 + 40)) / 4

``

Answer:

5 groups

Step-by-step explanation:

10/2=5

It will be 38 feet long

The perimeter is the space surrounding a shape's edge.

The sum of the lengths of all the sides in a rectangular shape is its perimeter. P = 2( L+B)

Given that a rectangle's width is 17 feet and its perimeter is 110 feet, the length will be P = 2 (L + B)

110 = 2 (L + 17)

55 - 17 = L.

The pool is therefore 38 feet long.

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Answer: 1

Step-by-step explanation:

Answer: To estimate the company's sales in 2026, we need to find the average increase in sales per year and then use that to predict the sales for 2026.

The total increase in sales from 2017 to 2020 was $14.5 million - $9 million = $<<14.5-9=5.5>>5.5 million.

The number of years from 2017 to 2020 is 2020 - 2017 = <<2020-2017=3>>3 years.

Therefore, the average increase in sales per year was $5.5 million / 3 years = $<<5.5/3=1.83>>1.83 million/year.

Since the average increase in sales per year was $1.83 million/year, we can estimate the sales in 2026 by adding that amount to the sales for each year from 2020 to 2026. For example, the estimated sales for 2021 would be $14.5 million + $1.83 million = $16.33 million. Similarly, the estimated sales for 2022 would be $16.33 million + $1.83 million = $18.16 million, and so on.

Using this method, we can estimate that the sales for 2026 will be $26.73 million.

The relation represents y as a function of x as for each value of x there is a unique value of y.

A function y = f(x) is defined as a one to one relation between sets X and Y. The set X is called the domain while Y is called the range of f(x).

The given data is as follows,

A relation contains the points (1,2),(2,-1),(3,0),(4,1), and (5,-1).

Here x is the element of domain and y is of the range of the given relation.

Here, the values of y are distinct for different values of x.

Hence, the given relation represents y as a function of x  because for each value of x there is a single value of y.

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Half a mile every hour is equal to 1/5 mile every 4/10th of an hour.

Area is the total amount of space that an object's shape or a flat (2-D) surface occupy.

Create a square on paper by using a pencil. Two dimensions make it up. A shape's area on paper is the space it takes up.

Imagine that your square is made up of smaller unit squares.

The area of a figure is equal to the number of unit squares required to completely cover the surface area of a particular 2-D shape. Square cms, square feet, square inches, square meters, etc. are a few common units for measuring area.

To get the area of the square figures presented below, draw unit squares with 1-centimeter sides. Therefore, the shape will be measured.

According to our question-

(1/5) / (4/10) = x / 1

Cross-multiplication yielding

1/5 * 1 = 4/10 * x

How to find x?

10 / 20 = x

x = 1 / 2

Half a mile every hour is equal to 1/5 mile every 4/10th of an hour.

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Answer:

x = 4

Step-by-step explanation:

5 x .8 = 4

Answer: the value of x is 4

Step-by-step explanation:

x=5*0.8=4

The value of the equation log(3 47) is about 4.235.

The power to which a number must be increased in order to obtain another number is known as a logarithm. For instance, since ten raised to the power of two equals 100, the base ten logarithm of 100 is 2: log 100 = 2.

Given that the approximate values of log(3) and log(47) are 1.1 and 3.85, respectively,

we must determine the approximate value of log(347).

log(a × b) = log(a) × log(b)

we get ,

log(3 × 47) = log(3) × log(47)

substituting , the values of log(3) and log(47) ,

we get ,

log(3 × 47) = 1.1 × 3.85

≈ 4.235

Therefore , The approximate value of log(3 × 47) is 4.235   .

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The option that is not a benefit of stretching is 1. Poor circulation

The option that is not in upper body stretch is 3. Straddle stretch

The benefits include:

The straddle stretch is one that is not considered an upper body stretch. Straddle stretch, also known as the middle split, requires a lot of leg flexibility. In conclusion, the correct option is C.

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Answer: B

Step-by-step explanation:

Range will always be Y

Domain will always be X

Answer:

1. no solution

2. one solution

3. infinitely many solutions

4. one solution

Step-by-step explanation:

1. same slope, different intercepts, parallel lines, no solution

2. different slopes, lines intersect at 1 point, one solution

3. same equation, infinitely many solutions

4. different slopes, lines intersect at 1 point, one solution

Out of the 14 coins she has, she will have 4 dimes, totaling $2.5.

Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement. It's possible to multiply, divide, add, or subtract with this mathematical operation. An expression in mathematics is made up of numbers, variables, and functions (such as addition, subtraction, multiplication or division etc.) You can think of expressions as being comparable to phrases. A phrase in language may contain an action on its own, but it does not constitute a whole sentence.

Here,

Let n be the nickels, d be the dimes, q be the quarters.

Total coins=14

Total amount=$2.5

n=2d

d=2q

q=d/2

d+q+n=14

d+2d+d/2=14

2d+4d+d=28

7d=28

d=4

She will have 4 dimes out of 14 coins that she owns with an amount of $2.5.

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The depth of the water is 5.3 meters

The dolphin jumps to a height of 4.5 over the water's surface, and her companion swims 9.8 straight beneath her, according to the story.

We will take the position of the dolphin's friend and subtract it from the dolphin's position to determine the location of the dolphin's friend with respect to the water's surface.

-5.3 denotes the depth of the water.

As a result, the friend of the dolphin is located 5.3 meters below the water's surface.

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Answer:

[tex]7\sqrt5[/tex]

Step-by-step explanation:

245 ÷ 5 = 49

49 is a square number (7)

So you put 7 on the outside and 5 on the inside.

A graph of the given system of equations f(x) = 2x² - 8x + 3 and g(x) = -2x + 3 is shown in the image attached below.

The points that make both equations true is (0, 3)

In Mathematics, a graph can be defined as a type of chart that is typically used to graphically represent data points or ordered pairs on both the horizontal and vertical lines of a cartesian coordinate, which are the x-coordinate and y-coordinate respectively.

In Mathematics, the graph of every quadratic equations (functions) is either an upward or downward parabola, which is typically a u-shaped curve. This ultimately implies that, the graph of a quadratic equation (function) would always form a parabolic curve.

Based on the graph (see attachment), we can logically deduce that the solution to the given system of equations is the point of intersection of the lines on the graph representing each, which is the ordered pair (0, 3);

f(x) = 2x² - 8x + 3

3 = 2(0)² - 8(0) + 3

3 = 3 (True).

g(x) = -2x + 3

3 = -2(0) + 3

3 = 3 (True).

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Answer: I = $ 200.00

Step-by-step explanation:

I = Prt

Convert R (percent) to r (decimal)

r = R/100 = 1%/100 = 0.01 per year

I = 2000 × 0.01 × 10 = 200

I = $ 200.00

hope this helps!

The height of the flagpole, found using the ratio of the sides of similar triangles is 12.975 meters

Similar triangles are triangles  in which two angles of one triangle  are congruent to two angles in the other triangle, such that they have the same shape.

The parameters that can be used to find the height of the flagpole are;

Distance of the mirror from the flagpole = 8.65 meters

Distance of Feng on the other side of the flagpole = 1.1 meters

The height from Feng's eyes to the ground = 1.65 meters

According to the law of reflection, the angle of incident and the angle of reflection are the same

The angle made by Feng and the ground = Angle made by the flagpole and the ground = 90°

The triangle formed by the Feng and the flagpole are therefore similar by AA similarity postulate

The ratio of corresponding sides of similar triangles are the same, therefore;

[tex]\dfrac{1.65}{Height\, of \, the \, flagpole} = \dfrac{1.1}{8.65}[/tex]

[tex]Height\, of \, the \, flagpole = \dfrac{1.65}{1.1} \times 8.65 = 12.975[/tex]

Height of the flagpole = 12.975  meters

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The LORD is faithful to all generations, and His loving kindness endures forever.

God Is Love, Therefore God Is Good God is light, and He is also love. God "is love." Because God loved the world so much that he gave his one and only Son, he ensured that everyone who trusted in him would not perish but have eternal life.

In the church, the adage "God is good, all the time, all the time" gained popularity a number of years ago. It is still in use today and was once used as a welcome and a response, frequently in a call-and-response pattern.

The Oxford English Dictionary describes omnibenevolence as unlimited or infinite compassion.

The complete question is,

Why is God so merciful all the time?

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Lela is making peach pies. She uses 9 peaches for each pie. If she uses 18 peaches for 2 pies and 36 peaches for 4 pies, how many peaches will she need for 7 pies?

As, Lela is using 9 peaches for each pie.

Thus, she used 18 peaches for 2 pies, which is 2 times 9 and 36 peaches for 4 pies, which is 4 times 9. Therefore, to make 7 pies, she would need :

Peaches used for one pie = 9

=> Peaches used for 7 pies = 9 × 7

=> Peaches needed for 7 pies = 63

Hence, she will need 63 peaches to make 7 pies.