A paddleboat can move at a speed of 14 kilometers per hour in still water. The boat is paddled 10 kilometers downstream in a river in the same time it takes to go 5 kilometers upstream. What is the speed of the river? Round your answer to the nearest tenth.

Answer:

x = 1.5°

Step-by-step explanation:

8 days = 12°

1 day = x

cross-multiply

8x = 12

Divide both sides by the coefficient of x, which is 8

8x/8 = 12/8

x = 1.5°

Hence, 1 day = 1.5°

Answer:

= 4.875 × 105

(scientific notation)

= 4.875e5

(scientific e notation)

= 487.5 × 103

(engineering notation)

(thousand; prefix kilo- (k))

A is the equation representing proportional relationship .

Relationships between two variables that are proportional occur when their ratios are equal. Another way to consider them is that in a proportionate relationship, one variable is consistently equal to the other's constant value. The "constant of proportionality" is the name of this constant.

If the y intercept is anything but 0, then the linear function is not proportional. So C is not proportional (2 is the y intercept)

B is a quadratic and it will not give proportional results. y/x is not a constant.

D has no x value and is not going to give a proportional result. y/x is undefined.

learn more about proportional relationship here :

brainly.com/question/12917806

#SPJ13

To find the new coordinates, we just have to use the given rule

Let's apply it to each vertex

A Point-Slope equation of a straight line models this scenario: y -50,000 = -3,000(x -10).

The equation of the straight line has its slope and given point.

If we have a non-vertical line that passes through any point(x1, y1) has gradient m. then general point (x, y) must satisfy the equation

y-y₁ = m(x-x₁)

We can recognize any points of the graph.

(0,80000) ; (10,50000)

Given that;

y -50,000 =______(x -10)

We need to find the slope.

Slope = Change in y / Change in x

Slope = 80,000 - 50,000 / 0 - 10 = 30,000 / -10

= -3,000

The slope is equal to -3000 that is Choice A; y -50,000 = -3,000(x -10)

Learn more about slope here:

https://brainly.com/question/2503591

#SPJ1

The complete question is;

The newspaper in Haventown had a circulation of 80,000 papers in the year 2000. In 2010, the circulation was 50,000. With x = 0 representing the year 2000, the graph below models this scenario.

The diameter of the Sun that she needs to draw, considering the scale, is of:

2.15 m.

The meaning of the scale of a drawing is how much each unit in the drawing represents in actual distance.

In this problem, the actual diameters are given as follows:

The drawn diameters are given as follows:

From the scale of the earth, the number of km represented with each cm is given as follows:

13000/2 = 6500 km represented by each cm.

(division of the actual distance by the scale).

Hence the number of cm that is needed to represent 1,400,000 km is of:

1400000/6500 = 215 cm.

(division of the total distance by the scale).

Each cm is composed by 100, the diameter of the Sun in meters is of:

215/100 = 2.15 m.

Learn more about scales at brainly.com/question/13036238

#SPJ1

The values of c and d that would make that the given expression represent a real number are c = –3, d = –2.

For the given question;

The expression is given as;

= i(2 + 3i)(c + di)

Simplify the expression;

= i(2c + 2di + 3ci + 3di²)

= 2ci + 2di² + 2ci² + 3di³

= (2c - 3d)i - 2d - 3c

In order is for expression to yield a real number, the coefficient of must now be zero.

Check the values from option;

2c - 3d = 2 x 2 - 3x 3 = -5

2c - 3d = 2 x -2 - 3 x -3 = -13

2c - 3d = 2 x 3 + 3 x -2 = -1

2c - 3d = 2 x -3 -3 x - 2 = 0

Thus, the correct values for the expression to becomes real number is

c = –3, d = –2.

To know more about the real number, here

https://brainly.com/question/17201233

#SPJ1

Answer:

the sum of an even whole number and odd whole number is always odd ,

True

Answer:

Step-by-step explanation:

This is a sketch graph of y= sin x° for 0 ≤ x ≤360.

It is called as Sine curve. A mathematical curve described in terms of the sine trigonometric function, of which it is the graph, is known as a sine wave, sinusoidal wave, or simply sinusoid. It is a smooth periodic function and a particular kind of continuous wave.

To know more about Sine curve.

https://brainly.com/question/26858793

Remember that

The data set is a function if every element of the domain corresponds to exactly one element of the range

so

Verify each option

I ------> is a function (every element of the domain corresponds to exactly one element of the range)

II -----> is not a function (every element of the domain does not correspond to exactly one element of the range)

III ---> is a function (every element of the domain corresponds to exactly one element of the range)

IV ----> is not a function (every element of the domain does not correspond to exactly one element of the range)

therefore

The answer is

Given:

Surveyed Sample = 500 students

Number of students who listen to music = 300

The probability of students that listens to music is given by the formula:

In a sample of 1500 students, to find the probable number of students that will listen to music

we will multiply the probability we obtained initially by the sample space

=>

It is likely that 900 students will listen to music while studying

As we Know that, ΔTUV[tex]\sim[/tex] ΔXWV

So, for the given proportion TV(y) = 21.

What is Proportion?

A proportion is an equation that sets two ratios at the same value. For instance, you could express the ratio as follows: 1: 3 if there is 1 boy and 3 girls (for every one boy there are 3 girls) There are 1 in 4 boys and 3 in 4 girls. 0.25 are male (by dividing 1 by 4)

What is Ratio?

The link between two or more things in terms of quantity, amount, or size.

Given that,

ΔTUV[tex]\sim[/tex] ΔXWV

∠T = ∠X

∠U = ∠W

∠TUV = ∠XWV

So, TU/WX = TV/WV

10/10 = TV/21

1 = TV/21

TV = 21

So, for the given proportion the value for the side TV(y) = 21

Learn more about Proportion click on this:

https://brainly.com/question/28777033

#SPJ1

The formula for calculating the amount of money after compounding for a period of time is expressed as;

A = P(1+r/n)^nt

P is the principal (amount deposited)

r is the rate

t is the time

n is the time of compounding

Given

P = 200.00

r = 9% = 0.09

t = 2 years

n = 1 year

Substitute the given parameters into the formula

A = 200(1+0.09/1)^1(2)

A = 200(1.09)^2

A = 200(1.1881)

A = 237.62

Hence he will be able to spend 237.62 on the bike

67 is a prime number and 1 is neither prime nor composite number.

What is prime number and composite number?

A prime number is a number which has exactly two factors i.e. '1' and the number itself. A composite number has more than two factors, which means apart from getting divided by 1 and the number itself, it can also be divided by at least one positive integer.

The given two numbers are 1 and 67.

Since, the prime numbers from 1 to 100 are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97.

67 has exactly two factors i.e. 1 and the number 67 itself.

Therefore, 67 is a prime number.

Due to the fact that it only has one factor, 1, number is not a prime.

Hence, 67 is a prime number and 1 is neither prime number nor composite number.

To know more about prime number and composite number,  click on the link

https://brainly.com/question/111476

#SPJ1

The number of advance and same day tickets sold are 25 and 35 respectively.

let

x + y = 65

25x + 30y = 1800

From (1)

x = 65 - y

Substitute x = 65 - y into (2)

25x + 30y = 1800

25(65 - y) + 30y = 1800

1625 - 25y + 30y = 1800

5y = 1800 - 1625

5y = 175

y = 175/5

y = 35

Substitute y = 35 into (1)

x + y = 65

x + 35 = 65

x = 65 - 35

x = 25

Therefore, Simultaneous equation is used to determine the number of advance and same day tickets sold.

25 advance tickets and 35 same day tickets were sold.

Read more on simultaneous equation:

https://brainly.com/question/16863577

#SPJ1

the initial expression is:

so to rest them we want to have the same radical so we can rewrite the root of 20 so:

The length of each piece of wire is 2.5 inches.

Fractions are used to depict the components of a whole or group of items. Two components make up a fraction. The numerator is the number that appears at the top of the line. It specifies how many identically sized pieces of the entire event or collection were collected. The denominator is the quantity listed below the line. The total number of identical objects in a collection or the total number of equal sections that the whole is divided into are both displayed. A fraction can be expressed in one of three different ways: as a fraction, a percentage, or a decimal. The first and most popular way to express a fraction is in the form of the letter ab. Here, a and b are referred to as the numerator and denominator, respectively.

Let the number of pieces = x

The length of the wire = 5/8 inches

The length of one piece of wire = 1/4 inch

According to the question,

1/4 x = 5/8

So, x = 5/8 × 4

x = 20/ 8

x = 5/2

x = 2.5 inch

To know more about fractions, visit:

brainly.com/question/11131783

#SPJ1

Answer: I am pretty sure that the answer is flipping a coin twice and recording the result

Step-by-step explanation: my reasoning is you can compare the results unlike the rest

The slope-intercept form of the equation of a straight line is given to be:

where m is the slope and b is the intercept on the y-axis.

The slope is calculated using two points on the line by the formula:

Therefore, for this line, the slope will be:

Therefore, this value for the slope is substituted back into the equation for the line:

At the point (6, 0), we can calculate the value of b to be:

Therefore, the equation is:

The difference between the two investments after 35yrs is $4700 and  Bank of America is offering higher interest than 5/3rd banks.

Most interest is compounded semiannually, quarterly, or monthly. Continuous compounding assumes that interest is compounded indefinitely and reentered on the balance sheet. The continuous compounding formula takes into account four variables.

For the given question,

5/3rd bank offers continuous interest:

For continuous interest, A = P[tex]e^{rt}[/tex]

where,

P = the initial amount

A = the final amount

r = the rate of interest

t = time

e is a mathematical constant where e ≈ 2.7183.

A = 10000 × [tex]2.71^{0.042*35}[/tex]

A =  10000 × 4.04

A = $40400 approximately

Interest = Amount - Principle

Interest = 40400 - 10,000

Interest = $30400

Bank of America offers compound interest:

For compound interest:

[tex]A = P(1 + \frac{r}{n})^{nt}[/tex]

A = 10000 × 4.51

A = $45100

Interest = Amount - Principle

Interest = 45100 - 10,000

Interest = $35100

The above calculation explains Bank of America is offering higher interest than 5/3rd bank by $35100 - $30400 = $4700

To know more about compound interest and continuous interest visit:

https://brainly.com/question/17185294

#SPJ4

The given statement expression is equivalent to -2 [tex]\frac{1}{10}[/tex].

A mathematical expression is made up of terms (constants and variables) separated by mathematical operators. A mathematical equation is used to equate two expressions. Equation modelling is the process of writing a mathematical verbal expression in the form of a mathematical expression for correct analysis, observations and results of the given problem. In mathematics, a complex number is an element of a number system that extends the real numbers with a specific element denoted [i], called the imaginary unit and satisfying the equation -

[tex]{\displaystyle i^{2}=-1}[/tex]

Every complex number can be expressed in the form a + bi, where [a] and [b] are real numbers

We have the following statement -

3 and one-tenth times negative 6 times seven-twelfths

We can write -

3 (1/10 x - 6) × 7/12

- 3 [tex]\frac{3}{5}[/tex] × 7/12

-18/5 × 7/12

-3/5 x 7/2

- 21/10

- 2 [tex]\frac{1}{10}[/tex]

Therefore, the given statement expression is equivalent to -2 [tex]\frac{1}{10}[/tex].

To solve more questions on Equations, Equation Modelling and Expressions visit the link below -

brainly.com/question/14441381

#SPJ1

What percent of 120 is 180

we know that

120 represent the 100%

so

Applying proportion

100/120=x/180

solve for x

x=(100/120)*180

x=150%

The linear equations of the graph are y = 2/3x + 1. Option D.

Solution:

Let's find the slope of the graph using the coordinates (0, 1) (-3, -1)

m = y₂ - y₁ / x₂ - x₁

m = -1 - 1  / -3 - 0

m = -2/-3

m = 2/3

Using the slope-intercept form,

y = MX + c

where

m =  slope

c = y-intercept(This is when x = 0)

Therefore,

c = 1

Finally, the equation will be y = 2/3 x + 1.

An equation is a mathematical statement consisting of two expressions joined by an equal sign. The ID applies to all values ​​of the variable. Constraint expressions apply only to specific values ​​of variables. A mathematical expression that expresses the relationship between two terms on either side of a letter.

Learn more about The linear equations here:-https://brainly.com/question/2030026

#SPJ1

Answer: Inequality form: x is less then or equal to 6 or xis greater then or equal to 8

Interval Notation: (-infinity,6] u [8,infinity)

Answer:

x ≤ 6 ∨ x ≥ 8

Step-by-step explanation:

x-7 ≥ 0

when

x≥7

if x≥7

x-7≥ 1

x ≥ 7 + 1

x ≥ 8

if x < 7

-x + 7 ≥ 1

-x ≥ -7 + 1

-x ≥ -6

x ≤ 6

Final solution

x≤ 6 ∨ x ≥ 8

SOLUTION:

Step 1:

we are to find the measure of minor arc cut off by one of the diagonals;

The sum of interior angles in a pentagon is:

Each interior angle of a regular pentagon is

So the size of the major arc can be gotten by the circle theorem; the angle at the centre is twice the angle at the circumference.

Then recall,

Step 2:

We are to find the length of the same minor arc in problem;

Where our angle (titan) is 144 and radius is 10

So the length of the minor arc, given that the radius is 10 cm is 8 pi

Answer:

Square footage

Step-by-step explanation:

we have the system

3x +y = -3

3x +y = 3

In this problem we have two different parallel lines

Remember that the solution of the system is the intersection point both lines

In this problem the lines don't intersect (are parallel)

therefore

the system has no solution NS

isolate the variable y in the first equation

y=-3x-3 -----> equation 1

isolate the variable y in the second equation

y=-3x+3 -----> equation 2

Solve the system of equations

equate equation 1 and equation 2

-3x-3=-3x+3

solve for x

-3x+3x=3+3

0=6 ------> is not true

that means

the system has no solution (NS)

5 + 3 = 8

3 + 5 = 8

The represent the same expression

When we reflect a point over y = x, the x and y coordinates become swapped and switch places, that is why (x,y) results to (y,x).

Therefore, the answer is true.

A line in slope-intercept form is represented by the following equation:

Parallel lines have the same slope, then if the line is parallel to the line y=-2x+5, the slope of the parallel line would be -2 too.

Now, by the given point (2,1) and knowing the slope of the line, we can use the slope-point form of the line equation to get the slope-intercept form:

Substituting:

Notice that the parallel line would be the same original line, y=-2x+5.