If you bike for 60km at 30km/h and return at 20km/h what is your average speed for the whole trip

Answers

Answer 1
your average speed is 24Km/h


Related Questions

What is factor out the coefficient of the variable of 4h-3

Answers

Strictly speaking, you cannot factor 4 out of 3.  But you can divide 3 by 4 and obtain 3/4:

4h - 3 = 4[h - 3/4]

22 less than 5 times a number f into a algebraic expression

Answers

5f-22 =x (or any variable)
22
less than = <
5 times a number f = 5f

22 < 5f

This is your equation. The next few steps are to solve, but you might not have to solve. 

*DO NOT USE NEXT FEW STEPS IF NOT SUPPOSED TO SOLVE*

To solve it, you divide both sides by 5.

22 ÷ 5 = 4.4
5f ÷ 5 = f

Solution: f < 4.4

Hope this helps! :D

After a discount of 10%, the price of a pair of jeans, including tax, was $69.62. The following equation can be used to find x, the price of the pair of jeans without the discount:

x - 0.1x + 0.07(x - 0.1x) = 69.62

What is the price of the pair of jeans without the discount?

A-$70.58
b-$72.29
c-$74.86
d-

Answers

The price without the discount would be b-$72.29

First, we need to multiply all numbers that contain variable x



x -0.1 x + 0.07x - 0.007x = 69.62

0.963 x = 69.62

After this, we just need to find the value of x

x= 69.62 / 0.963

x = 72.29

69.5 is What precent of 85?

Answers

69.5 percent of 85 is 59.075 
69.5 x 100= 6950
6950 ÷ 85 = 81 percent

The sum of any two consecutive prime numbers is also prime

Answers

Let's consider two prime numbers where each is larger than 2

Say the primes 7 and 11. Adding them gets us 7+11 = 18. This counter example disproves the initial claim since 18 = 9*2 = 6*3 making 18 composite (not prime)

In general, if we let p and q be two primes such that q > p > 2 and q is the next prime after p, then p and q are both odd. If any of them were even then they wouldn't be prime (2 would be a factor)

Adding any two odd numbers together leads to an even number

Proof:
p = 2k+1 where k is some integer
q = 2m+1 where m is some integer
p+q = 2k+1+2m+1 = 2(k+m) + 2 = 2(k+m+1) which is in the form of an even number

That proof above shows us that adding any prime larger than 2 to its next prime up leads to an even number. This further shows us that the claim is false overall. It is only true if you restrict yourself to the primes 2 and 3, which add to 5. Otherwise, the claim is false. 

What is the general term equation, an, for the arithmetic sequence 5, 1, −3, −7, . . . , and what is the 21st term of this sequence?

Answers

The general term is obtained by starting with the initial value 5 and then subtracting 4 each time you wish to generate a new term:

a2 = second term = 5+(2-1)(-4)       =    5+(-4) = 1

General term:

an = nth term = 5+(n-1)(-4)

Thus, the 21st term is 5+(21-1)(-4) = 5 + (20)(-4) = -75 (answer)

how do you factor 30n^2b-87nb+30b?

Answers

It's not clear whether you meant 30n^(2b) or [30n^2] b.

I will assume the latter.

b can then be factored out of all  three terms, resulting in 

b [30n^2 - 87n + 30]     = b [ 3 ] [10n^2 - 29n + 10 ]

Can you factor this further?

Help with #30 Please!

Answers

188/47637= 0.0039% chance
40 x 0.0039 = 0.0000975% chance

It is a exteremely low chance that those that left against medical advice.

Which means the others have a exteremely high percentage, of 99.0061% and 99.0000025% chance

hope this helps

The sum of three consecutive integers is 90. Find the integers

Answers

the numbers are 29,30,31.

The sum of three consecutive integers is 90. So you know that 3 numbers that are next to each other in numerical order equals 90.

First step: Make an equation:

Let's take x as the smallest of the three numbers.

[tex]x +(x+1)+(x+2)=90[/tex]

2nd step: Open the brackets:

[tex]x+x+1+x+2=90[/tex]

3rd step: Simplify:

[tex]3x+3=90[/tex]

4th step: Keep similar integers on one side of the equation

[tex]3x+3-3=90-3[/tex]

5th step: Solve for x:

[tex]3x=87[/tex]

[tex]\frac{3x}{3} =\frac{87}{3}[/tex]

[tex]x=29[/tex]

So if the numbers are consecutive, they have to be next to each other.

Answer: 29, 30, 31

If you want more answers like this, check my profile to see other descriptive answers I made.

A black-tailed jackrabbit hops about 7 feet in a single hop how far can a hop in 5 seconds

Answers

The answer for this is 35 you have to multiply 5 by 7 and you will get your answer

Answer:

A black-tailed jackrabbit can hopes 36 in 5 seconds.

Step-by-step explanation:

Consider the provided information.

Black tailed jackrabbit hopes 51 feet in one second.

Therefore, in 5 second Black tailed jackrabbit covers a distance of:

51×5=255  feet

So, in 5 seconds a black-tailed jackrabbit will travel 255 feet.

In one hops Black tailed jackrabbit covers 7 feet.

Now find the number of hops, we need to divide the distance by the length of one hop:

[tex]255\div 7=\frac{255}{7}\approx36[/tex]

Hence, A black-tailed jackrabbit can hopes 36 in 5 seconds.

Birth weights of babies born to full-term pregnancies followed roughly a normal distribution. at meadowbrook hospital, the mean weight of babies born to full-term pregnancies is 7 pounds with a standard deviation of 14 ounces (1 pound = 16 ounces). what is the probability that the average weight of the four babies will be more than 7.5 pounds

Answers

Final answer:

To find the probability that the average weight of four babies will be more than 7.5 pounds, we calculate the z-score and look it up in the standard normal distribution table. The probability is approximately 0.2843, or 28.43%.

Explanation:

To find the probability that the average weight of four babies will be more than 7.5 pounds, we need to calculate the z-score and look it up in the standard normal distribution table.

First, we convert the weight of 7.5 pounds to ounces: 7.5 pounds * 16 ounces = 120 ounces.

Next, we calculate the z-score using the formula: z = (x - &&mu;) / &&sigma;, where x is the given weight, &&mu; is the mean weight, and &&sigma; is the standard deviation. In this case, z = (120 - 112) / 14 = 0.571.

Finally, we can look up the probability using the z-score in the standard normal distribution table. The probability of the average weight of four babies being more than 7.5 pounds is approximately 0.2843, or 28.43%.

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One number is 4 less than a second number. Twice the second number is 16 less than 5 times the first. Find the two numbers.

Answers

Call the first number x and the second number y.

x = y - 4
2y = 5x - 16

Substitute what x equals from the first equation in the second equation.

2y = 5(y - 4) - 16

2y = 5y - 20 - 16

-3y = -36

y = 12

Now use the first equation for find x.

x = y - 4

x = 12 - 4

x = 8

The numbers are 8 and 12.

Let's check:

8 is 4 less than 12.

Twice 12 is 24.
5 times 8 is 40, and 16 less than 40 is 24.

Our answer is correct.

The two numbers are 8 and 12.

What is Algebraic expression ?

Algebraic expressions are numbers expressed using letters or alphabets without specifying their values. Algebra taught us how to express unknown values using letters such as x, y, and z. There can also be a single value that is placed before and multiplied by a variable in an algebraic expression in addition to these letters, which are called variables.

Let us assume first number be = x

and, let the second number be = y

the,

One number is 4 less than a second number means :

x = y - 4........(1)

Twice the second number is 16 less than 5 times the first means :

2y = 5x - 16.......(2)

Substitute x equals from the first equation in the second equation.

2y = 5(y - 4) - 16

2y = 5y - 20 - 16

-3y = -36

y = 12

Now use the first equation for find x.

x = y - 4

x = 12 - 4

x = 8

Thus, The numbers are 8 and 12.

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What point in the feasible region maximizes the objective function constraints: x>=0 y>=0 -x+3>=y y<=1/3 x+1 Objective function: C=5x-4y Please explain!

Answers

c= o because the c=5x-4y the x is 0 and the y is 0 so your answer is zero 

Answer:

So, the maximum of C is 15 at (3,0) and the minimum value is 0 at (0,0)

Step-by-step explanation:

When you graph all of the constraint functions, the vertices of the shape that is made are at the points above. Now you plug those points into the function equation C=5x-4y and see where you get a max or min.

(0,1)

(1.5,1.5)

(0,0)

(3,0)



(1,1)=C=1

(1.5,1.5)=C=1.5

(0,0)=C=0

(3,0)=C=15

So, the maximum of C is 15 at (3,0) and the minimum value is 0 at (0,0)

Lydia purchased a 15 cup bag of pasta. the suggested serving is 3/4 cup per person. how many servings are in a 15 cup bag of pasta

Answers

The answer is 20, if you divided 15 by 3/4, you have your answer.

To find out how many servings are in a 15 cup bag of pasta when serving size is 3/4 cup per person, divide 15 by 3/4, which equals 20 servings.

Firstly, convert the mixed fraction into an improper fraction for easier division: 3/4 remains the same since it is already a proper fraction.

Now, carry out the division: 15 ÷ (3/4)
= 15 × (4/3) (You multiply by the reciprocal of 3/4)

Then, multiply the numbers:
= 15 × 4 ÷ 3
= 60 ÷ 3
= 20

Therefore, there are 20 servings in a 15 cup bag of pasta when the serving size is 3/4 cup per person.

Kareem runs 6 miles in 55 minutes. At the same rate, how many miles would he run in 44 minutes?

Answers

Use an equation of proportions to solve this problem.

   x             44 min
-------- =  ------------
 6 mi         55 min

Reduce this to x/6 = 1/11.  Then 11x = 6, and x = 11/6 miles, or 1 5/6 miles.

55x = 264   =>    4.8 miles in 44 minutes.

What is the answer to 5(6*5)

Answers

if you are doing order of operations the answer is 145 but if you are doing distribute property the answer would be 30 25
Hope this helps
the answer is 150, hope this helps!

if the sin 30 degrees is 1/2 then the cos ____=____.

Answers

  Try A) 60 degrees; 1/2. Your answer was incorrect because cos(60 degrees) is 1/2, cos(30 degrees) is square root 3 /2 not 1 or square root 2 /2

We have that if the sin 30 degrees is 1/2 then the cos __60=1/2.__

Option C

Trigonometry

Question Parameters:

The sin 30 degrees is 1/2

Generally, the Trigonometry of a right angle triangle gives values for sin, cos, tan.

Using the triangle we have that

if the sin 30 degrees is 1/2 then the cos60=1/2

Therefore, if the sin 30 degrees is 1/2 then the cos __60=1/2__.

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Which second-degree polynomial function has a leading coefficient of 3 and roots –4 and 6?

Answers

You can find the second-degree polynomial function that has a leading coefficiente of 3 and roots - 4 and 6, in this way:

f(x) = 3 (x + 4) (x - 6)

Now expand the parenthesis using the notable product

f(x) = 3 (x^2 - 2x - 24)

Now use distributive property:

f(x) = 3x^2 - 6x - 72

As you see it has leading coefficient 3 and you can demonstrate that the roots are - 4 and 6.

Answer: f(x) = 3x^2 - 6x - 72

The number of bacteria (b) in a batch of refrigerated food is given by the function b(t) = 20t2 − 70t + 300, where t is the temperature of the food in degrees Fahrenheit. The function t(h) = 2h + 3 gives the temperature of the food h hours after it is removed from refrigeration. Which expression correctly represents the number of bacteria (b) in the food as a function of the number of hours (h) the food is unrefrigerated?

Answers

We want to combine b(t) and t(h) to create a function that described the number of bacteria, b, as a function of time, h. 
This function can be called b(t(h)), or b(h).
Consider the function b(t), or bacteria as a function of temperature. 
b(t) = 20t² - 70t +300
This describes the number of bacteria, given the temperature.

t(h) described the temperature as a function of time, specifically hours after refrigeration:
t(h) = 2h + 3

Since the time h can tell us the temperature t, and the temperature t can tell us the # of bacteria b, we can create a function that tells us the number of bacteria, b, given hours following refrigeration, h.

To do this, we plug t(h) in for every t in the b(t) function:
b(t(h)) = 20 (2h+3)² - 70(2h+3) + 300
We can also call this function b(h), since we now can express b as a function of h.

Simplify the function:
b(h) = 20 (4h²+12h+9)-14h-210+300
b(h) = 80h² +100h +270

The Answer is B

Given:
b(t) = 20t² - 70t + 300
t(h) = 2h + 3

Therefore
b(h) = 20(2h + 3)² - 70(2h + 3) + 300
       = 20(4h² + 12h + 9) - 140h - 210 + 300
       = 80h² + 240h + 180 - 140h - 210 + 300
       = 80h² + 100h + 270

Answer:  b(h) = 80h² + 100h + 270

Justin is exchanging dollars for rolls of quarters and rolls of dimes at a bank. Each roll of quarters has a value of $10 and each roll of dimes has a value of $5. He exchanges $90 and receives 11 rolls of coins. How many of each type of roll of coins did he receive?

Answers

6 rolls of dimes = $30.

6 rolls of quarters = $60.

Answer:

7 roll of quarter and 4 roll of dimes.

Step-by-step explanation:

Let x be the number of rolls of quarters and y be the number of rolls of dimes,

Given,

Total rolls = 11

⇒ x + y = 11 ------(1),

Also, the total value of $ 90 in which Each roll of quarters has a value of $10 and each roll of dimes has a value of $5.

⇒ 10x + 5y = 90 ------(2),

Equation (2) - 5 × Equation (1),

We get,

5x = 90 - 55

⇒ 5x = 35 ⇒ x = 7

From equation (1),

7 + y = 11 ⇒ y = 4

Hence, the number of roll of quarters = 7,

And, the number of roll of dimes = 4

what percent of 176 is 17.6

Answers

10%

To find 100% percent sure, multiply 17.6 *10

17.6 * 10 = 176
To get the solution, we are looking for, we need to point out what we know.

1. We assume, that the number 176 is 100% - because it's the output value of the task.
2. We assume, that x is the value we are looking for.
3. If 176 is 100%, so we can write it down as 176=100%.
4. We know, that x is 17.6% of the output value, so we can write it down as x=17.6%.
5. Now we have two simple equations:
1) 176=100%
2) x=17.6%
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
176/x=100%/17.6%
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 17.6% of 176

176/x=100/17.6
(176/x)*x=(100/17.6)*x       - we multiply both sides of the equation by x
176=5.6818181818182*x       - we divide both sides of the equation by (5.6818181818182) to get x
176/5.6818181818182=x
30.976=x
x=30.976

now we have:
17.6% of 176=30.976

The perimeter of a rectangular house is 122 ft. the width is 5 ft less than the length. find the length and the width.

Answers

Attached a solution and showed work.

Given that the restaurant is located in a city with a population over 500,000, what is the probability that it is in the northeast?

Answers

The probability is 0.187 or 18.7% that the restaurant chosen at random is in the north east and is located in a city with a population over 500,000.

To find the likelihood that a haphazardly picked eatery from the 588 outlets situated in a city with a populace more than 500,000 is in the north east, we really want to know the quantity of cafés that meet these two rules and are situated in the north east.

Let's look for this information using the table:

Northeast Midwest South West More than 500,000 Over 500,000 110 95 178 66 Less than 500,000 53 39 38 9 The table indicates that 110 restaurants are located in the north east of the United States in cities with more than 500,000 residents. In this manner, the likelihood that a haphazardly picked eatery from the 588 outlets situated in a city with a populace more than 500,000 is in the north east is:

P(Northeast and North of 500,000) = 110/588 = 0.187

Thus, the likelihood is 0.187 or 18.7% that the café picked aimlessly is in the north east and is situated in a city with a populace more than 500,000.

Write 0.0004571 in scientific notation.

Answers

4.571 X 10^-4

you do this by moving the decimal until there is no zeros, to the left of the decimal point.
scientific notation means to write the answer in standard form. standard form helps you to express numbers that are too big or too small to be conveniently written in decimal form.
so for this case, it will be 4.571×10^-4.
when the number is decimal, you move the dot to the right and it will always be multiplying 10 to the power of a negative power.

An airline, believing that 4% of passengers fail to show for flights, overbooks (sells more tickets than there are seats). suppose that for a particular flight involving a jumbo-jet with 267 seats, the airline sells 276 tickets.
a. what is the expected number of ticket holders that will fail to show for the flight?

Answers

276/100=2.76  2.76=1%
2.76*4=11 rounded
11 people will fail to show

The expected number of ticket holders that will fail to show for the flight is 11.

Given that,

There is a fail percentage of 4%.There are 267 seats.And, the 276 airline tickets are sold.

Based on the above information,

= 276%

= 2.76

Now the number of ticket holders who fail for presenting the flight should be

[tex]= 2.76\times 4[/tex]

= 11

Therefore we can conclude that the expected number of ticket holders that will fail to show for the flight is 11.

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What is 2r+7+r=? I'm not sure

Answers

3r+7 I think...........
2r + 7 + r = ?

Combine like terms.

(2r + r) + 7 

Simplify.

3r + 7 

~Hope I helped!~

The surface area of an open-top box with length L, width W, and height H can be found using the formula: A= 2LH + 2WH + LW Find the surface area of an open-top box with length of 7 cm, width 6 cm, and height 3 cm.

Answers

The area would be 120cm^2

Final answer:

The surface area of an open-top box with a length of 7 cm, width of 6 cm, and height of 3 cm is calculated using the formula and comes out to be 120 cm².

Explanation:

To find the surface area of an open-top box with given dimensions, we use the formula: A= 2LH + 2WH + LW. Substituting in the provided lengths for length (L), width (W), and height (H):

A = 2(7 cm)(3 cm) + 2(6 cm)(3 cm) + (7 cm)(6 cm)

A = 2(21 cm²) + 2(18 cm²) + 42 cm²

A = 42 cm² + 36 cm² + 42 cm²

A = 120 cm²

This gives us the total surface area of the open-top box which is 120 cm².

During the 2008-2009 season,there were 801,372 people who attended the home hockey games in Philadelphia.There were 609,907 people who attended the home hockey games in Phoenix. How much greater was the home attendance in Philadelphia than in Philadelphia than in Phoenix that season?

Answers

the answer is 191,465

you earn $70 per week mowing lawns one week you work 10 hours during the week and spend $20 on gasoline for your mower how much do you earn each hour

Answers

Total income is $70/week.  $20 of that goes towards the cost of gas.  Thus, the net earnings were $50 for the week.

$50
-------------------  =  $5 per hour
    10 hours

there are 182 seats in a theater. The seats are evenly divided into 13 rows. How many seats are in each row

Answers

There are 14 seats in each row. 
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