Can someone help pls.

Answer:

s = 28/9

Step-by-step explanation:

d/(7 x 2) + d/(2 x 2) = d/s

d/14 + d/4 = d/s

18d/56 = d/s

18/56 = 1/s

s = 28/9

The average speed is 28/9.

Average speed is the mean value of the speed of a body over a period of time. The formula for average speed is needed since the speed of a moving body is not constant and varies across a period of time. Even with varying speed, the values of total time and the total distance covered can be used, and with the help of the formula for average speed, we can find a single value to represent the entire motion.

Example

Using the average speed formula, find the average speed of Sam, who covers the first 200 kilometers in 4 hours and the next 160 kilometers in another 4 hours.

To find the average speed we need the total distance and the total time.

Total distance covered by Sam = 200Km + 160 km = 360 km

Total time taken by Sam = 4 hour + 4 hour = 8 hour

Average Speed = Total distance covered ÷ Total time taken

Average Speed = 360 ÷ 8 = 45km/hr

The average speed of a body is equal to the total distance covered, divided by the total time taken. The formula for average speed is given as:

Average Speed Formula:

Average Speed = Total distance covered ÷ Total time taken

Given:

halfway at 2mph and runs the rest of the way at 7mph

d/(7 x 2) + d/(2 x 2) = d/s

d/14 + d/4 = d/s

18d/56 = d/s

18/56 = 1/s

s = 28/9 mph

Learn more about average speed here:

https://brainly.com/question/12322912

#SPJ2

Answer:

3 / 24  I could be wrong  (Have a great day)

Length of part A:-

Length of path B

Now convert to miles

Path B:-

Path A:-

Chris may made error in decimals

Answer:

#1

Step-by-step explanation:

I am just guessing but its probably #1

Answer:

the answer is the 1st one

Step-by-step explanation:

Answer:

Nicole: 1, 5, 17, 53, 161, 485

Ian: 0, 1, 3, 7, 15, 31

Pairs: 1,0- 5,1- 17,3- 53,7- 161,15- 485,31

Step-by-step explanation:

The coordinate pairs of Nicole and Ian's rule are (5,1),(17,3),(53,5),(161,10),(485,20)

A coordinate is a system that uses one or more number to show the position of the points. It is in (x, y) form where x shows value on x axis and y shows value on y-axis.

We have been given that Nicole's rule is multiplied by 3 then add 2 starting with 1.

Values of Nicole's rule are 5,17,53,161,485.

Ian's rule is given as add 1/2 then multiply y 2 starting from 0. The values will be:

1,3,5,10,20.

Hence the coordinates are (5,1),(17,3),(53,5)(161,10),(485,20).

Learn more about coordinates at https://brainly.com/question/17206319

#SPJ2

Answer:

B

Step-by-step explanation:

If you are not altering the triangle in any way and just moving it (translating), they should be the same size and shape. Thus, both triangles are similar (the same shape) and congruent (equal to each other)

They want to use the numbers 0-9

Count the number of timers a color shos on the wheel and assign 1 number for each time the color shows:

Blue shows 4 times so you would assign blue the numbers: 0,1,2,and 3

There are 3 yellows so you would assign that 4, 5, and 6

There are 2 reds so , 7 and 8

and 1 green would be 9

Answer is D.

Answer:

125, 100, 80,64,51.2,40.96...

Step-by-step explanation:

y=[tex]\frac{4}{5}[/tex]x

So let's work backwards!

[tex]\frac{5}{4}[/tex](80)

=100

Then...

[tex]\frac{5}{4}[/tex](100)

=125

Hope this helps! :D

Answer:

  125, 100

Step-by-step explanation:

Perhaps the terms of your series are supposed to be ...

  __, __, 80, 64, 51.2, 40.96, ...

The common ratio is 64/80 = 0.8, so the recursive relation is ...

  t[n] = 0.8×t[n-1]

__

Solving for the previous term, we find ...

  t[n]/0.8 = t[n-1] . . . . . . divide by 0.8

or ...

  t[n-1] = 1.25×t[n] . . . . . rearrange

Then the term previous to 80 is 1.25×80 = 100.

And the term previous to 100 is 1.25×100 = 125.

The first two terms of the geometric sequence are 125 and 100.

option B

hope it helps...!!!

Answer:

Option B!

Step-by-step explanation:

x = amount of months.

Each month = + 20 coins.

*Each month x amount of months = y*

so 20x + 75(Coins dad gave)

Answer:

am i suppose to find x??

Step-by-step explanation:

The solution is, the required probability is 15/36 .

Probability can be defined as the ratio of the number of favorable outcomes to the total number of outcomes of an event.

here, we have,

from the given table, we get,

total number of sample space is 6 x6 = 36.

now, we get, that, the number of getting sum less than 7 is 15

we have,

probability = no. of the event/ no. of total outcome

                  = 15/36

we get this,

because if you solve everything below 7 that would give you 15 problems and there is 36 outcomes bc 6 x6 is 36.

Hence, The solution is, the required probability is 15/36 .

To learn more on probability click:

brainly.com/question/11234923

#SPJ7

PART A

If 4 pounds = 10 dollars...

4/2 = 2

10/2 = 5

So for 2 pounds, it would cost $5.00

Now for the 1 pound one

4/1 = 4

10/4 = 2.5

For the 1 pound one, it would cost $2.50

PART B

We know that 4 pounds = 10 bucks

Since 1 is 1/10 of 10 (in the cost section), we have to apply this to the pounds section. 4/10 = 0.4. Therefore, $1 = 0.4lb

Now for the last blank...

Since $1 = 0.4, we multiply that by 9. 0.4 x $9 = 3.6lb

HOPE THIS HELPED

Answer:

x=5

Step-by-step explanation:

<=>12x-4x=32+8<=>8x=40<=>x=40/8=5

Answer:

(5x-2)(5x+2)

Step-by-step explanation:

Rewrite 25x2 25 x 2 as (5x)2 ( 5 x ) 2 .

Rewrite 4 as 22 .

Since both terms are perfect squares, factor using the difference of squares formula, a2−b2=(a+b)(a−b) a 2 - b 2 = ( a + b ) ( a - b ) where a=5x a = 5 x and b=2 .

Question 1: x=12.5

6x+4x+2x+30=180

(One full line forming a semi circle would equal to 180 degrees all the angles given would therefore equal up to that value)

Add like terms to simplify;

12x+30=180

Use inverse operations to isolate the variable!

180-30=150

150/12=12.5

Check ur work!

6(12.5)+4(12.5)+2(12.5)+30=180

75+50+25+30=180

180=180

Question 2: Angle EAF = 25 degrees

Since x equals 12.5

and the equation given to represent the angle is 2x

2(12.5)=25

Question 3: Angle DAE= 50 degrees

x=12.5

Angle DAE=4x

4(12.5) = 50

Question 4: Angle CAD= 75 degrees

x= 12.5

Angle CAD= 6x

6(12.5) = 75

(if any are incorrect i apologize beforehand)

Answer: Point A because it is between -5.85.

Step-by-step explanation:

Answer:

[tex]\sqrt{149\\ \\[/tex]

However, that's the length of "c" and you're looking to drag it in. So,o you drag in 10^2+7^2=a^2.

Then, as shown by the first picture attatched, you can drag in the one with "c" and "a" with the five shown.

Step-by-step explanation:

To find "c" the diagonal, as explained, you need to use the theorem twice. You can first use it by finding "a", as you already have "b". To find a, you do 10^2+7^2=a^2, the hypotenuse.

100+49=149.

So, a is root 149.

a^2+b^2=c^2 so

149+25=174

a) The length of a, a² = 10² + 7²

b) The fourth Figure will be Drag in Last column.

The Pythagoras theorem states that the square of a triangle's hypotenuse is equal to the sum of its other two sides' squares.

Given:

As From the Figure, a² = 10² + 7²

a² = 100 + 49

a² = 149

a= √149

To find c the diagonal,

a² = 10²+ 7²

a² = 149

a = √149

Now, a²+b²=c²

The fourth Figure will be Drag in Last column.

Learn more about Pythagoras theorem here:

https://brainly.com/question/15421419

#SPJ2

Answer:

true

Step-by-step explanation:

Answer: 5,733.6

Step-by-step explanation:

337.8 x 17 = 5,742.6

5,742.6 - 9 = 5,733.6

Did I do it right or is it wrong?

Answer:

The answer is  5733.6

Step-by-step explanation:

Answer:

C.

Step-by-step explanation:

When we add up all the numbers we get 111 then we divide it by 10 which gives us 11.1. since we have no value to round to the tenths place, the answer stays the same.

Answer:

6

Step-by-step explanation:

The range of numbers is calculated by subtracting the smallest number from the largest one. So here, the smallest number is 79 and the largest is 85.

So, 85 - 79 = 6

Answer:

6

Step-by-step explanation:

Answer:

a. 52%

b. 56%

Step-by-step explanation:

a. 43+87=130

130/250×100

=52

b. 87+53=140

140/250×100

=56%

Answer:

1/12

Step-by-step explanation:

Answer:

1/12 DECIMAL FORM 0.083 REPEATING

Step-by-step explanation:

THAT IS JUST WHAT I GOT

Answer:

16,20

Step-by-step explanation:

As shown, you add four by each.

4+4=8

8+4=12

So, 12+4=16

16+4=20

Answer:

16 and 20

Step-by-step explanation:

In the arithmetic squence, we can tell that 4 is being added to each term.

Thus, we obtain the following rule:

To find the next two terms in the sequence, we need to determine the fourth and fifth term of the sequence. Let us substitute the "4" and "5" in the rule to determe the next two terms in the sequence.

Determining the 4th term of the sequence:

⇒ 4x

⇒ 4(4)

⇒ 16

Determining the 5th term of the sequence:

⇒ 4x

⇒ 4(5)

⇒ 20

Thus, the next two terms are 16 and 20.

Answer:

C

Step-by-step explanation:

Alternate interior angles

Answer:

I Have shown how to in the image below

Step-by-step explanation:

Answer:

:2.50:The average rate of change over the interval −2≤x≤2 is:(f(2) − f(-2)) / (2 − -2)

Step-by-step explanation:

A rate of change formula is used to calculate the rate which describes how one quantity changes in relation to the change in another quantity

Step-by-step explanation:

height(h) = 12

slant height (l) = 15

side(a) = 18

TSA of pyramid = a^2 + 2al

                           = (18)^2 + 2* 18*15

                           = 864m^2