17. A man can row at 8 km/hr in still water. If the
river is running at 2 km/hr, it takes him 48
minutes to row to a place and coming back. How
far is the place ?
(a) 1 km
(b) 2 km en
(c) 3 km
(d) 4 km

Answers

Answer 1

Answer:

(c) 3 km

Step-by-step explanation:

Speed in still water: 8 km/h

Speed of river: 2 km/h

Speed downstream: 8 km/h + 2 km/y = 10 km/h

Speed upstream: 8 km/h - 2 km/h = 6 km/h

total time both ways: 48 minutes = 48/60 hour = 0.8 hour

time to go upstream: t

time to go downstream: 0.8 - t

speed = distance/time

s = d/t

d = st

Upstream:

d =  st

d = 6t

Downstream:

d = st

d = 10(0.8 - t)

The distance upstream and downstream is the same.

6t = 10(0.8 - t)

6t = 8 - 10t

16t = 8

t = 0.5

d = 6t = 6(0.5)

d = 3

Answer: (c) 3 km


Related Questions

8+1/2(12)=x


Solve please

Answers

Answer:

8+ 1/2 (12) = x

8+ 6 = x

Therefore x = 14

Answer:

The answer is X = 14

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

Step 2: Flip the equation.

POSSIBLE POINTS: 1
Which of the following situations involve opposite quantities combing to make 0 ?
Stella has a new piggy bank. She adds 3 quarters on Tuesday and then adds another 3 quarters on Thursday.
Devon opens a new checking account with $30. His first purchase made with his new debit card, totals $28.
Joe makes 1 1/2 liters of lemonade and drinks it all during the afternoon.
Brittany is writing a novel. She wrote 4 new pages to finish Chapter 1. When she reviews Chapter 1, she discards these 4
pages and an additional 4 pages.

Answers

Answer:

2) Joe makes 1 1/2 liters of lemonad and drinks it all during the afternoon.

Step-by-step explanation:

1.5 - 1.5=0

First step in copying an angle?

Answers

Answer:

Make a point P that will be the vertex of the new angle.

From P, draw a ray PQ. ...

Place the compasses on point A, set to any convenient width.

Draw an arc across both sides of the angle, creating the points J and K as shown.

Step-by-step explanation:

These are the steps to copying an angle

I hope this helps you :)

Answer:

make a point p

hope this helps

Segment AB is congruent to segment AB. This statement shows the ______ property. reflexive symmetric transitive substitution

Answers

Answer:

the answer is reflective

Step-by-step explanation:

Answer:

A). reflexive

Step-by-step explanation:

The correct answer is reflexive. I know because I got it right on the Edge quiz. Trust me!

We are solving for #4

Answer: 3.50p + 5.50p +6 = 51; 61

Answers

Answer: 5 people

Step-by-step explanation:

For this word problem, we can use the description in the problem to construct an equation. Let's use x for number of people.

3.5x+5.5x+6=51         [combine like terms]

9x+6=51                      [subtract both sides by 6]

9x=45                         [divide both sides by 9]

x=5

There were 5 people that went to the fair.

8x-3x+2=______ I need the equation to be a no solution

Answers

8x-3x+2=
-(3+2)
-(3-2)
-1
8x-1 is the correct answer

Which inequalities can be used to find the solution set of the following inequality? Check all that apply. |2x – 5| Greater-than-or-equal-to 8 (2x – 5) Greater-than-or-equal-to 8 (2x – 5) Less-than-or-equal-to 8 (2x + 5) Greater-than-or-equal-to 8 –(2x – 5) Greater-than-or-equal-to 8 –(2x + 5) Greater-than-or-equal-to 8

Answers

Answer:

its 1 and 4

1. (2x – 5) ≥ 8

4. –(2x – 5) ≥ 8

Step-by-step explanation:

i just did the test

Answer: A,D

Step-by-step explanation:

An item has a listed price of $95. If the sales tax rate is 9%, how much is the sales tax (in dollars)?

Answers

$8.55 You take the 95 dollars and multiply it by the sales tax (0.09) to get $8.55

F(x)=-2x^2 -5x+1
H(x)=3(x+3)^2-11

H(f(-1))=?

A.132
B. 136
C.140
D.144

Answers

Answer:

B

Step-by-step explanation:

So we have the two functions:

[tex]f(x)=-2x^2-5x+1\text{ and } h(x)=3(x+3)^2-11[/tex]

And we want to find:

[tex]h(f(-1))[/tex]

So, find f(-1) first. Substitute -1 into f(x):

[tex]f(-1)=-2(-1)^2-5(-1)+1[/tex]

Square:

[tex]f(-1)=-2(1)-5(-1)+1[/tex]

Multiply:

[tex]f(-1)=-2+5+1[/tex]

Add:

[tex]f(-1)=4[/tex]

Now, substitute this into h(f(-1)):

[tex]h(f(-1))=h(4)[/tex]

So, substitute 4 into h(x):

[tex]h(4)=3(4+3)^2-11[/tex]

Add:

[tex]h(4)=3(7)^2-11[/tex]

Square:

[tex]h(4)=3(49)-11[/tex]

Multiply:

[tex]h(4)=147-11[/tex]

Subtract:

[tex]h(4)=136[/tex]

So, our answer is B.

And we're done!

What is 13/100 in simplest form?

Answers

it's already in simplest form, 13 is a prime number

Answer:

0.13

Step-by-step explanation:

What is the product?
(y^2+3y+7][8y^2+y+1)

Answers

Answer:

8 y^ 4 + 25 y^ 3 + 60 y^ 2 + 10y + 7

Hope this helps!

Answer:

8 y^ 4 + 25 y^ 3 + 60 y^ 2 + 10y + 7

Step-by-step explanation:

edge 2021

Which two numbers of the given data set have the same absolute value? Explain your answer in full sentences.

-5, 5, -3, 8
pls help. ;)

Answers

Answer:

The answer is -5 and 5 because when you do absolute value if there is a negative number then it turns into a positive number. Negatives will always turn out as positives when doing absolute value. :)

Step-by-step explanation:

Answer: the two numbers that have the same absolute value is -5, and 5.

Step-by-step explanation:

Absolute will just make any negatives to positive.

So, the absolute value of -5 is 5,  or the absolute value of -3, is 3.

If it's already positive, then nothing happens; it stays the same

So, the absolute value of 8 is 8, nothing is changed.

Solve for x.

[tex] - 2(6 + x) = 18 - 3x[/tex]

x = [?]​

Answers

-2(6 + x) = 18 - 3x
-12 - 2x = 18 - 3x
-2x + 3x = 18 + 12
x = 30

2x^3 + x^2 – 7x – 6 divided by 2x +3

Answers

Answer:

x^2 -x -2

Step-by-step explanation:

Use polynomial long division.

           0 + x^2  -x  -2

           ___________________________________

(2x+3)  |  2x^3  +x^2  -7x  -6

           -2x^3  -3x^2

            _________

                      -2x^2 -7x

                      +2x^2  +3x

                       __________

                                   -4x  -6

                                    +2x  +6

                                   _______

                                          0

I f m ∠ P i s t h r e e l e s s t h a n t w i c e t h e m e a s u r e o f ∠ Q , a n d ∠ P a n d ∠ Q a r e s u p p l e m e n t a r y a n g l e s , f i n d t h e m ∠ P .

Answers

Answer:

The value of angle P is 119 degrees

Step-by-step explanation:

When two angles are supplementary, it means that they add up to be 180 degrees. For example, if we have two angles only on a straight line, then both angles are supplementary angles.

Now, the information we have from the question is that angle P is three less than twice the measure of Q.

What this mean is that if Q is x, then P is 2x-3

So let’s add both to equal 180 since they are supplementary;

x + 2x -3 = 180

3x -3 = 180

3x = 180 + 3

3x = 183

x = 183/3

x = 61

This is the value of Q;

The value of P which we are asked to look for is 2x -3 = 2(61) -3 = 122 -3 = 119 degrees

...............................

what is y 5(y -10)=-5

Answers

Answer:

y=9

Step-by-step explanation:

5(y-10)=-5

We move all terms to the left:

5(y-10)-(-5)=0

We add all the numbers together, and all the variables

5(y-10)+5=0

We multiply parentheses

5y-50+5=0

We add all the numbers together, and all the variables

5y-45=0

We move all terms containing y to the left, all other terms to the right

5y=45

y=45/5

y=9

The value of y = 9 is correct. Therefore, the solution is y = 9.

To solve the equation 5(y - 10) = -5 for y, follow these steps:

Step 1: Distribute the 5 on the left side of the equation:

5y - 50 = -5

Step 2: Move the constant term to one side by adding 50 to both sides:

5y - 50 + 50 = -5 + 50

Step 3: Simplify the left side and evaluate the right side:

5y = 45

Step 4: Isolate y by dividing both sides by 5:

5y / 5 = 45 / 5

Step 5: Simplify and calculate y:

y = 9

The solution to the equation is y = 9. To verify, substitute y with 9 in the original equation:

5(9 - 10) = -5

5(-1) = -5

-5 = -5

Since both sides are equal, the value of y = 9 is correct. Therefore, the solution is y = 9.

To know more about Distribute:

https://brainly.com/question/30423130

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Nerissa has 5 pink bows,1 blue bow and 4 purple bows in a box. She will randomly choose 1 bow form the box.
What is the probability nerissa will choose a purple bow?

Answers

4:10. Is the probability

help..........me .................

Answers

Answer:

good morning foul human i cannot help you because i cant see your images if you could type them out i might have enough brain cells left to help you adios amigo

Step-by-step explanation:

()  c=3

Someone please help whats the answer

Answers

x=3 hope it helped!!
The answer is A.) x=3

Factor each Polynomial. 3x² + 28x + 32=

Answers

[tex]\text{Hello! :)}[/tex]

[tex]\large\boxed{(3x + 4)(x + 8)}[/tex]

[tex]\text{Factor the polynomial:}\\3x^{2} +28x +32\\\\\text{Find two numbers that multiply into 32 and sum up to 28.}\\\text{Take into account the leading coefficient of 3:}\\\\\text{The numbers 4 and 8 work; arrange them so that they sum up to 28:}\\\\(3x + 4)(x + 8)[/tex]

What are the equivalent expressions for aº and a " ? Why do
these rules work?

Answers

Hopefully this helps and makes sense to you if you don’t understand ask another question to me or anyone hehe

Wich of the following numbers is larger than 4 1/4 but smaller than 4 3/4

Answers

Answer:

4 2/4

Step-by-step explanation:

If you only want the answer in whole number and quarters, that's the only answer. Otherwise, it could be a lot more answers. Let me know if this helps! :)

HELP I'M GONNA FAIL​

Answers

Answer:

1/10

Step-by-step explanation:

7000/70000=1/10

1/10 would be the correct answer

What is the answer to X(x+7)

Answers

Answer:

[tex] \boxed{ \bold{ \boxed {\huge{ \sf{ {x}^{2} + 7x}}}}}[/tex]

Step-by-step explanation:

[tex] \sf{x(x + 7)}[/tex]

Distribute x through the parentheses

[tex] \dashrightarrow{ \sf{x \times x + x \times 7}}[/tex]

[tex] \dashrightarrow{ \boxed{ \sf{ {x}^{2} + 7x}}}[/tex]

Hope I helped!

Best regards! :D

What is the slope of the line through (-7,-2) and (-6, 7)?
Choose 1 answer:
1
9
B
-9
9

Answers

Answer:

9

Step-by-step explanation:

Slope is rise over run or change y/change x.

7 - -2 = 9

-6 - -7 = 1

Slope = 9/1 or 9

___________________________________________________I AM ALWAYS HAPPY TO HELP :)

[tex] {3}^{a} = \frac{1}{9} [/tex]
[tex] {3}^{b} = 9 \sqrt{3} [/tex]

[tex] {3}^{c} = \frac{1}{ \sqrt{3} } [/tex]

Work out the value of a + b + c​

Answers

Answers:
a) -2
b) 5/2
c) -1/2
Answer:

a = -2

b = 5/2

c = -1/2

Step by step explanation:

Find the distance between each pair of points (-2,3) , (-7, -7)

Answers

Answer:

D = [tex]5\sqrt{5}[/tex]

Step-by-step explanation:

[tex]d= \sqrt{(x_2-x_1)^2+(y_2-y_1)^2} \\d= \sqrt{(-7-(-2))^2+(-7-3)^2} \\d= \sqrt{(-5)^2+(-10)^2} \\d= \sqrt{25+100} \\d= \sqrt{125} \\d= 5\sqrt{5}[/tex]

Diamond bought a few swirl marbles and divided it equally among four of her friends and her brother, Jordan. While playing, Jordan lost 4 marbles and has only 8 marbles at present. Find how many marbles Diamond bought in all.

Answers

Answer:

45?

9 marbles x 5 (four of her friends plus jake)

Step-by-step explanation:

I really need help on this

Answers

i tried to be as detailed as possible...if you’re mainly just looking for answers...look for the arrows like this ↳

A rectangle has a height of 7a² and a width of a4 + 5a2 + 4.
Express the area of the entire rectangle.
Your answer should be a polynomial in standard form.

Answers

Answer:

[tex]( {7a}^{2} \times {a}^{4} ) + ({7a}^{2} \times {5a}^{3}) + ( {7a}^{2} \times 4) = {7a}^{6} + {35a}^{5} + {28a}^{2} [/tex]

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