Mathematics High School

The speed of boat in still water is 15km/hr if needs 4 more his to travel 63 km against the current of a river than it needs to travel down the river determine the system of equation

Answers

Answer 1

Answer:

[tex]\frac{63}{15 - c} - \frac{63}{15 + c} = 4[/tex]

Step-by-step explanation:

The systems of equations are

Let us assume the rate of the current be c

Now actual speed against the current is (15 - c)

And, the actual speed with the current is (15 + c)

Here we applied the time formula i.e. distance by speed

Also the upstream time  - downstream time = 4

Now the equations are

[tex]\frac{63}{15 - c} - \frac{63}{15 + c} = 4[/tex]

Related Questions

Evaluate a = 6, b = 5, c = 9 a*b*c/2 + 2(a*b*c) = ?

Answers

Answer:

675

Step-by-step explanation:

Answer:

675

Step-by-step explanation:

plug in the #'s

6*5*9/2 +2(6*5*9)

6*5*9=270

270/2=135

135+2(270)

135+540

675

What expression has the same meaning as 2 7/4

Answers

Question:What expression has the same meaning as 2 7/4?

Step-by-step explanation:15/4 also means 2 7/4 if that's what you mean.

Answer:

it s b) 4 2 the power of 7

Step-by-step explanation:

If one figure is translated, rotated and dilated to create its image, the two figures will be __________ .
Group of answer choices

translation

congruent

similar

opposite
PLEASE ANSWER ASAP

Answers

Similar is the answer because no matter the transformation done to the figure it’s always going to be similar to the image(after transformation figure) not necessarily congruent but similar

Please please help please please ASAP please I'm begging you please I have 10 minutes please y'all help please any ACE that can help please

Answers

Answer:

6

Step-by-step explanation:

We know that the two quads are of similar and the ratio is 1:2, thus

AB/RS = 1/2

3/x = 1/2

x = 6

What is x equal to in this problem?

Answers

Answer:

x = 11?

Step-by-step explanation:

I do not know right now sorry hope someone else helps you!

x puᴉɟ oʇ ǝʌɐɥ noʎ

[tex] \frac{x {}^{2} }{5 {}^{2} } = {4}^{2} [/tex]
​

Answers

Hello there! The value of x is 20 or -20

"20 or - 20" is one answer so you are supposed to answer 20 or -20, not choose only one.

Step-by-step explanation:

[tex] \large{ \frac{ {x}^{2} }{ {5}^{2} } = {4}^{2} }[/tex]

First, we simplify 5² and 4²

[tex] \large{ \frac{ {x}^{2} }{25} = 16}[/tex]

Multiply the whole equation by 25 to get rid of the denominator.

[tex] \large{ \frac{ {x}^{2} }{25} (25) = 16(25)} \\ \large{ {x}^{2} = 400}[/tex]

Square both sides and solve the equation.

[tex] \large{ \sqrt{ {x}^{2} } = \pm{ \sqrt{400} }}[/tex]

Also don't forget to write "plus or minus" symbol when we are solving a quadratic equation by squaring both sides.

[tex] \large{x = \pm{20}}[/tex]

If the slowest time and the fastest time are removed from the data, how does the new mean compare to the mean of the original data set?

A. The mean would not be comparable as the data sets are different.

B.The mean would increase as there is less variability in the data.

C. The mean would decrease as there is less variability in the data .

D.The mean would not change as the lowest and greatest values were removed .

Please help hurry

Answers

Answer:

A or C  Sorry!

Step-by-step explanation:

(11 + 4) ÷ 3 × [tex]\sqrt{64}[/tex]

Answers

Answer:

40

Step-by-step explanation:

The answer should be 40 assuming that there are positive real numbers.

You simplify the radical into a product with known factors

sorry If that doesnt make sense lol

Only questions 2, 3, 6, 11, 12, 13 fifth grade

Answers

Answer:

zoo wee mama

Step-by-step explanation:

2-8.172                                                                                                                         3-172 r1                                                                                                                      6-1.04                                                                                                                         11-5/2                                                                                                                        12-1 1/2                                                                                                                       13-16 1/3                                                                                                                       yw!

4 km = m help please​

Answers

Answer:

4000m

Step-by-step explanation:

km to m --> multiply by 1000

4km * 1000 = 4000m

there two pics so plz do not make me waste my points

Answers

Answer:

top right one

Step-by-step explanation:

If the radius of a circle is 10cm, what will be the area of the circle?

Answers

Answer:

314

Step-by-step explanation:

Answer:

a

Step-by-step explanation:

PLEASE HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

She needs to sell 15 boxes of cookies to reach her goal


The point (-3, 2) is on the line given by which equation below?
HELPPP ME PLSSSS I NEED THIS NOWW

Answers

The answer is c. you can also check this by simply plugging in the x and y values.
In this case:
2=-3+5
2=2

The length of a movie is 1 hour 45 minutes. Mary has already watched the first 55 minutes. How many more minutes does the movie last?

Answers

Answer: 50 minutes

Change 1 hour 45 minutes into minutes by adding 60 to 45.

60 + 45 = 105

Shes watched 55 minutes so we subtract that from 100 to get our answer

105 - 55 = 50

There would be 50 minutes left of the movie
Explanation: 1 hour 45 mins is equal to 105 minutes, 105-55= 50, hope this helps :)

I need the answer pls

Answers

Answer:

B?

Step-by-step explanation:

I feel like the answer would be b but I'm not that good with fractions so don't choose my answer right away...

Neveah orders a square pizza. 34 34 of the pizza has pepperoni. 23 23 of the pepperoni also has green peppers. How much of the whole pizza has both pepperoni and green peppers

Answers

Answer:

1/2

Step-by-step explanation:

Given that:

3/4 of pizza has pepperoni

2/3 of the pizza with pepperoni has green pepper ;

The fraction of the whole pizza that has both pepperoni and green pepper ;

Fraction with pepperoni = 3/4

Fraction of whole with green pepper and pepperoni : 2/3 of 3/4 = 2/3 * 3/4 = (2*3) / (3*4) = 6/12 = 1/2

Find the value or measure. Round answers to the nearest tenth, as needed.

Answers

Answer:

its 34

Step-by-step explanation:

its half of the center angles

Jimmy has 360 baseball cards in his collection. Of these, 2/9 are Braves baseball players. How many of jimmys baseball cards are Braves Baseball Players

Answers

Answer: 80 of jimmys baseball cards are Braves Baseball Players

Step-by-step explanation:

2/9 of 360 is 80

I did 2/9 x 80

which are not the length of sides of a right​

Answers

Answer:

D.

Step-by-step explanation:

all numbers except d are pythagorean triples, hope this helps!!

I’m pretty sure it’s b

Please help what does x=?

Answers

Answer:

x = 25

Explanation:

If 9 is in the middle of the triangle, then the base of the triangle has to be twice as that. If you did 9•2, you’d get 18. But if you added 7, you’d get 25.

Help pleaseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

Answers

Answer:

21

Step-by-step explanation:

Answer: Our required answer is 11(2c+3d)

Step-by-step explanation:

Since we have given that

22c + 33d.

We have to use "Distributive property" to factor out the greatest common factor.

Since we know that 11 is the greatest common factor of 22 and 33.

So, it becomes,11(2c+3d)

Hence, our required answer is 11(2c+3d)

What is the length of segment QV?

32 units
36 units
40 units
44 units

Answers

Answer:

44

Step-by-step explanation:

because i just did the test

The length of the segment in the given figure is 44 units.

Consider triangle STR and ΔQTR.

We have to find the length of QV.

∠TRQ = ∠TRS = 90°

TR = TR (Common)

SR = RQ (Given)

So, ΔTSR ≅ ΔTQR ( By SAS Congruence Criterion)

So, By CPCT (Correspondence part of congruent triangle)

TS = TQ

2x+8=40

2x=32

Divide both sides by 2

x=16

Now segment QV=3x-4

3(16)-4

48-4=44 units

To learn more on Triangles click:

https://brainly.com/question/2773823

#SPJ7

The temperature in Minnesota was -8°F one day. On the same day, the temperature was 12° higher in Indiana. What was the temperature in Indiana that day? 26 POINTS !

Answers

-8 + 12 is 4° zhdjsndjensbd

Mr. Ramsey's science students are going on a field trip. He teaches 116 students. They will be nding in vans that seal 18 students. Hou marry vans are needed to transport the students? ​

Answers

Answer:

6 vans

Step-by-step explanation:

If 1 van can seal 18 students...

116 ÷ 18 = 6.4

Since it's not a whole number, we will estimate it to the nearest whole number which is 6.

Answer: you need seven vans


NEED HELP!!!!

Please

Answers

Answer:

# 1,3 and 6

Step-by-step explanation:

i’ll give brainliest if someone can help

Answers

Answer:

Step-by-step explanation:

Surface Area = 4πr²

Volume = 4/3 πr³

VOLUME

4/3 *6³ *π=

4/3 *216π

216/3 = 72*4 = 288π

SURFACE AREA

4*π*6²=

4*36π=

144π

Overall the answer should be C.

Please help me I don’t understand this

Answers

You need to find the total surface area of the rectangular prism. The top and bottom are 8(6), which equals 48. Since we want both the top and bottom, multiple 48 by 2 to get 96. The we need to calculate the remaining 4 sides. Two of them are 15(6), which is 90. Again, multiply by two since there’s two of those sixes to get 180. Finally, the last two sides are 15(8), which is 120. Add all of these numbers together to get 96+180+120=396. So she will need 396 cm^2 of fabric.


Your stock is worth $50 in 2010. Each year the value increased by 5%. Write a function to
model this situation. Use y to represent the value of the stock and x to represent the number of years since 2010

Answers

Answer:

It adds by +5

Step-by-step explanation:

The fabric is $3 times the number of yards of fabric n. Which equation gives the total cost c of n yards of fabric

Answers

Answer:

C = 3n

Step-by-step explanation:

Given that,

The fabric is $3 times the number of yards of fabric n.

We need to find an equation that gives the total cost c of n yards of fabric.

It means, the total cost of n yards of fabric is given by :

C = 3n

Where

n is yards of fabric.

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