Whst number is 20% higher than 30

Answers

Answer 1

Answer: 20/100 * 30 = 6
30 + 6 = 36

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When x = 3 and y = 5, by how much does the value of 3x^2 – 2y exceed the value of 2x^2 – 3y ?F. 4 G. 14 H. 16 J. 20 K. 50
This refers to relationships among and between variables. It has a value between -1 and 1 that indicates direction and strength. It is usually denoted with 'r'.
Please explain the connection between Pythagorean triples and right triangles. Please help and thanks
The weather forecast states that the temperature will be lower than -5*F tonight. Let t represent the temperature in degrees Fahrenheit. Which inequality models the situation.A. t < -5 and t may be a negative numberB. t < -5 and t must be a positive numberC. t > -5 and t may be a negative numberD. t > -5 and t must be a positive number
WHAT IS 5/8 PAGE IN 2/3 OF A MINUTE

The speed of a stream is 4 mph. A boat travels 8 miles upstream in the same time it takes to travel 16 miles downstream. what is the speed of the boat in still water

Answers

Answer

Find out the speed of the boat in still water .

To proof

Let us assume that the speed of the boat in still water be u .

As given

The speed of a stream is 4 mph

hence

speed upstream = u - 4

speed downstream = u + 4

Formula

$Time = (Distance)/(speed)$

As given

A boat travels 8 miles upstream in the same time it takes to travel 16 miles downstream.

First case for the upstream

$Time = (8)/(u - 4)$

Second case for the downstream

$Time = (16)/(4 + u)$

now compare the equations

$(8)/(u - 4) = (16)/(u + 4)$

simplify the equation

8( u +4 ) = 16 (u -4)

8u +32 = 16u - 64

8u = 96

$u = (96)/(8)$

u = 12 mph is the speed of the boat in still water .

Hence proved

The speed of the stream = 4 mph.

Let us assume speed of the boat in still water = x mph.

Total speed upstream = (x-4) mph.

Total speed downstream = (x+4) mph.

We know, time, speed and distance relation.

Time = Distance / Speed.

Total time taken upstream = 8 / (x-4)

Total time taken downstream = 16/(x+4).

Time taken upstream = time taken downstream.

Therefore,

8 / (x-4) = 16/(x+4).

On cross multiplication, we get

16(x-4) = 8(x+4).

16x - 64 = 8x +32.

Adding 64 on both sides, we get

16x - 64+64 = 8x +32+64

16x = 8x + 96.

Subtracting 8x from both sides, we get

16x-8x = 8x-8x + 96.

8x = 96.

Dividing both sides by 8, we get

x = 12.

Therefore, 12 mph is the speed of the boat in still water.

What shape has 10 sides

Answers

That would be a decagon. A way to remember that is that you know a decade equals 10 years so you can remember the shape by decagon

A decagon has 10 sides and 10 angles.
Hope this helps!!

Explain how to write the equation of a line if you know its y-intercept and the equation of a line to which it is parallel? btw i need this answer asap (0_0)
THANK YOU PEOPLE OF THE WORLD

Answers

If you use the equation y = mx+b then you already know what the b term is because you have the y intercept. For the m (slope) you take the slope of the other line and use that because since there parallel they are going to run at the same angle (slope). Hope this helped. If you have any questions just ask.

What are the factor pairs of 75??I already did 1 × 75, so...

they need to be multiplication sentences though. for example: 1 × 75 = 75.

:)

Answers

15×5=75 is one factor pair

10x5 would probaly work, i hope i helped.....

What is the point-slope form of the equation of a line that passes through the point (1, 4) and has a slope of −3?A. Y - 1 = -3 (X - 4)

B. Y + 4 = 3(X + 1)

C. Y + 4 = -3 (X + 1)

D. Y - 4 = -3 (X - 1)

Answers

The point slope form equation is: y – y1 = m(x – x1)

Then just plug in the numbers:
Y – 4 = -3 ( x – 1) ANSWER D

mark has 312 books in his bookcases she has 11 as many fiction books as nonfiction books how many fiction books does mark have?

Answers

11 as many fiction books as non fiction.

Fiction books F, Non Fiction NF

F: NF = 11 : 1

Total ratio 11+ 1 = 12.

Fraction of Fiction books F, = 11/12

Total books = 312.

Fiction books = 11/12 * 312 = 286

Fiction books = 286

286 = answer

good homworks.

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