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3 years ago

Typing 1,000 words in 15 minutes

Mathematics

1 answer:

r-ruslan [8.4K]3 years ago

7 0

In 15 minutes, he writes 1 000 words, and you can fit 15 minutes in 1 hour four times

1 000 x 4 = 4 000.

The write can write 4 000 words in an hour.

315

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Dan was at the beach for five days and found 28 seashells. He plans to give all of his seashells equally to his four friends. Ho

bekas [8.4K]

7 is the correct answer your welcome

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3 years ago

Angles α and β are the two acute angles in a right triangle. Use the relationship between sine and cosine to find the value of β

Dimas [21]

Answer:

From given relation the value of β is 37.5°

Step-by-step explanation:

Given as :

α and β are two acute angles of right triangle

Acute angle have measure less than 90°

Now given as :

$sin(\frac{x}{2} + 2x)$ = $cos(2x +\frac{3x}{2})$

Or, $cos(90° - (\frac{x}{2}+2x))$ = $cos(2x +\frac{3x}{2})$

SO, $(90° - (\frac{x}{2}+2x))$ = $2x+\frac{3x}{2}$

Or, 90° = $2x+\frac{3x}{2}$ + $\frac{x}{2}+2x$

or, 90° = $\frac{4x}{2}$ + 4x

Or, 90° = $\frac{12x}{2}$

So, x = $\frac{90}{6}$ = 15°

∴ $sin(\frac{x}{2} + 2x)$ = $sin(\frac{15}{2} + 30)$

So, $sin(\frac{x}{2} + 2x)$ = sin $\frac{75}{2}$

∴ The value of Ф_1 = $\frac{75}{2}$ = 37.5°

Similarly $cos(2x +\frac{3x}{2})$ = $cos(30 +\frac{45}{2})$

So ,The value of Ф_2 = $\frac{105}{2}$ = 52.5°

∵ β α

So, As 37.5°52.5°

∴ β = 37.5°

Hence From given relation the value of β is 37.5° Answer

7 0

3 years ago

CAN SOMEONE PLEASE HELP ME???

Varvara68 [4.7K]

Answer:

m=2

Step-by-step explanation:

slope is the average rate of change in a specific interval

we can calculate slope in this case with Δy/Δx or (y2-y1)/(x2-x1)

m=(y2-y1)/(x2-x1)

=(-1-7)/(-3-1)

=-8/-4

5 0

2 years ago

Write the slope-intercept form of the question of the line through the given point with the given slope.

Alexxx [7]

Answer:

y=x

Step-by-step explanation:

Slope intercept form of a line

y = mx+b

m is the slope

y = 1x+b

Substitute in the point

1 = 1*1+b

1 = 1+b

Subtract 1 from each side

1-1 =1-1+b

0=b

y = 1x

y=x

8 0

3 years ago

What is x^2 equal to? (Please don't tell me it is a graph) Is it equal to -x, 2x, or something?

Lera25 [3.4K]

$x^{2}$ is equal to 2x, since it is the derivative of $x^{2}$ .

3 0

3 years ago