All categories

3 years ago

It takes 20 minutes to cut a log into 5 equal-size pieces. How long will it take to cut a similar log into 3 equal-size pieces

Mathematics

2 answers:

Anna007 [38]3 years ago

4 0

Answer:

30mins

Step-by-step explanation:

Whitepunk [10]3 years ago

3 0

Answer:

12 minutes

Step-by-step explanation:

20/5=4

3*4=12

You might be interested in

Meaning of bench mark in math

mezya [45]

It mean benchmarks in out side of math
a criterion by which to measure something; standard; reference point

8 0

4 years ago

Please help me solve this problem.

schepotkina [342]

Answer:

Step-by-step explanation:

There is no solution

5 0

3 years ago

Read 2 more answers

If tan theta = 10/13 and cos theta > 0 then sin2theta is what ?

svetoff [14.1K]

$sin2\alpha = \frac{260}{269}$

Step-by-step explanation:

We have , $Tan\alpha = \frac{Perpendicular}{Base} = \frac{10}{13}$ ,

We know that $sin\alpha = \frac{Perpendicular}{Hypotenuse} = \frac{Perpendicular}{\sqrt[2]{(Perpendicualr)^{2} + (Base)^{2})} }$

Substituting values of P & B , $sin\alpha = \frac{10}{\sqrt{10^{2} + 13^{2}} } = \frac{10}{\sqrt{269} }$

Now , $sin2\alpha = 2sin\alpha cos\alpha = 2sin\alpha \sqrt{1 - (sin\alpha)^{2} }$

⇒ $sin2\alpha =$ $\frac{10}{\sqrt{269} }$ × $\sqrt{1 - (\frac{10}{\sqrt{269} })^{2} }$ ×2

⇒ $sin2\alpha = \frac{20}{\sqrt{269} }( \sqrt{\frac{269 - 100}{269} } )$

⇒ $sin2\alpha = \frac{20}{\sqrt{269} }( \sqrt{\frac{169 }{269} } )$

⇒ $sin2\alpha = \frac{260}{\sqrt{269} }( \sqrt{\frac{1}{269} } )$

⇒ $sin2\alpha = \frac{260}{269}$

6 0

3 years ago

What are the domain and range of the graph? Is the graph a function? Explain.

kumpel [21]

Answer:

Domain: -3 < x <2

Range: -4 < y < 5

Is the graph a function? No the graph isn't not, since the graph fails the vertical line test

8 0

3 years ago

What is the slope of the line 7x + 2y = 5

blondinia [14]

Answer:

-7/2

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers