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SCORPION-xisa [38]
3 years ago
9

¿Cuantos triángulos hay?

Mathematics
2 answers:
artcher [175]3 years ago
8 0

Answer:

18

Step-by-step explanation:

Fórmula:

\frac{a(a + 1)(b)}{2}  =  \frac{3(3 + 1)(3)}{2}  =  \frac{3(4)(3)}{2}  =  \frac{36}{2}  = 18

nalin [4]3 years ago
5 0

Answer:

Yo veo 16. tal vez sea mas...

Step-by-step explanation:

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exis [7]
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3 years ago
I made a 3.5 hour phone call, it cost $10. How much would 1 hour be?
Vlad1618 [11]

Answer:

1 hour would cost $0.35.

Step-by-step explanation:

Divide 3.5 by 10.

8 0
3 years ago
The circumference of a circle is 14 pi ft. Find its diameter, in feet
Valentin [98]

Answer:

14

Step-by-step explanation:

Please let me know if you want me to add an explanation as to why this is the answer/how I got this answer. I can definitely do that, I just wouldn’t want to write it if you don’t want me to :)

3 0
3 years ago
Read 2 more answers
How would I find the integral of <img src="https://tex.z-dn.net/?f=%5Cint%5Cfrac%7Btdt%7D%7Bt%5E4%2B2%7D" id="TexFormula1" title
kotegsom [21]
Let t=\sqrt y, so that t^2=y, t^4=y^2, and \mathrm dt=\dfrac{\mathrm dy}{2\sqrt y}. Then

\displaystyle\int\frac t{t^4+2}\,\mathrm dt=\int\frac{\sqrt y}{2\sqrt y(y^2+2)}\,\mathrm dy=\frac12\int\frac{\mathrm dy}{y^2+2}

Now let y=\sqrt2\tan z, so that \mathrm dy=\sqrt2\sec^2z\,\mathrm dz. Then

\displaystyle\frac12\int\frac{\mathrm dy}{y^2+2}=\frac12\int\frac{\sqrt2\sec^2z}{(\sqrt2\tan z)+2}\,\mathrm dz=\frac{\sqrt2}4\int\frac{\sec^2z}{\tan^2z+1}\,\mathrm dz=\frac1{2\sqrt2}\int\mathrm dz=\dfrac1{2\sqrt2}z+C

Transform back to y to get

\dfrac1{2\sqrt2}\arctan\left(\dfrac y{\sqrt2}\right)+C

and again to get back a result in terms of t.

\dfrac1{2\sqrt2}\arctan\left(\dfrac{t^2}{\sqrt2}\right)+C
3 0
3 years ago
The perimeter of a rectangular room is 52 feet. The length is 2 more than the width. What is the width of the room?
Otrada [13]

Answer:

10

Step-by-step explanation:

i think its 10 maybe cuz if u see

the perimeter of a rectangular room is 52 feet. right?

then then height is 2 more than the width. what is the width of the room? so am I right copying the question? yes the question is right copied ok!

now see when u subtract 2 from 12 it gives u 10 and length i as 2 more than the width so maybe 10

7 0
3 years ago
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