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3 years ago

Its that time of day :D plz help with math

Mathematics

2 answers:

konstantin123 [22]3 years ago

6 0

Answer:

Step-by-step explanation:

4 11

aleksandrvk [35]3 years ago

3 0

Answer:

4/15

Step-by-step explanation:

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Identify the congruent angles in the figure. Explain your reasoning.

cupoosta [38]

Answer:

Step-by-step explanation:

<CBD is congruent to <ABE by Vertical Angles

<ABC is congruent to <DBE by Vertical Angles

6 0

3 years ago

Sally has been measuring the tree in her yard for a science project. The tree has grown 1/2 of an inch each month and gotten a t

Studentka2010 [4]

4 months because, 2 divided by 0.5 is 4 therefore she has been measuring the tree for 4 months

8 0

3 years ago

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How do you integrate arctan(x dx? i think that if you simplify the integral you get:?

Temka [501]

Integration by parts will help here. Letting $u=\arctan x$ and $\mathrm dv=\mathrm dx$ , you end up with $\mathrm du=\dfrac{\mathrm dx}{1+x^2}$ and $v=x$ . Now

$\displaystyle\int\arctan x\,\mathrm dx=uv-\int v\,\mathrm du$
$\displaystyle\int\arctan x\,\mathrm dx=x\arctan x-\int\frac x{1+x^2}\,\mathrm dx$

For the remaining integral, setting $y=1+x^2$ gives $\dfrac{\mathrm dy}2=x\,\mathrm dx$ , so

$\displaystyle\int\frac x{1+x^2}\,\mathrm dx=\frac12\int\frac{\mathrm dy}y=\frac12\ln|y|+C=\frac12\ln(1+x^2)+C$

Putting everything together, you end up with

$\displaystyle\int\arctan x\,\mathrm dx=x\arctan x-\frac12\ln(1+x^2)+C$

6 0

3 years ago

Does somebody know how to find area of a trapizoid???

motikmotik

Answer:

To find the area of a trapezoid, multiply the sum of the bases (the parallel sides) by the height (the perpendicular distance between the bases), and then divide by 2.

Step-by-step explanation:

:) Hope this helps you with what you're working on!

5 0

2 years ago

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Approximately how many of the world’s volcanoes occur along the Ring of Fire? 60 to 70 percent 70 to 80 percent 80 to 90 percent

d1i1m1o1n [39]

Answer:

About 70 to 80%

Step-by-step explanation:

About 70 to 80% of the world total volcanoes occur along the fire ring, The ring of fire is present near the pacific ocean the countries like Chile ,Japan and the island which are present near the pacific ocean are come under the fire ring , the ring of fire is very active in nature this is the reason most of the volcanoes and earthquakes occur here

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3 years ago