3 years ago

PLeaSe HeLp MEH!

Mathematics

1 answer:

jok3333 [9.3K]3 years ago

3 0

An hour hand travels 30° every 60 minutes

30°/60=0.5° per minute.

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Wanting someone to help me with the procedures<br>n²+n=120<br><br>

Natali [406]

N^2 + n - 120 = 0

Quadratic formula
a = 1, b = 1, c = -120
n = [-1 plus or minus root(1^2 - 4(1)(-120))] / 2(1)
n = (-1 plus or minus root481)/2
n =(approximately) 10.5 or -11.5

4 0

4 years ago

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

2sin 2x =1 ( 0 < x 2π )

yuradex [85]

Answer:

17pie/12

Step-by-step explanation:

im sorry i don't have the pie sign

5 0

3 years ago

In a forested area, the number of trees, T can be expressed as a function of the initial number of trees planted. If the initial

Wewaii [24]

N = N (1+0.20)^5
o

Here, that'd be 10000(1.20)^5, or 24883 trees.

7 0

3 years ago

Logan and Claudia want to split a bag of fun-sized candy, and decide to use the divider-chooser method. The bag contains 100 Sni

cestrela7 [59]

Answer:

$2.80

Step-by-step explanation:

35 Snickers = $1.40

30 Milky Ways = $0.30

55 Reese's = $1.10

Value of bag:

$2.80

7 0

3 years ago