3 years ago

Pls help i’ll mark as brainliest

Mathematics

1 answer:

stepan [7]3 years ago

6 0

Answer:

It is 39.3

Step-by-step explanation:

You find the circumference using the formula 2πr so you get 20π.

and then you multiply that by 225/360 bc 360 is how much the whole circle is and the 225 part is the part you want to solve.

So 20π*225/360 is about 39.3

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Law of cosines.Anyone good in Trigonometry?

marin [14]

Answer:

$c=11.8\ units$

Step-by-step explanation:

we know that

The formula of law of cosines is equal to

$c^2=a^2+b^2-2(a)(b)cos(C)$

where

a, b and c are sides. C is the angle opposite side c

In this problem we have

$a=3\ units\\b=10\ units$

$C=120^o$

substitute the given values

$c^2=3^2+10^2-2(3)(10)cos(120^o)$

$c^2=109-(60)cos(120^o)$

$c^2=109-(60)(-0.5))$

$c^2=109+30$

$c^2=139$

$c=11.8\ units$

3 0

2 years ago

FREE BRAINLIEST!: (n+2) to the power of 2 - 5a + 1 when n=6 and a=2

BlackZzzverrR [31]

Answer:

Step-by-step explanation:

2−5+1+8

11−5

i add 8 because n is 6 so add 2 it is 8 so i put it in the problem and got 55

have a nice day and sorry if wrong T_T

6 0

2 years ago

The cylinder is 10 meters wide and the volume is 300 cubic meters what's the height of the cylinder?

daser333 [38]

Cylinder is 10 meters wide, so its diameter is 10 meters. You get radius of it by dividing 10 by 2, which equals 5.
As you count volume of cylinder from that equation
$V=A*h= \pi r^{2}*h$
You get an equation to count height:
$h= \frac{V}{ \pi r^{2} }$
h≈3.82 meters

4 0

3 years ago

Fawzia has two summer jobs. During the week she works in the grocery store, and on the weekend she works at a nursery. She gets

kumpel [21]

Answer:

In total she works 21 hours and for the equation its gn=g+n

Step-by-step explanation:

got the equation i just put gn but that can be replaced with 21 since g and n both represent the number of hours fawzia works

8 0

2 years ago

A middle school took all of its 6th grade students on a field trip to see a play at a theater that has 4600 seats. The students

ahrayia [7]

Answer:

4232

Step-by-step explanation:

92% x 4600

4232

7 0

2 years ago