Express 28% as a (a) fraction in its lowest terins,

Anyone know? Will mark brainliest!

Slav-nsk [51]

Answer:

I believe than answer is A make sure tho im only in 6 th grade

Step-by-step explanation:

4 0

4 years ago

Read 2 more answers

Find all the solutions in there interval (0,2pi) for cos5x=-1/2

oee [108]

Answer:

$\frac{2\pi}{15},\frac{4\pi}{15},\frac{8\pi}{15},\frac{2\pi}{3},\frac{14\pi}{15}, \frac{16\pi}{15}, \frac{4\pi}{3},\frac{22\pi}{15}, \frac{26\pi}{15}, \frac{28\pi}{15}$

Step-by-step explanation:

Solving trigonometric equations.

We are given a condition and we must find all angles who meet it in the provided interval. Our equation is

$cos5x=-\frac{1}{2}$

Solving for 5x:

$5x=\frac{2\pi}{3}+2n\pi$

$5x=\frac{4\pi}{3}+2n\pi$

The values for x will be

$x=\frac{\frac{2\pi}{3}+2n\pi}{5}$

$x=\frac{\frac{4\pi}{3}+2n\pi}{5}$

To find all the solutions, we'll give n values of 0, 1, 2,... until x stops belonging to the interval $(0,2\pi)$

For n=0

$x=\frac{\frac{2\pi}{3}}{5}=\frac{2\pi}{15}$

$x=\frac{\frac{4\pi}{3}}{5}=\frac{4\pi}{15}$

For n=1

$x=\frac{\frac{2\pi}{3}+2\pi}{5}=\frac{8\pi}{15}$

$x=\frac{\frac{4\pi}{3}+2\pi}{5}=\frac{2\pi}{3}$

For n=2

$x=\frac{\frac{2\pi}{3}+4\pi}{5}=\frac{14\pi}{15}$

$x=\frac{\frac{4\pi}{3}+4\pi}{5}=\frac{16\pi}{15}$

For n=3

$x=\frac{\frac{2\pi}{3}+6\pi}{5}=\frac{4\pi}{3}$

$x=\frac{\frac{4\pi}{3}+6\pi}{5}=\frac{22\pi}{15}$

For n=4

$x=\frac{\frac{2\pi}{3}+8\pi}{5}=\frac{26\pi}{15}$

$x=\frac{\frac{4\pi}{3}+8\pi}{5}=\frac{28\pi}{15}$

For n=5 we would find values such as

$x=\frac{\frac{2\pi}{3}+10\pi}{5}=\frac{32\pi}{15}$

$x=\frac{\frac{4\pi}{3}+10\pi}{5}=\frac{34\pi}{15}$

which don't lie in the interval $(0,2\pi)$

The whole set of results is

$\frac{2\pi}{15},\frac{4\pi}{15},\frac{8\pi}{15},\frac{2\pi}{3},\frac{14\pi}{15}, \frac{16\pi}{15}, \frac{4\pi}{3},\frac{22\pi}{15}, \frac{26\pi}{15}, \frac{28\pi}{15}$

6 0

4 years ago

Find the solution y+2x=17 y=x+2

Pavel [41]

Answer:

x=5, y=7. (5, 7).

Step-by-step explanation:

y+2x=17

y=x+2

-------------

x+2+2x=17

3x+2=17

3x=17-2

3x=15

x=15/3

x=5

y=5+2=7

4 0

3 years ago

You spending $144 for new sweaters,T-Shirts and pants.Sweaters cost $28,T-Shirts (t) cost $14 and pants (p) cost $23,each.Which

zepelin [54]

28s + 14t + 23p = 144

5 0

3 years ago

Identify all of the radii circle o

Olegator [25]

Answer:

The radii are OA , OB and OC

Explanation:

The radius of the circle is defined as the line joining between the center of the circle and a point that lies on the circumference of the circle

In the given circle:

The center is "O"

The three points that lie on the circumference are A, B and C

Based on the above definition, the three radii would be:

OA, OB and OC

Hope this helps :)

4 0

4 years ago