All categories

3 years ago

Really need help...

Mathematics

1 answer:

Andre45 [30]3 years ago

4 0

Sinθ = 16/20 = 0.8
θ = arcsin(0.8) ≅ 53°
:::::
Use ^2 to represent ².
Pythagorean identity:
sin²(x) + cos²(x) = 1

You might be interested in

I've been workin and workin and kept on gettin 21...but the answer key says 27. If yea could help and explain this I'd surely lo

lilavasa [31]

q/3 - 3 =6

add 3 to each side

q/3 = 9

multiply both sides by 3

q = 9 *3 = 27

7 0

3 years ago

Type the correct question of the line

Pepsi [2]

The correct equation of the line is Y=-2x-1 :)

7 0

1 year ago

For their homecoming parade, the students of U-Math have created a colorful banner, 57 meters in length, that is made of two

BartSMP [9]

Answer:

$Length\ of\ the\ long\ piece=40\ meters\\\\Length\ of\ the\ short\ piece=17\ meters$

Step-by-step explanation:

Let be "s" the length in meters of the short piece and "l" the lenght in meters of the long piece.

Set up a system of equations:

$\left \{ {{s+l=57} \atop {s=l-23}} \right.$

Apply the Substitution Method to solve the system. Substitute the second equation into the first equation and solve for "l":

$(l-23)+l=57\\\\2l=80\\\\l=\frac{80}{2}\\\\l=40$

Susbstitute the value of "l" into the second equation in order to find the value of "s". This is:

$s=40-23\\\\s=17$

6 0

3 years ago

Peggy had three times as many quarters as nickels. She had $1.60 in all. How many nickels and how many quarters did she have?. .

Andru [333]

Let

n-------> the number of nickels

q------> the number of quarters

we know that

$1\ quarter=\$0.25\\1\ nickel=\$0.05$

$0.05n+0.25q=1.60$ ----> equation A

$q=3n$ ----> equation B

substitute equation B in equation A

$0.05n+0.25[3n]=1.60$

$0.05n+0.75n=1.60$

$0.80n=1.60$

$n=2$

Find the value of q

$q=3*2=6$

therefore

<u>The answer part a) is</u>

the number of nickels are $2$ and the number of quarters are $6$

<u>the answer Part b) is</u>

The expressions that represents the number of quarters is

$q=3n$

5 0

3 years ago

Read 2 more answers

What is 482 students to 20 teachers?

fredd [130]

I really don’t know

8 0

3 years ago

Read 2 more answers