3 years ago

Find the value of each variable using sine and cosine. Round your answer to the nearest tenth.

Mathematics

1 answer:

Mandarinka [93]3 years ago

8 0

Cos 36° = r/5

5*cos 36° = r

4.0450849719 = r

4.0 = r

sin 36° = s/5

5*sin 36° = s

2.9389262615 = s

2.9 = s

Done!

You might be interested in

Find the value of x in a triange..which x -10+2x+20+x+20

statuscvo [17]

ANSWER:

-10+2x+20+x+20

-10+20+20+2x+x

30 = 3x

10 = x

~batmans wife dun dun dun...

4 0

3 years ago

Read 2 more answers

Nick O’ Time, the plumber, charges $30 per hour. His brother Ivan, the plumber’s helper, charges $20 per hour. Nick starts worki

lianna [129]

Answer:

7 hours

They worked together for 7 hours ($350 + $120)

8 0

3 years ago

DIRECTIONS: Use this information to answer Parts A, B, and C.

Talja [164]

Answer:

V=706.85

Step-by-step explanation:

Well, first of when you want to find the volume of the cone you need to have a radius and hieght. And the radius is half the diameter, so divide the diameter into half: 10/2=5 in. and you already have the height so just plug in the numbers.

Formula: V= $\frac{1}{3}$ $\pi$ $r^{2}$ h ---> V= $\frac{1}{3}$ $\pi$ ( $5^{2}$ )(27)

And put the plugged in formula in your calculator and you'll find the answer!

V=706.85

I hope this helped.

3 0

2 years ago

Solve<br><br> 9x^2 + 42x + 49 = 0

svet-max [94.6K]

Because of the relatively large coefficients {9, 42, 49}, applying the quadratic formula would be a bit messy. Instead, I've chosen to "complete the square:"

9x^2 + 42x + 49 = 0 can be re-written as 9 [ x^2 + (42/9)x ] = -49

Dividing both sides by 9, we get [ x^2 + (42/9)x ] = - 49/9

Completing the square: [ x^2 + (42/9)x + (21/9)^2 - (21/9)^2 ] = -49/9

[ x + 21/9 ]^2 = 441/81 - 441/81 = 0

Then [ x + 21/9 ] = 0, and x = -21/9 (this is a double root).

3 0

3 years ago

PLSSSSS HELPPPPP MEEE I WILL GIVE BRIANLIEST!!

solong [7]

Answer:

$9 per hour

9(x)

x = no. of hours

8 0

3 years ago