Explanation and help completely lost

Mathematics

2 answers:

Tomtit [17]3 years ago

4 0

Hello.

The find the measure of side c, you should use the Law of Sines. This law states, sin A / a = sin B / b = sin C / c. Since you are given two angle measures and the measure of a side, you can substitute these values into sin B / b = sin C / c.

Here are the given values: sin B = 105 degrees, sin C = 15 degrees, side b = 2 cm.

sin (105) / 2 = sin (15) / c (multiply both sides by c)

sin (105) / 2 · c = sin (15)

0.48296... · c = 0.25881... (divide both sides by 0.48296)

c = 0.53588..

The value of side c is about 0.5 centimeters.

Digiron [165]3 years ago

3 0

Not sure about explanation I just added 105 and 15 and subtracted from 180 to get 70 you can try that.

You might be interested in

Please help me with this!!

jeka94

Answer:

I think it is 3.

Step-by-step explanation:

4 0

3 years ago

Daniel had 80 more stickers than Elle. He gave 1/4 of his stickers to Elle. She then gave 3/5 of her stickers to Daniel. In the

Pepsi [2]

Answer:

Daniel had 108 stickers at first

Step-by-step explanation:

Number of Daniel's stickers = d

Number of Elle's stickers = e

Since Daniel had 80 more stickers than Elle, d = 80 + e

e = d - 80

Daniel gave 1/4 of his stickers to Elle, Daniel is left with (d - d/4) = 3d/4

Elle now has e + d/4 = d - 80 + d/4 = (5d/4) - 80 = (5d - 320)/4

Elle now gave 3/5 of her remaining stickers to Daniel:

Elle now has:

$e_{new} = \frac{5d -320}{4} - \frac{3}{5} * \frac{5d -320}{4}\\\\e_{new} = \frac{5d -320}{4} - \frac{15d -960}{20}\\\\e_{new} = \frac{25d - 1600 - 15d + 960}{20} \\\\ e_{new} = \frac{10d-640}{20}$