All categories

2 years ago

Can someone help me with this

Mathematics

1 answer:

Tems11 [23]2 years ago

4 0

Answer: 8.2

Step-by-step explanation:

As angles in a triangle add to 180 degrees,

$\angle A=180^{\circ}-121^{\circ}-31^{\circ}=28^{\circ}$

So, by the Law of Sines,

$\frac{a}{\sin A}=\frac{b}{\sin B}\\\\a=\frac{b \sin A}{\sin B}\\\\a=\frac{9 \sin 28^{\circ}}{\sin 31^{\circ}}\\\\a \approx \boxed{8.2}$

You might be interested in

Briana bought a lot of snacks from Dollar General last night for $193.84, not including tax. If the tax rate was 9%, how much di

lina2011 [118]

Answer:

17.4456 Pretty sure they want you to round up not sure

Step-by-step explanation:

I like to divide by 100 the get the rate for 1% and then multiply by the actual number in your case 9 you can use a calculator for this to make it easy and you can get it pretty simple this usually works for all percent's if you have multiple like 9.74 use the lowest percent .04 that way you can use it to find the rest I hope this helps :) lmk if you want me to explain more

7 0

3 years ago

Segment addition postulate What’s the answer?

Free_Kalibri [48]

$\bf Step-by-step~explanation:$

Keep in mind: The entire line segment (VX) is equal to 14.

$\bf Step~1:$

Let's see how the line segment looks like first.

Line segment VX is 14 units long.

______________

V X

W is on the line segment somewhere, and VW is equal to 3.

3 ?

______________

V W X

$\bf Step~2:$

We have to solve for the ?. Let's put ? as x. So now we are solving for x.

We have to set up our equation like this:

x + 3 = 14

Since our unknown value plus 3 is equal to 14, we have to subtract 3 from 14 to get our answer.

14 - 3 = 11

3 11

______________

V W X

$\large\boxed {\bf Our~final~answer: ~WX=11}$

3 0

2 years ago

Subtraia do quadrado de 3/4,o cubo de 1/2.que resultado encontrara

vova2212 [387]

A resposta para esta equação é 7/16.

5 0

3 years ago

Read 2 more answers

Use Distributive Property to write an equivalent expressions 7(x+6)

malfutka [58]

Answer:

7x+42

Step-by-step explanation:

4 0

3 years ago

Plane traveled 1120 miles each way to Munich and back. The trip there was with the wind. It took 10 hours. The trip back was int

kotegsom [21]

Answer:

84 mph and 28 mph

Step-by-step explanation:

Let the speed of plane is p and speed of the wind is w.

Then we have:

10*(p + w) = 1120 ⇒ p + w = 112
20*(p - w) = 1120 ⇒ p - w = 56

Sum the two equations and solve for p:

p + w + p - w = 112 + 56
2p = 168
p = 84

Find w:

84 + w = 112
w = 112 - 84
w = 28

6 0

2 years ago