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HACTEHA [7]
3 years ago
15

How to work the problem out

Mathematics
1 answer:
gulaghasi [49]3 years ago
8 0
Use the Law of Sines  (sina/A=sinb/B=sinc/C for any triangle)

x/sin90=12/sin19

x=12/sin19

x≈36.86  to nearest hundredth
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Round your answer to the nearest hundredth BC=?
miskamm [114]

Answer:

BC = 1.71

Step-by-step explanation:

well to start we have to know the relationship between angles, legs and the hypotenuse  in a right triangle

α = 70°

a: adjacent  = BC

h: hypotenuse = 5

sin α = o/h

cos α= a/h

tan α = o/a

we see that it has (angle, adjacent, hypotenuse)

we look at which meets those data between the sine, cosine and tangent

is the cosine

cos α = a/h

Now we replace the values ​​and solve

cos 70 = a/5

0.34202 = a/5

0.34202 * 5 = a

1.7101 = a

round to the neares hundredth

a = 1.7101 = 1.71

BC = 1.71

7 0
2 years ago
Simplify: 18q2−45q+25/9q2−25.
Svet_ta [14]

Answer:

\frac{(6q-5)}{(3q+5)}

Step-by-step explanation:

Given: \frac{18q^{2}-45q+25 }{9q^{2}-25 }

Factorizing the numerator and the denominator, we have:

18q^{2} - 45q + 25 = 18q^{2} - 30q - 15q + 25

                         = (3q - 5)(6q - 5)

and

9q^{2} - 25 = (3q - 5)(3q + 5)

So that,

\frac{18q^{2}-45q+25 }{9q^{2}-25 } = \frac{(3q-5)(6q-5)}{(3q-5)(3q+5)}

                 = \frac{(6q-5)}{(3q+5)}

Therefore,

\frac{18q^{2}-45q+25 }{9q^{2}-25 } = \frac{(6q-5)}{(3q+5)}

5 0
3 years ago
Please help me I don’t know how
Goryan [66]

Answer:

6 5/6

Step-by-step explanation:

8

- 1 1/6

We need to borrow from the 8

We will borrow 1 from the 8 and make it a 7.  The 1 will be written in the form 6/6

7 6/6

- 1 1/6

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

6  5/6

4 0
3 years ago
-. If 5 + 4 = 9, does (5 + 4) = 3 = 9 = 4? Why or<br> why not?
Serjik [45]

Answer:No because if you add 5 plus 4 you will get nine but when u subtract 5 from four you will get 1 so no it would not get you any of those

Step-by-step explanation:

7 0
3 years ago
Graph the inequality on the axes below. Plz help this is due tonight! I’ll give you brainliest!
Vlada [557]

Answer:

If written in Standard form this equation would be:

y \geq \frac{x}{3} + (-\frac{18}{3} )

Now i graphed this equation in Desmos and here is what i got:

Hope this helps!

5 0
2 years ago
Read 2 more answers
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