3 years ago

If i am twice the age of my sister but she is 10 years young then my brother who is 36 how old am I

Mathematics

2 answers:

Elena L [17]3 years ago

8 0

Is the answer possibly 30?

andrew11 [14]3 years ago

6 0

52 you are 52 years old

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Use the Law of Cosines to find the missing angle. In triangle JKL, j=3in., k=4in., and l=2.89., find mJ

slega [8]

Using the law of cosine for Triangle KJL, we can write:

$j^{2} = k^{2} + l^{2}-2(k)(l)cos(J) \\ \\ 
2(k)(l)cos(J)=k^{2} + l^{2}- j^{2} \\ \\ 
cos(J)= \frac{k^{2} + l^{2}- j^{2}}{2(k)(l)}$

Using the values of k,j and l, we can write:

$cos(J)= \frac{ 4^{2} + (2.89)^{2} - 3^{2} }{2(4)(2.89)} \\ \\ 
cos(J)= 0.664 \\ \\ 
J= cos^{-1}(0.664) \\ \\ 
J=48.39$

Rounding to nearest integer, the measure of angle J will be 48 degrees.
So option B gives the correct answer

8 0

2 years ago

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Plz help me i dotn know this

miv72 [106K]

Answer:

it's D. I think 105 cubic feet

3 0

3 years ago

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Problem: – 12 = - Зу

Rzqust [24]