Given
The mass of a certain 10k gold necklace is 18 grams.
Find out how many grams of gold are in the necklace.
To proof
let us assume that the gold in the necklace be x.
As given in the question
10k gold necklace i.e gold necklace is made up of the various elements with the gold.
10k gold necklace is 18 grams.
As pure gold is of the 24k.
than the equation becomes
solving
x =7.5 gram
7.5 grams of gold are in the necklace .
Hence proved
Answer:
b. x=sin^-1(a/c)
c. x=tan^-1(c/a)
e. y=cos^-1(c/b)
Step-by-step explanation:
on edge!
I think the area would be 48?
Numbrs are divided in real and imaginary, so they can't be together one thing
Complex number are imaginary numbers
in the other hand if you multiply am complex by i than you get a real number, but that is just a way of expressing, so not all numbers are complex.
(5i)²=-25----- a real number is a product of 2 imaginary but it doesn't mean that we can say all are complex
(the explaination is subjectiv, based just in my opinion and knowlige hope it helps)
