It doesn’t tell me what to put
Answer:
b = 2, GH = 9
Step-by-step explanation:
In this problem we have that

Solve for GH
-----> equation A
we have
-----> equation B
------> equation C
-----> equation D
step 1
Substitute equation D in equation C and solve for b




step 2
Find the value of GH
substitute equation B and equation D in equation A


substitute the value of b

Answer:
1/2
Step-by-step explanation:
He could type 3 3/7 in one hour.I think this because since it is 1/3 you would have to multiply it by 3.So you multiply 1/3 by 3,It would give one hour.When you multiply 1 1/7 by 3 it would give you 3 3/7.
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