Y= 18 because vertical angles are congruent.
Let x represent the total cost, so i have this equation:
x=5c+12. Hope it help!
Hello,
This is simple :)
<span>First divide:
How many times does 16 go into 7? : 0
7 GOES into 16, 0 times, now we have ; 0.
Next, multiply 16(0):0
Now, subtract 7-0
=7
Bring 0 down... so now we have 70... how many times can you divide 16 into 70? : about 4 times.
Now we have: 0.4
Multiple 16 by 4
= 64 : SUBTRACT 64 from 70
=60
Bring Down: 0; this gives us 60.
Divide:
How many times can 16 go into 60? : About 7 times
No we have : 0.437..
Bring down 0; gives us 600: how many times can 16 go into 600?: About 5 times.
Now, we have 0.4375.
Thus, 7/16 = 0.4375.
Faith xoxo
</span>
Answer:
1) The student didn't add copper sulfate but instead he added calcium carbonate.
2) The heated solution should be left to get bigger crystals and should not be instantly allowed to evaporate.
3) He should use copper carbonate not calcium carbonate.
4) Sulfuric acid was added instead of hydrochloric acid.
5) Add solid excessively so that all of the acid is retained.
6) Filter the solution to remove unreacted solid.
7) Heat gently, so the crystals will start to appear.
