To solve for a variable, you need to get it (x) by itself.
x² - 14 + 31 = 63 Add 31 to -14
x² + 17 = 63 Subtract 17 from both sides of the equation
x² = 46 Square root both sides
x =

Check your work by plugging in

for x and then

.

² - 14 + 31 = 63 Square

46 - 14 + 31 = 63 Subtract 14 from 46
32 + 31 = 63 Add
63 = 63

² - 14 + 31 = 63 Square

46 - 14 + 31 = 63 Subtract 14 from 46
32 + 31 = 63 Add
63 = 63
So,
x is
and 
.
The answer is B
Not sure but sorry if wrong, I can explain how I got it if you want
Answer: it is 19.6 because it shows a resong
Step-by-step explanation:
Answer:
<em>The jar contains 156 grams of zinc</em>
Step-by-step explanation:
<u>Ratios</u>
Let's call
Z=gr of zinc
C=gr of copper
We know the ratio between them in a certain chemical is:

The jar of the chemical contains C=663 gr of copper. Calculate the grams of zinc by solving the above relation for Z:
Multiplying by C:

Substituting the value of C:

Z=156 gr
The jar contains 156 grams of zinc