Answer:
Area: 
Step-by-step explanation:
Since all sides of a square have equal lengths, the area of the square is 
(a = length of a side).
Since the length of the side of the square is given (is 3cm), the area of the square is 
= 
If you would like to solve 16x^2 - 81 = 0, you can calculate this using the following steps:
<span>16x^2 - 81 = 0
</span>(4x - 9) * (4x + 9) = 0
1. 4x - 9 = 0 ... 4x = 9 ... x = 9/4
2. 4x + 9 = 0 ... 4x = - 9 ... x = - 9/4
The correct result would be: <span>x = 9 over 4, x = −9 over 4.</span>
I believe his brother is 4 at the moment, since 4*3 is 12. in 4 years John will be 16 and his brother will be 8, and 8 is half of 16. so 16?
Answer: 78 ounces of dough
Step-by-step explanation:
Total ounces used for a person:
= 6 + 4
= 10 ounces of both dough and sauce
Ounces of dough used will therefore be:
= 6/10 * 130
= 78 ounces of dough
Taking natural logs of both sides, we get
0.015t=ln 3
t = ln 3/0.015 = 73.24
The answer is 73.24 years.
