3*6.022*10^23 no of molecules in 3.0 moles of sucrose
Answer: 25x² - 64
<u>Step-by-step explanation:</u>
(5x + 8)(5x - 8)
= 5x(5x - 8) + 8(5x - 8)
= 25x² - 40x + 40x - 64
= 25x² + 0x - 64
= ![\large\boxed{25x^2-64}](https://tex.z-dn.net/?f=%5Clarge%5Cboxed%7B25x%5E2-64%7D)
NOTE: descending powers means the biggest exponent goes first, then the next biggest exponent, etc.
For example: x⁴ then x³ then x² then x then the number (which is actually x⁰)
Question 1.). Solve:
2 (x - 1 / 2) = 3 (5 - 2x)
Simplify both sides of equation:
2( x - 1 / 2 ) = 3(5 - 2x )
(2) (x) + (2) ( -1 / 2 ) = (3) (5) + (3) ( -2x )
Distribute:
2x + - 1 = 15 + -6x
2x - 1 = -6x + 15
Add 6x to both sides:
2x - 1 + 6x = -6x + 15 + 6x
8x - 1 = 15
Add 1 to both sides:
8x - 1 + 1 = 15 + 1
8x = 16
Divide both sides by 8:
8x / 8 = 16 / 8
Answer: 2 (x - 1 / 2) = 3 (5 - 2x) ==========> x = 2
Question 2.).
M =======> Amount Malik need
Solution: =========> m ≥ 5
Inequality ========> 8 + 7 + 10 + m ≥ 30
25 + m ≥ 30
Interpretation ==========> Malik needs at least, $5 .00 to get to, $30.00 or more.
Is the solution reasonable ===========> YES
Hope that helps!!!!! : )
<em>Answer is x + 12</em>
<em />
<h2>
Explanation:</h2>
Hello! Recall that you have to write clear questions in order to get exact answers. So I'll help you assuming that the two expressions are the following:
First expression:
![2x+9](https://tex.z-dn.net/?f=2x%2B9)
Second expression:
![x-3](https://tex.z-dn.net/?f=x-3)
So the operation we need to perform is:
![2x+9-(x-3)](https://tex.z-dn.net/?f=2x%2B9-%28x-3%29)
Recall some rules:
![(+)\times (+)=+ \\ \\ (-)\times (-)=+ \\ \\ (-)\times (+)=- \\ \\ (+)\times (-)=-](https://tex.z-dn.net/?f=%28%2B%29%5Ctimes%20%28%2B%29%3D%2B%20%5C%5C%20%5C%5C%20%28-%29%5Ctimes%20%28-%29%3D%2B%20%5C%5C%20%5C%5C%20%28-%29%5Ctimes%20%28%2B%29%3D-%20%5C%5C%20%5C%5C%20%28%2B%29%5Ctimes%20%28-%29%3D-)
Hence:
![2x+9-(x-3)=2x+9-x+3 \\ \\ \\ Combine \ like \ terms: \\ \\ (2x-x)+(9+3) \\ \\ \boxed{x+12}](https://tex.z-dn.net/?f=2x%2B9-%28x-3%29%3D2x%2B9-x%2B3%20%5C%5C%20%5C%5C%20%5C%5C%20Combine%20%5C%20like%20%5C%20terms%3A%20%5C%5C%20%5C%5C%20%282x-x%29%2B%289%2B3%29%20%5C%5C%20%5C%5C%20%5Cboxed%7Bx%2B12%7D)
<h2>Learn more:</h2>
Simplify: brainly.com/question/1291365
#LearnWithBrainly
Quotient means division
-36/-4 + 9 = x
9 + 9 = x
18 = x