Answer:
3x - 2 = 4x + 5
3x - 4x = 2 + 5 (move the numbers with the variable x to one side, and the normal numbers to the other side. Switch the signs of the numbers you move. 4x became -4x and -2 became 2.)
-x = 7 (simply add the numbers)
x = 7
Answer:
a=3.5,d=0 and n=101
a
n
=a+(n−1)×d
a
n
=3.5+100×0
a
n
=3.5Step-by-step explanation:
Answer:
1.39 × 10^22 molecules of CO₂
Step-by-step explanation:
We are given;
We are required to calculate the number of molecules of CO₂
1 mole of a compound contains 6.022 × 10^23 molecules
- Thus, we can answer the question;
2.3 × 10^-2 moles will contain;
= 2.3 × 10^-2 moles × (6.022 × 10^23 molecules/mol)
= 1.386 × 10^22 molecules
= 1.39 × 10^22 molecules
Therefore, there are 1.39 × 10^22 molecules of CO₂
To complete the square, you would add to both sides (8/2)^2 = (4)^2 = 16. So, the correct answer would be D.
It appears like the 3 was distributed through the parenthesis