Step-by-step explanation:
2+2=4 so 4
Answer:
2x=1
Step-by-step explanation:
The subtraction property of inequality can be used to proof that x = 7 from x + 8 = 15
<h3>What is an
equation?</h3>
An equation is an expression that shows the relationship between two or more variables and numbers.
Given that x + 8 = 15
Hence:
x + 8 - 8 = 15 - 8 (subtraction property of inequality)
x = 7
The subtraction property of inequality can be used to proof that x = 7 from x + 8 = 15
Find out more on equation at: brainly.com/question/2972832
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Answer:
x⁵+ 45x⁴+ 810x³+ 7290x²+ 32805x +59049
Step-by-step explanation:
Greetings !
Given expression
![(x + 9) {}^{5}](https://tex.z-dn.net/?f=%28x%20%2B%209%29%20%7B%7D%5E%7B5%7D%20)
write 5 as a sum
![(x + 9) {}^{3 + 2}](https://tex.z-dn.net/?f=%28x%20%2B%209%29%20%7B%7D%5E%7B3%20%2B%202%7D%20)
![use \: a {}^{m + n} = a {}^{m} \times a {}^{n} to \: expand \: the \: expression.](https://tex.z-dn.net/?f=use%20%5C%3A%20a%20%7B%7D%5E%7Bm%20%2B%20n%7D%20%20%3D%20a%20%7B%7D%5E%7Bm%7D%20%20%5Ctimes%20a%20%7B%7D%5E%7Bn%7D%20to%20%5C%3A%20expand%20%5C%3A%20the%20%5C%3A%20expression.)
![(x + 9) {}^{3} \times (x + 9) {}^{2}](https://tex.z-dn.net/?f=%28x%20%2B%209%29%20%7B%7D%5E%7B3%7D%20%20%5Ctimes%20%28x%20%2B%209%29%20%7B%7D%5E%7B2%7D%20)
Use (a+b)³=a³+3a²b+b³ to expand the expression
![(x {}^{3} + 27x {}^{2} + 243x + 729) \times (x + 9) {}^{2}](https://tex.z-dn.net/?f=%28x%20%7B%7D%5E%7B3%7D%20%20%2B%2027x%20%7B%7D%5E%7B2%7D%20%20%2B%20243x%20%2B%20729%29%20%5Ctimes%20%28x%20%2B%209%29%20%7B%7D%5E%7B2%7D%20)
Use (a+b)²=a²+2ab+b² to the second expression to expand it
![(x {}^{3} + 27x {}^{2} + 243x + 729) \times(x {}^{2} + 18x + 81)](https://tex.z-dn.net/?f=%28x%20%7B%7D%5E%7B3%7D%20%20%2B%2027x%20%7B%7D%5E%7B2%7D%20%20%2B%20243x%20%2B%20729%29%20%5Ctimes%28x%20%7B%7D%5E%7B2%7D%20%20%2B%2018x%20%2B%2081%29)
Finally, simplify the expression gives
![x {}^{5} + 45x {}^{4} + 810x {}^{3} + 7290x {}^{2} + 32805x + 59049](https://tex.z-dn.net/?f=x%20%7B%7D%5E%7B5%7D%20%20%2B%2045x%20%7B%7D%5E%7B4%7D%20%20%2B%20810x%20%7B%7D%5E%7B3%7D%20%20%2B%207290x%20%7B%7D%5E%7B2%7D%20%20%2B%2032805x%20%2B%2059049)
Hope it helps!
Answer:
<h2>A. 1</h2>
Step-by-step explanation:
Use:
|a| = a for a ≥ 0 or |a| = -a for a < 0
PEMDAS:
P Parentheses first
E Exponents
MD Multiplication and Division (left-to-right)
AS Addition and Subtraction (left-to-right)
========================================
|8 - 7| · 4 + 3(-1)
= |1| · 4 - 3
= 1 · 4 - 3
= 4 - 3
= 1