Answer:
39.9 rounded to 40 degrees
Step-by-step explanation:
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Answer:
-n^2 - 5n + 24
Step-by-step explanation:
Let the number be n.
Then the sum of that number and 3 is n+3.
The difference of 8 and the number is 8 - n.
Then we get the expression (n + 3)(8 - n).
Performing the indicated multiplication, we get:
8n - n^2 + 24 - 3n, or
-n^2 - 5n + 24
Nothing more can be done, as this is not an equation, but rather an expression.
These are the only numbers you can multiply to get to 18.
1x18
2x9
3x6
18x1
9x2
6x3
Solve for x over the real numbers:
x^3 (x^2 - 4) = 0
Split into two equations:
x^3 = 0 or x^2 - 4 = 0
Take cube roots of both sides:
x = 0 or x^2 - 4 = 0
Add 4 to both sides:
x = 0 or x^2 = 4
Take the square root of both sides:
Answer: x = 0 or x = 2 or x = -2
