The domain of the function is expressed as D = (-∞, ∞)
The domain of a function is the value of the input 'x' for which the given function exists.
Given the function f(x)= 1/2x^2 +11x +15;
- the domain of the function exists on all real numbers.
- That is the function will exist for any given value of x.
Hence the domain of the function is expressed as D = (-∞, ∞)
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Answer:
Step-by-step explanation:
A) looks pretty good
1. Each segment is the hypotenuse of a 3-4-5 right triangle, so is length 5. The four segments lengths add to 20 units (B).
2. Half the perimeter is 9.47, so the perimeter rounded to the nearest unit will be 19 units (C).
The sides parallel to the x-axis are 5 units long. The slanted sides have a rise of 4 for a run of 2, so are √(2^2 +4^2) = √20 ≈ 4.47 units long. Then the perimeter is 2(5 +4.47) = 18.94 ≈ 19.
We can only solve equations (i.e. with an equal sign).
We simplify equations, hope that's what you want.
(15x^2+45)/(50x)
=15x^2/(50x) + 45/(50x)
=3x/10 + 9/(10x)
Note that parentheses are required for numerators and denominators when multiplication, addition or subtractions are involved.
Answer: 11 magazines
Step-by-step explanation:
1) 20/5 = $4 per magazine
2) 44/4 = 11 magazines