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expeople1 [14]
3 years ago
13

Number 4, 5, 6, 7 please and thank you so much

Mathematics
1 answer:
nevsk [136]3 years ago
4 0
4) B.
No equation is given, so there is no "solution". The solution to f(x) = 0 is found where the graph crosses the x-axis. You have to read the graph to find these points as (-3, 0) and (2, 0), so "solutions" are -3, 2.

5) B.
All quadratic functions have two zeros. The two zeros for this function are identical (±0), so are usually counted as one (distinct) zero.

6) C.
(-b±√(b^2-4ac))/(2a) = (3±√(9+40))/2 = (3±7)/2 = {-2, 5}

7) B.
The product of the roots (-6) is the constant term. The sum of the roots (1) is the negative of the x-coefficient. You are looking for x^2 -1x -6 = 0
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If 1200 cm^2 of material is available to make a box with a square base and an open top find the largest possible volume of the b
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<span>s = side of square base </span>
<span>h = height of box </span>
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<span>S.A. = surface area or 1200 cm², s²
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<span>1200 = s² + 4sh </span>
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<span>v(s) = s²((1200 - s²)/(4s)) </span>
<span>v(s) = s(1200 - s²)/4 . </span>
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by derivating
<span>v'(s) = 300 - (3/4)s² </span>
<span>0 = 300 - (3/4)s² </span>
<span>-300 = (-3/4)s² </span>
<span>400 = s² </span>
<span>s = -20 and 20. </span>
again derivating
<span>v"(s) = -(3/2)s </span>
<span>v"(-20) = -(3/2)(-20) </span>
<span>v"(-20) = 30 </span>
<span>v"(20) = -(3/2)(20) </span>
<span>v"(20) = -30 </span>


<span>v(s) = 300s - (1/4)s^3 </span>
<span>v(s) = 300(20) - (1/4)(20)^3 </span>
<span>v(s) = 6000 - (1/4)(8000) </span>
<span>v = 6000 - 2000 
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4 0
3 years ago
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Answer:

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