Answer:
cm
Step-by-step explanation:
The volume of the box is:
V = height * length * width
V = x*(66 - 2*x)*(90 - 2*x)
V = (66*x - 2*x^2)*(90 - 2*x)
V = 5940*x - 132*x^2 - 180*x^2 + 4*x^3
V = 4*x^3 - 312*x^2 + 5940*x
where x is the length of the sides of the squares, in cm.
The mathematical problem is :
Maximize: V = 4*x^3 - 312*x^2 + 5940*x
subject to:
x > 0
2*x < 66 <=> x < 33
In the maximum, the first derivative of V, dV/dx, is equal to zero
dV/dx = 12*x^2 - 624*x + 5940
From quadratic formula
![x = \frac{-b \pm \sqrt{b^2 - 4(a)(c)}}{2(a)}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B-b%20%5Cpm%20%5Csqrt%7Bb%5E2%20-%204%28a%29%28c%29%7D%7D%7B2%28a%29%7D%20)
![x = \frac{624 \pm \sqrt{(-624)^2 - 4(12)(5940)}}{2(12)}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B624%20%5Cpm%20%5Csqrt%7B%28-624%29%5E2%20-%204%2812%29%285940%29%7D%7D%7B2%2812%29%7D%20)
![x = \frac{624 \pm \sqrt{104256}}{24}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B624%20%5Cpm%20%5Csqrt%7B104256%7D%7D%7B24%7D%20)
![x = \frac{624 \pm \sqrt{2^6*3^2*181}}{24}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B624%20%5Cpm%20%5Csqrt%7B2%5E6%2A3%5E2%2A181%7D%7D%7B24%7D%20)
![x = \frac{624 \pm 8*3*\sqrt{181}}{24}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B624%20%5Cpm%208%2A3%2A%5Csqrt%7B181%7D%7D%7B24%7D%20)
![x_1 = \frac{624 + 24*\sqrt{181}}{24}](https://tex.z-dn.net/?f=x_1%20%3D%20%5Cfrac%7B624%20%2B%2024%2A%5Csqrt%7B181%7D%7D%7B24%7D%20)
![x_1 = 26 + \sqrt{181}](https://tex.z-dn.net/?f=x_1%20%3D%2026%20%2B%20%5Csqrt%7B181%7D)
![x_2 = \frac{624 - 24*\sqrt{181}}{24}](https://tex.z-dn.net/?f=x_2%20%3D%20%5Cfrac%7B624%20-%2024%2A%5Csqrt%7B181%7D%7D%7B24%7D%20)
![x_2 = 26 - \sqrt{181}](https://tex.z-dn.net/?f=x_2%20%3D%2026%20-%20%5Csqrt%7B181%7D)
But
, then is not the correct answer.
Answer :
<span>Unless we have a relationship defined between x and y there is no common factor apart from 1.
</span>
hope it helps
~Reema
The value of x is 84°.
Solution:
Measure of intercepted arc = 168°
Measure of angle x = ?
<u>Tangent-chord relationship:</u>
<em>If a tangent and a chord intersect at a point, then the measure of each angle formed is half of the measure of its intercepted arc.</em>
![$\Rightarrow \angle x = \frac{1}{2}\times 168^\circ](https://tex.z-dn.net/?f=%24%5CRightarrow%20%5Cangle%20x%20%3D%20%5Cfrac%7B1%7D%7B2%7D%5Ctimes%20168%5E%5Ccirc)
![$\Rightarrow \angle x = 84^\circ](https://tex.z-dn.net/?f=%24%5CRightarrow%20%5Cangle%20x%20%3D%2084%5E%5Ccirc)
The value of x is 84°.
Answer: $2227.41
Step-by-step explanation:
A = P(1 + r/n)^nt
59 is D
because with the point (-3,7) you substitute it into the equation, making it: 7=4x+b. solve for b. then you have y=4x+19. work out the algebra in the possible choices and whatever equals y=4x+19 will be the answer. in this case, its D.
60 is C
same as above, you do the algebra of the equation. bring the one over after doing distribution with the 4 and voila!
61 is A
a relatively easy one, all you do is the the slope -4 where m goes, and 3 where b goes. y= -4x+3
62 is C.
this one requires more work.
chose one of the points, in this case (2,7) and put them into the equation.
but wait, you need a slope!
you get that use the formula (y2-y1)/(x2-x1) which will be
(7-5)/(2-3) which will be
-2.
now you have y-7= -2(x-2)
voila!
63 is C. y= 1/2x+3
64 is B. (3, -5)
66 is B. negative. the line goes \ ( not / which is positive)
67 would be A. because it is positive and the I and the E are in the right places.
70 is C. 2/3. as before, remember we can but the points into this equation and have (6-4)/(3-0) which = 2/3
71 is D. y= 3x+10
72 is C. a third degree monomial
73 can't read
74 can't read
75 can't read.