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maw [93]
2 years ago
12

The midpoint of AB is M(6, 3) . If the coordinates of A are (7, 4) , what are the coordinates of B?

Mathematics
1 answer:
timofeeve [1]2 years ago
8 0

Answer:

5,2

Step-by-step explanation:

the difference between a and m is 1,1 so 1,1 subtracted from the mid point(M) would be 5,2

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A water tower is formed by joining two hemispheres to a cylinder and removing the flat surfaces at the ends. The volume needs to
Mrac [35]
Wait what?
removing the flat surfaces...
... oh!
I get it

okey dokey
basicaly find the shape that gives you a volume of 200 cubic meters and and minimizes the amount of materials needed to make the conainer


find the volume
we can take the 2 hemispheres and combine them to get 1 sphere
we can take the cylinder as well
vsphere=(4/3)pir^3
vcylinder=hpir^2
so total volume would be (4/3)pir^3+hpir^2


now find surface area which is the amount of sheet metal we will need to construct it
surface area=lateral area of cylinder+surface area of sphere
lateral area of cylinder=2pirh
surface aea of sphere=4pir^2 
total surface area=2pirh+4pir^2
but, the hemishpere part costs 3 times more
so just say the cylinder part costs 1 dollar per square meter and hemisphere part costs 3 dollars so we mutiply hemishpere part by 3 to get
SAcost=2pirh+12pir^2



so we got
v=200=hpir^2+4/3pir^3
solve for h since the r exponents are tricky
h=\frac{200-\frac{4}{3} \pi r^3}{\pi r^2}
subsitute that for h in the other equation
SAcost=2pirh+12pir^2
SAcost=2 \pi r (\frac{200-\frac{4}{3}\pi r^3}{\pi r^2})+12 \pi r^2
now we simpilify and take the derivitive to find the value of r where SAcost is a minimum
we get at that the derivitive of SAcost is 0 at r=\sqrt[3]{\frac{150}{7 \pi}}
by subsituteion we find that the value of h will be then h=\frac{4(7 \pi -1)\sqrt[3]{7350}}{21\sqrt[3]{\pi}}

aproximately
the radius should be about 1.8964m and the height should be about 53.0789m
5 0
3 years ago
Michael has 14 video games that he no longer plays. Five of the video games do not work. If he wants to sell the working video g
AleksandrR [38]

Answer:108 dollars

Step-by-step explanation:14-5= 9 working video games. 9×12=108.

6 0
3 years ago
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Stu is riding his bike at a steady pace of 11 miles per hour. Write an equation to model how far he travels on his bike x after
kondaur [170]

Answer:

you in jacksonville

Step-by-step explanation:

6 0
3 years ago
Can someone help me with these two questions I’m 10 points
GalinKa [24]

(1) answer for this question is 6/51 to 1

(2)the answer for this question is (d)58.50

4 0
2 years ago
Expand. Your answer should be a polynomial in standard form. (x2+4)(x2−6)=(x^2+4)(x^2-6)=(x2+4)(x2−6)=
Dafna11 [192]

Answer:

x^4 -2x^2 -24

Step-by-step explanation:

(x^2+4)(x^2−6)

FOIL

First: x^2*x^2 = x^4

Outer: x^2 *-6 = -6x^2

Inner: x^2 *4 = 4x^2

Last: 4*-6 = -24

Add them together

x^4 -6x^2 +4x^2 -24

Combine like terms

x^4 -2x^2 -24

This is in standard form since the powers decrease

8 0
2 years ago
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