Questions on Geometry: Geometric formulas answered by real tutors!

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Question 835872: What is the equation a plane containing these vertices? Choose 1
2x + 3y + z = 6
3x + 2y + 6z = 6
2x + 6y + 3z = 6

6x + 3y + 2z = 6

Click here to see answer by Fombitz(32388)

Question 836440: I have been ill and have missed several weeks of school. I am trying to catch up now that I am home from the hospital via email. My pre-cal/trig teacher sent me several homework assignments, but I am so behind that I do not now how to do these problems. Can you help with this one and maybe I can use it as an example? I am supposed o evaluate using principle values of the inverse relations.
The problem: cos(2 arc cos 5/6)
Thank you so much!!!
Click here to see answer by rothauserc(4718)

Question 836438: I have been ill and have missed several weeks of school. I am trying to catch up now that I am home from the hospital via email. My pre-cal/trig teacher sent me several homework assignments, but I am so behind that I do not now how to do these problems. Can you help with this one and maybe I can use it as an example? I can use a calculator on these problems.
The problem: tan{arc tan 1/2 + arc tan 1/3]
Thank you so much!

Click here to see answer by josmiceli(19441)

Question 836712: When producing 1/2 inch bolts for a car, the tolerance is 0.003 inch. What is the range of acceptable bolt measures?
Click here to see answer by richard1234(7193)

Question 838241: A machine can cup 1800 bottles in one hour. There are 200000 bottles to be capped. How long will it take the 2 machines to do the capping together?
Click here to see answer by LinnW(1048)

Question 838910: prove that the diagonals of a rectangle are congruent (use coordinate geometry)
Click here to see answer by Theo(13342)

Question 839741: find the equation of the line that contains the point (-1,7) and has a slope that is undefined.
what is the equation of the line??
Click here to see answer by Theo(13342)

Question 840309: I have two questions so thanks to anyone who answers them
Plz provide steps as well as I have been stuck on these problems for quite a while
A garden has a perimeter of 72 ft and an area of 360. What are the length and width?
If Home Depot sells 2x4 for $15.25 a yard how much will it cost to design a border for the walkway which has a length of 45 feet and a width of 1 foot
Click here to see answer by Alan3354(69443)

Question 839804: the explicit formula for the geometric sequence 15, 3, 0.6, 0.12

Click here to see answer by Fombitz(32388)

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Click here to see answer by mathhelper123(14)

Question 843879: Find the surface area of a truncated cube. The original cube had edge length= 24in. Use the square root of 3. Answer to the nearest tenth of a square inch.
Click here to see answer by smith123(15)

Question 843739: infinity + x = infinity(a larger one)
infinity - x = infinity
infinity * x = infinity
infinity / x = infinity unless x = infinity
infinity^x = infinity
Now wouldn't squaring infinity give you an infinitely large square? Wouldn't cubing infinity give you an infinitely large cube? What about with those other formulas for area and volume, would you get an infinitely large shape that the formula was for in the first place? I am assuming that in this geometric way infinity is an infinitely large line segment to start off with.
Click here to see answer by Fombitz(32388)

Question 846049: a rancher has 100 meters of fencing to enclose two adjancet rectangular corrals. the rancher wants the enclosed area to be 350 square meters. what dimensions shoul the rancher use to obtain this area?
Click here to see answer by psbhowmick(878)

Question 846281: find the coordinates of the centroid p of /\abc
A(-1,2), B(5,6), C(5,-2)
Click here to see answer by Fombitz(32388)

Question 847926: Find the coordinates of the centroid of the triangle with vertices A(5,1), B(1,2) and C(6,3). Show your work or explain your answer.
Click here to see answer by Fombitz(32388)

Question 848086: The line through the points(-3,-1) and (0,5) is parallel to the line through which of the following points?
a. (1,-3) and (2,-1)
b. (1,-3) and (3,3)
c. (1,-3) and (3,-2)
d. (1,-3) and (3,-3)
Click here to see answer by swincher4391(1107)

Question 848119: what is an equation of the line that is parallel to the x axis and passes through the point 2,3
Click here to see answer by josmiceli(19441)

Question 848321: The base of a triangle is 2cm more than the height. The base is increased by 4cm while the height is the same. The new area is 56cm. Whats the original area?

Click here to see answer by swincher4391(1107)

Question 848283: If the tub holds 90.5 liters of water, what is the size of the tub in cubic centimeters
Click here to see answer by Ash14(5)

Question 850770: I need help answering which of the following is the equation of a line that passes through (-2,-1)and (-4,-3)
Click here to see answer by rothauserc(4718)

Question 852028: The length of the sides of a triangle are given as 8, 15, and 17. The hypotenuse is the side that is of length______?
Thank you so much for your help
Click here to see answer by fcabanski(1391)

Question 852026: Find the area A and the circumference C of a circle of radius 4 meters
Thank you so much for your help
Click here to see answer by Seutip(231)

Question 852029:

How many feet does a wheel with a diameter of 17 inches travel after five revolutions?
Thank you so much for your help
Click here to see answer by checkley79(3341)

Question 852031: Use the fact that the radius of Earth is 3960 feet and 1 mile is 5280 feet to answer the following question:
From the top of a 22-ft tower on a submarine, a person can see approximately ____ miles? Please round to the nearest hundredth.
Thank you so much for your help
Click here to see answer by Alan3354(69443)

Question 852413: I cannot wrap my brain around word problems. Please help me!!
How much water must be evaporated from 16 oz of a 2% salt solution to make a 4% salt solution?
To obtain a solution that is 4% salt solution, ____ oz of water must be evaporated.
Thank you in advance
Click here to see answer by josgarithmetic(39617)

Question 852414: Here is another headache for me!
A motorboat maintained a constant speed of 20 miles per hr relative to the water in going 24 miles upstream and the returning. The total time for the trip is 2.5 hours.
Use this information to find the speed of the current.
Please help. I really need an answer.
Click here to see answer by josgarithmetic(39617)

Question 852417: The last questions for tonight. Please help me.
Suppose that you wanted to mix 2 coffees to get 100 lbs of the blend. If x represents the number of lbs of coffee A, write an algebraic expression that represents the number of of coffee b.

Click here to see answer by Alan3354(69443)

Question 852415: Please help
A winery has a vat with 2 pipes leading to it. The inlet pipe can fill the vat in 7 hours while the outlet pipe can empty in 10 hours.
How long will it take to fill the vat if both pipes are left open?

Click here to see answer by ankor@dixie-net.com(22740)

Question 853753: Could somebody please show me how to make (a) the subject in A=h(a+b)/2
Click here to see answer by josgarithmetic(39617)

Question 853842: How do you solve for (k) F=Pk-kH+k
Click here to see answer by josgarithmetic(39617)

Question 854161: Could somebody please go through the steps to solve for (C) R=(Ax+C)/Y
Click here to see answer by harpazo(655)

Question 854161: Could somebody please go through the steps to solve for (C) R=(Ax+C)/Y
Click here to see answer by josgarithmetic(39617)

Question 854189: Can someone please explain all the steps of how to solve for (b) X=a+(b+2)w. I have seen several examples now but I still don't understand.
Click here to see answer by aditya2117(32)

Question 854943: If I am solving for (k) F=Pk-kH+k and the answer is F/(P-H+1)=k. Why is it (P-H+1)
Click here to see answer by rothauserc(4718)

Question 854954: If I am solving for (b) X=a+(b+2)w and the answer is b=X-(a+2w)/w. I understand up to the step where we get b=X-a/w-2 but I don't understand how to get (a+2w)/w
Click here to see answer by rothauserc(4718)

Question 855606: Please help me with this question: An artist used silver wire to make a triangle that has a perimeter of 30 inches. Shen then used copper wire to make the largest circle that could fit in the triangle.
how many more inches of silver wire did the artist use compared to copper wire?
Click here to see answer by KMST(5328)

Question 856123: how do i solve for f(x)=81-x^2
Click here to see answer by Theo(13342)

Question 858299: A semicircle is situated on top of a rectangle so that the diameter (straight edge) is touching with the shorter side of the rectangle. The radius of the semicircle is 'r' and the perimeter of the whole shape is 6m.
The question asks to find the formula for 'A' (Area of whole shape) in terms of 'r'.
This was all the info give, hopefully that is enough. There was a diagram in the original question.

Click here to see answer by rothauserc(4718)

Question 859032: the sum of the first and the third terms of a geometric progression is 40. the sum of the second and the fourth terms is 120. Determine the first term and the common ration of the progression.
Click here to see answer by mananth(16946)

Question 859437: please help to solve the following
the sum of the first and the third terms of a geometric progression is 40. the sum of the second and the fourth terms is 120. Determine the first term and the common ratio of the progression.
Click here to see answer by mananth(16946)

Question 860925: x+y=4 is the perpendicular bisector of AB where A=(3,-3). Find B.
Click here to see answer by josgarithmetic(39617)

Question 805057: If a =bc/2+ 3c writ a formula for c.
Click here to see answer by tommyt3rd(5050)

Question 826538: x+h/xh - 2+h/h
Click here to see answer by tommyt3rd(5050)

Question 799406: If 2x+6(x-4)=136 what would be the type of theorem?
Click here to see answer by tommyt3rd(5050)