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Geometry_Word_Problems/316753: the surface area of a right circular cylinder with a circular radius r and a height h is given by s= 2 pie r squared. explain why his is so. then find how much cardboard is needed to make a toilet paper tube if the tube is 4.5 inches long with a radius of 1 inch 1 solutions Answer 226795 by Fombitz(13828)   on 2010-06-23 11:08:06 (Show Source): You can put this solution on YOUR website! Imagine a cardboard tube. Cut the tube lengthwise and unroll it. The tube is now unrolled and flattened into a rectangle. The length of the rectangle is along the cut line, . The width of the rectangle is the circumference of the circle or . The area of the rectangle is Your surface area formula would only be correct if sq.in. or approximately, sq.in.

Linear-equations/316880: How to write an equation in slope- interception form for a line psassing through each pair of points? 1 solutions Answer 226794 by Fombitz(13828)   on 2010-06-23 10:53:05 (Show Source): You can put this solution on YOUR website! Use the points to calculate the slope. Then use either point (xp,yp), the slope , and the point-slope form of a line, Then convert to slope-intercept form,

Average/316870: If a+b=7(c+d), what would be the average (arithmetic mean) of a, b, c and d? 1 solutions Answer 226792 by Fombitz(13828)   on 2010-06-23 10:49:50 (Show Source): You can put this solution on YOUR website!

Equations/316876: Please help me with this. Find the distance between P and Q and the coordinates of the midpoint of the segment joining P and Q. P(2,7),Q(4,1) 1 solutions Answer 226790 by Fombitz(13828)   on 2010-06-23 10:45:16 (Show Source): You can put this solution on YOUR website! Use the distance formula, . . . Use the midpoint formula, (,) . . .

Equations/316879: Please help me with this question. Identify the vertex of the parabola. f(x)= (x-9) square + 10 1 solutions Answer 226788 by Fombitz(13828)   on 2010-06-23 10:42:59 (Show Source): You can put this solution on YOUR website! Compare to the general vertex form for a parabola with vertex (h,k): . . . (,)=(,)

test/316877: Solve each system by the addition method. 2x+3y=18 5x-y=11 1 solutions Answer 226786 by Fombitz(13828)   on 2010-06-23 10:41:40 (Show Source): You can put this solution on YOUR website! 1. 2. Multiply eq. 2 by (3) and add to eq. 1, Then use either equation to solve for y.

Graphs/316872: Write the standard form (ax+by=c) of the equation of the line with the following conditions. 1. Through: (1,2) Slope; 7 What i have tried: i have tried to graph it. i used the slope. And after that i got lost, because i dont understand the question itself. HELP, please ? 1 solutions Answer 226784 by Fombitz(13828)   on 2010-06-23 10:38:46 (Show Source): You can put this solution on YOUR website! Use the point slope form of the line,, then convert to standard form,

Equations/316874: Please help me with this. Find the center and radius of the circle. x square - 4x + y square - 12y + 36=0 1 solutions Answer 226782 by Fombitz(13828)   on 2010-06-23 10:35:51 (Show Source): You can put this solution on YOUR website! Complete the square in x and y. Compare to the general equation for a circle centered at (h,k) with a radius R, . . . Center:(,) Radius:

Equations/316786: Solve. Ann Cobb lives 20 miles due north of her favorite radio station. While driving due east from her house , she was able to keep the radio signal for 75 miles. What is the broadcasting range of her favorite radio station? 1 solutions Answer 226780 by Fombitz(13828)   on 2010-06-23 10:33:36 (Show Source): You can put this solution on YOUR website! The 20 miles north from her house and the 75 miles east from her house are legs of a right triangle. The hypotenuse of the right triangle is the distance from the radio station and its range. Use the Pythagorean theorem, or approximately, miles

Square-cubic-other-roots/316857: The problem is ... - the square root of 27 plus 6 times the square root of 3......i need this answer in the simplest radical form. 1 solutions Answer 226777 by Fombitz(13828)   on 2010-06-23 10:28:32 (Show Source): You can put this solution on YOUR website!

Average/316869: if 5a+5b=45, what is the average(arithmetic mean) of a and b? 1 solutions Answer 226776 by Fombitz(13828)   on 2010-06-23 10:27:22 (Show Source): You can put this solution on YOUR website! . . . The average of and is

Probability-and-statistics/316832: A silver dollar is flipped twice. Calculate the proability of each of the following occurring: a) a head on the first flip b) a tail on the second flip given that the first toss was a head c) two tails d) a tail on the first and a head on the second e) a tail on the first and a head on the second or a head on the first and a tail on the second e) at least one head on the two flips 1 solutions Answer 226775 by Fombitz(13828)   on 2010-06-23 10:26:01 (Show Source): You can put this solution on YOUR website! a) Look at the 2 possible outcomes. H T P(H)=1/2 . . b) Look at the 2 possible outcomes. H H H T P(T)=1/2 . . c)Look at the 4 possible outcomes. H H H T T H T T P(T,T)=1/4 . . d)Look at the 4 possible outcomes. H H H T T H T T P(T,H)=1/4 . . e) From d) P(T,H)=1/4 P(H,T)=1/4 P(T,H or H,T)=1/4+1/4=1/2 . . f) P(at least one head)+P(all tails)=1 P(at least one head)=1-P(T,T) P(at least one head)=1-1/4 P(at least one head)=3/4

Probability-and-statistics/316826: Solve the following system of equations using the inverse matrix method. x+3y=6 x-2z=-1 3y+z=5 X= y= z= 1 solutions Answer 226771 by Fombitz(13828)   on 2010-06-23 10:15:05 (Show Source): You can put this solution on YOUR website! [A]= [x]= [b]= . . . det[A]= . . . [A]inv= . . [x]=

Surface-area/316867: 1 solutions Answer 226770 by Fombitz(13828)   on 2010-06-23 10:09:42 (Show Source): You can put this solution on YOUR website! Please re-post.

test/316859: Write the quadratic function in the form y = a(x - h)2 + k. Find the veertex, axis of symmetry, domain and range y = -2x^2 - 8x - 5 1 solutions Answer 226769 by Fombitz(13828)   on 2010-06-23 10:09:19 (Show Source): You can put this solution on YOUR website! The vertex of the parabola is (-2,3). The axis of symmetry is . The domain is unlimited: (,). Since the coefficient for is negative, the parabola opens downward, and the vertex is the maximum value. The range is (,). . . .

Equations/316784: Solve. A 10 meter ladder is leaning against a building. The bottom of the ladder is 5 meters from the building. How many meters high is the top of the ladder? 1 solutions Answer 226768 by Fombitz(13828)   on 2010-06-23 09:59:47 (Show Source): You can put this solution on YOUR website! The ladder, the distance from the ladder base to the building, and the distance from the ground to the ladder on the building form a right triangle. Use the Pythagorean theorem, or approximately, m

test/316860: Determine whether there is a maximum or minimum value for the given function, and find that value. f(x) = x^2 + 8x + 13 1 solutions Answer 226766 by Fombitz(13828)   on 2010-06-23 09:54:55 (Show Source): You can put this solution on YOUR website! Convert to vertex form by completing the square, The minimum value occurs at the vertex. . . .

Linear-systems/316818: Please help factor and solve: Show steps (x+3)(2x-1)=5 1 solutions Answer 226762 by Fombitz(13828)   on 2010-06-23 09:38:38 (Show Source): You can put this solution on YOUR website!

Geometry_Word_Problems/316853: One angle of a triangle measures 12 degrees.The second angle's measurement is five times the third.What is the measure of the third angle? 1 solutions Answer 226760 by Fombitz(13828)   on 2010-06-23 09:34:30 (Show Source): You can put this solution on YOUR website! The sum of the angles in a triangle is, degrees . . degrees

Geometry_Word_Problems/316814: The measurement of angle ABD and angle CBD are in the ratio 2:3. If the measurement of angle ABC is 70, what is the measurement of angle ABD and angle CBD? 1 solutions Answer 226759 by Fombitz(13828)   on 2010-06-23 09:32:18 (Show Source): You can put this solution on YOUR website! ABD: degrees CBD: degrees

Probability-and-statistics/316821: A box contains seven more nickels than quarters. How many nickels are there if the total value is $2.75? 1 solutions Answer 226758 by Fombitz(13828)   on 2010-06-23 09:28:15 (Show Source): You can put this solution on YOUR website! 1. 2. Substitute eq. 1 into eq. 2, Then from eq. 1, There are 15 nickels.

real-numbers/316834: One angle of a triangle is four times as large as the smallest angle. The third angle is 60 degrees larger than the smallest angle. What is the measure of the angle? 1 solutions Answer 226757 by Fombitz(13828)   on 2010-06-23 09:25:42 (Show Source): You can put this solution on YOUR website! Let A be the smallest angle. The sum of the angles in a triangle sum to, . . . . . . .

Polynomials-and-rational-expressions/316827: factor 5w^2-14w-3 1 solutions Answer 226756 by Fombitz(13828)   on 2010-06-23 09:23:02 (Show Source): You can put this solution on YOUR website!

Geometry_Word_Problems/316849: The height of a triangle is four times the length of the base.Find the base and height of the triangle if the area is 18 square inches. 1 solutions Answer 226755 by Fombitz(13828)   on 2010-06-23 09:22:05 (Show Source): You can put this solution on YOUR website!

Inequalities/316836: 3(x-2)-1<2-5(x+6) 1 solutions Answer 226754 by Fombitz(13828)   on 2010-06-23 09:20:16 (Show Source): You can put this solution on YOUR website!

Coordinate-system/316803: Find an equation of the line containing the given pair of points. 1/6,-1/3 and 5/6,5 1 solutions Answer 226753 by Fombitz(13828)   on 2010-06-23 09:12:42 (Show Source): You can put this solution on YOUR website! Use the points to find the slope. Then use either point and the point-slope form of a line, . . .

Geometry_Word_Problems/316778: Dan and Frank are roommates. They both leave their house on their bicycles at the same time. Dan rides west for 4 miles and then south for 3 miles. Frank rides east for 1 mile and then north for 2 miles. How far apart are they when they both arrive at their destinations? 1 solutions Answer 226751 by Fombitz(13828)   on 2010-06-23 09:07:40 (Show Source): You can put this solution on YOUR website! Let east be positive x, west negative x, north positive y, south negative y. They both start at (0,0). Dan travels to (-4,-3). Frank travels to (1,2). To calculate the distance between them, use the distance formula. or approximately, miles

Equations/316767: Which of the following expressions is equivalent to 20 - 4/5 x >= 16 ? a.x<=5 b.x>=5 c.x>=32 1/2 d.x<=32 1/2 Please explain and show work 1 solutions Answer 226750 by Fombitz(13828)   on 2010-06-23 09:04:02 (Show Source): You can put this solution on YOUR website! . . . a) is the correct answer.

logarithm/316765: please help me solve for x,y,z 2x+2y-z=8 2x+y+3z=0 x-2y+2z=-2 1 solutions Answer 226749 by Fombitz(13828)   on 2010-06-23 09:01:09 (Show Source): You can put this solution on YOUR website! You didn't specify a method to use. I used matrix inversion, where

Probability-and-statistics/316838: Ok I am stumped on this question: The rate of return of a Fortune 500 company over the past 15 years are: 3.17%; 4.43%; 5.93%; 5.43%; 7.29%; 8.21; 6.23%; 5.23%; 4.34%; 6.68%; 7.14%; -5.56%;-5.23%; - .73%; -10.34% This is what i did: 0.0317 0.0443 0.0593 0.0543 0.0729 0.0821 0.0623 0.0523 0.0434 0.0668 0.0714 -0.0556 -0.0523 -0.0073 -0.1034 mean =0.028146667 the answer the professor has is .0248 don't know what i am doing wrong any help would be appreciated. 1 solutions Answer 226748 by Fombitz(13828)   on 2010-06-23 08:57:53 (Show Source): You can put this solution on YOUR website! I'm stumped too. I get the same answer as you. Are you sure the data values are correct and one of the digits isn't transposed? Your answer is pretty close.

Equations/316766: Please help me. Identify the vertex of the parabola. f(X)=(x-9)Square Divided by 10 Thanks 1 solutions Answer 226747 by Fombitz(13828)   on 2010-06-23 08:55:02 (Show Source): You can put this solution on YOUR website! The equation is in vertex form, where (h,k) is the vertex. Comparing, (h,k)=(9,0) . . .