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Updated: 2014-10-04T23:29:47.689-05:00
2008-05-14T19:31:09.836-05:00
Hi, My scribe today is about that sheet that Mr . Harbeck told us to answer. The sheet I got was page 48 so if my questions are different than yours... too bad.2008-05-14T19:42:15.728-05:00
Geometric Problems 1. The length of the triangle is 3 times the width. the perimeter is 96 cm. Find the width and length. The sides are ____cm, _____cm. This is the diagram of the problem This is to be done in solving this problemlet x = w. align all sides and their labels. place the perimeter is equal to 96. add all the sides of the rectangle and place it beside the perimeter. then solve for xthis is the solution of x. x = 12. i substitute the sides' label beside it resulting 3x to be 3(12). then simplify it ( 3 (12) to 36) and place it above the given perimeter or total. add the simplified length of each side to check if the total will be the given perimeter.and to finish this problem, we must finish it by answering the simple question.The sides are 36 cm, 12 cm.Note: this is very important. you will lose most of the marks if this is not done.2. the length of a rectangle is 5m greater than the width. the perimeter is 150m. find the width and the length.simple sentence: the sides are ____m, _____m.diagram:align the sides with their labels beside them. include the perimeter under the line with its value 150 m far away beside it.this is the solution of the problem.then answer the simple sentence: the sides are 40m , and 35 m.3. the first side of a triangle is 8 m shorter than the second side. the third side is 45 times as long as the first side. the perimeter is 2 m. find the length of each side.the simple sentence is : the sides are ___m, ___m, ____m.diagram: this must be done to solve this problemthe solution of this problemfinish this problem by completing the simple sentence:the sides are 3m, 11m, 12m.4. the third side is 30 m shorter than twice the length of each congruent side. the perimeter is 570. find the length of each sidethe sides are ___m, ____m, ____m.diagram: the steps are indicated to the previous problems.finish this problem by completing the simple sentence:the sides are 150m, 150m, 270m.[...]2008-05-14T08:38:13.748-05:00
Today in class, Mr. Harbeck taught us how to do a problem solving question. Now, I'm going to scribe how to do/answer a problem solving question using numbers. 1. The second of two numbers is 4 times the first. Their sum is 50. Find the numbers. The numbers are ____and____. (You can also write this at the end of the equation)4x would be on the right side of the + sign, because it is the second number. The first number is x.So, the equation would be like this:Let x = first #x + 4x = 50 5x = 50 (combined terms)x = 10The answer is 10, 40You must write the formula x + 4x = 5010 + 4(10) = 5010 + 40 = 5050 = 50x = 104x = 40 2. The larger of two numbers is 12 more than the smaller. Their sum is 84. Find the numbers.The numbers are ____,____,and ____. (You can also write this at the end of the equation) Two other # would equal x because we don't know anything about them. let x = small # 1 and small # 2x + 12 + x + x = 84 3x + 12 = 84 (combined terms) -12 -123x = 72 x= 24 The answer is 36, 24, 24 4. The second of two numbers is 5 more than twice the first. Their sum is 80. Find the numbers. The numbers are ____,and ____. (You can also write this at the end of the equation) let x = first#5 more than twice the first2x + 5the sum is 80= 80x + 2x + 5 = 803x + 5 = 80- 5 -53x = 753x = 252x+5 = 55x = 25The answer is 25, 55 6. Find two numbers whose sum is 92, if the first is 4 more than 7 times the second. Find the first number.The numbers are ____,and ____. (You can also write this at the end of the equation)let x = second #(7x + 4) + x = 92 8x + 4 = 92 (combined terms)- 4 -48x = 888x = 11(7x + 4) + x = 928(11) + 4 = 9288 + 4 = 9292 = 92x = 117x + 4 = 81The answer is 11, 92 8. Together, a necklace and a bracelet cost $192. Find the price of each if the necklace costs 3 times as much as the bracelet.The price is____. (You can also write this at the end of the equation)Let x = bracelet 3x = Necklace3x + x = 1924x = 1924x = $48 ($48.00)3x = 3(48)= 144x = 48$144.00+$48.00$192.00The price of a bracelet is $48.00 and the necklace is $144.00.[...]2008-05-06T20:34:23.486-05:00
My scribe is about Distributive Property(image)
Way #3
x + 6
x + 6
x + 6
3x + 18
So Distrubtive Property is basicaly expanding the expression.
The best way to use distrubtive property will probably be Way #3 and #1 if Way #2 helps you understand better then use it.
2008-05-05T19:44:41.046-05:00
The steps for Equation Solving for addition4.) SUBSTITUTE TO CHECK
(image)
2008-05-05T18:59:20.119-05:00
The steps for doing this equation solving for multiplying and dividing are:2008-05-05T18:12:41.352-05:00
2008-05-05T17:49:05.880-05:00
Sorry this scribe was waaay late- Hours x 4 -1 = Km walks
- 4x -1 = y
X = hours
Y= Km walked
C) Using your algebraic expression determine how far they could walk after 50 hours
50 = 4x - 1
= 4(200) - 1
= 199 Km
This test was out of 16. Thanks!
2008-05-02T07:58:40.263-05:00
2008-05-01T22:21:50.960-05:00
On part one of the math test, we were given eight algebraic equations. Half were written out in numeric form, the other half, as written in words. For the numeric equations, we had to write down the correct word form for that equation. For example, the numerical equation would be 7x + 5x, and then we'd have to write it as seven times a number increased by 5 times a number. Like this: When we were dealing with the written form, the equation would be like, nine centimeters less than 3/4 of length x. Then we'd have to write it into a numeric equation, which would be 3/4x - 9. Like this:These type of questions ended the first part.For Part Two, we were to complete a graph. We were given a graph and the first 3 figures of a pattern. The first 3 figures of the pattern were these:The graph looked like this : You had to fill three sides of the graph with the appropriate title.We also had to create a T - Table showing our understanding of the pattern. It kind of looked like this : After we completed the chart, and had it all filled out, we had to come up with an algebraic equation on how you would get from x to y. This was the equation needed:You need to have the x equal the figure number and the y equal the number of squares. In our test these were what we needed to get the questions correct:This ends the test, hope you guys learned a lot!!![...]2008-05-01T18:02:50.936-05:00
AlgetilesBy using algetiles, we can find out how an algebraic expression looks like.
Example:
(image) Another Example(image)
2008-04-21T22:39:13.814-05:00
Surface Area of a Cylinder2008-04-17T21:34:44.525-05:00
CIRCUMFERENCE OF A CIRCLE...Circumference (C) is the distance around the outer ring.C = Pi x d or Pi2r/2Pir Pi is a constant and is approximately equal to 3.14.PictureExample Radius (r) is the distance from the center to the outer ring...PictureThe diameter (d) of circle is twice the length of the radius...D = 2 x r or 2r PictureExampleAREA OF A CIRCLE...Area = Pi x r²Pi = 3.14Radius is the distance/length from the center to the outer ring... PictureExample **just remember the formulas and it would be easy...[...]2008-04-16T17:37:36.483-05:00
Todays class is about the surface area of a cylinder.the cylinder has 3 shapes, 2 circles and a rectangle. To get the surface area of a cylinder follows this formula:
SA = (Pi x r²) + (2 x Pi x r) + ( Pi x r²)
In class we had a an example question: the height is 10 and the radius is 5. The circumference is the length of the rectangle so you get the area of the 3 shapes and add them together to ge the Surface area.
SA = (3.14 x 25) + (2 x 3.14 x 5) + ( 3.14 x 25)
= 78.5 + 314 + 78.5
= 417
2008-04-15T23:36:40.324-05:00
Surface Area & Volume of a Rectangular Prism2008-04-15T22:41:39.745-05:00
In this bob I will be showing you about the surface area and the volume of a rectangular prism.....2008-04-19T23:17:34.594-05:00
Finding the surface area of a cube and a rectangular prism,needs the illustration of the net and solve the problem based on the formula. in getting the volume also need formula. good thing in cubes are that they have same sides.To represent this objects, we need to illustrate 3d imagesGetting the surface area of a cube.3d cube SA formula of the surface area of a cubeSolution in getting the surface area of a cube. i did this because it is easier. since cube has 6 sides with equal area, i multiplied each side with the same area to the number of sides that make up a cube.Net of a cubeGetting the volume of a cubeformula of getting the volume of a cube. It can also be used in a rectangular prism. the area of the base times height is commonly used in getting the volume of many shapes including triangular pyramids and excluding irregular shapes (i guess) Getting the volume of a cube or a rectangular prism is very easy. just multiply the area of the base, or length times width, then multiply it to the height.In getting the volume of a rectangular prism, the formula is still the same, the formula is a lifetime formula.Getting the volume of a rectangular prismIn this example, same formula is used and just solve it, the unit of the answer or the volume is called cubic centimetresGetting the Surface area of a rectangular prismAs said, the formula is 2(lw)+2(hl) + 2(hw). it is the very common in getting the surface area of a rectangular prism.by the way, the variables stands for:l-lengthw-widthh-heightnet of a rectangular prism[...]2008-04-16T20:24:04.164-05:00
This BOB is all about how to find the volume and surface area of a cube and a rectangular prism.Also the net of the 3-D object.The step to finding out the surface area of a cube. The Net Example Surface Area = 6(2cmx2cm)= 24cm2 The step to finding out the volume of a cubeHow to get the volume of a cube:(LxWxH)Example L(2)xW(2)xH(2)=2x2x2=8cm3 The step to finding out the surface area of a rectangular prism The NetExampleSurface Area= 4(2cmx6cm) = 48cm2+2(2cmx2cm)= 8cm2______________________56cm2The step to finding out the volume of a rectangluar prism (LxWxH)L(2)xW(2)xH(6)=2x2x6=24cm3[...]2008-04-15T21:45:46.996-05:00
For this BOB, I will show you what I know about getting the surface area and volume of a rectangular prism...2008-04-15T20:15:28.030-05:00
This blog is about the steps to find the surface area and the volume for a cube and a rectangular prism. When doing work for a cube or a rectangular prism you need to include the 3D diagram and their net.This is the 3D version of a cube :This is the cube's net :This is an example of a rectangular prism :This is it's net :There are several ways to find a surface area for both of the shapes. One way for the cube is this :It is clear that if you get the areas of each square in the cube you already can solve the surface area of the cube. You can solve the area of each side by multiplying the two different measurements that make the side. For example, if one side is made up by 2 lengths and 2 widths, you multiply the width and length together to get the area. So if you already have all the areas, just add all six sides together and get the Surface Area.There are two steps used to solve both of the shapes. I used one of them on the cube.All you have to do is find the base and multiply that answer with the height. To find the "base" of a shape, all you have to do is multiply it's length with the width.Now moving on to the rectangular prism. The step I used for this shape can also be used on a cube.This step take more time. If you multiply length and width, you are finding the area for the Top or the Bottom parts of the shape. If you multiply length and height, you are finding the area for the Front or Back. And if you multiply width and height, you obviously get the area for one of the two sides. Since there are six sides. Once you find the area for one side of the shape, times it by two to get the other side. For example, if you find the area for the Top, just multiply it by two so you can get the area for the Bottom also.Yes, these steps on finding the volume of a rectangular prism can also be used to find the volume of a cube :This explanation is quite simple. If you multiply the length and width, find the answer and multiply that to the height. Once your done that, you have solved the volume.Now...you guys should know how to find the Surface Area and the Volume of a Cube and also a Rectangular Prism.[...]2008-04-17T20:24:30.478-05:00
On this bob I'll be explaining how to get the surface area and volume of a cube and a rectangular prism and I'll also show you the net.2008-04-15T20:16:43.386-05:00
HOW TO SOLVE THE SURFACE AREA AND VOLUME OF A RECTANGULAR PRISM:2008-04-15T20:15:36.308-05:00
What i know all about surface area and the volume of a cube and rectangular prism:2008-04-15T20:52:11.444-05:00
On this BOB, I will be talking about the surface area and a volume of a rectangular prism and a cube. I will also show pictures so that it could make it easier to understand.The surface area of a rectangular prism is covered with six rectangles.Although we don't have to figure out all six of them since top and bottom are the same, right and left are the same, and also front and back of it is the same. Height, lenght, width are the lenghts of the 3 sides.The surface area of a cube is the area of six squares that covers the whole thing. The formula of the surface area of a rectangular prism and a cube is the same.Area of Top and Bottom = 2(L x W) Area of Front and Back = 2(H x L) Area of Both Sides = 2(H x W) The whole formula of the surface area of the rectangle is 2(lxw)+2(hxl)+2(hxw)An example of surface area;The volume of a rectangular prism and a cube can be found by the formula: volume=length x width x height or bxhAn example would be; [...]2008-04-15T19:17:06.697-05:00
For this BOB, im going to talk about surface area and volume of a triangular prism and cube.surface area solution: