Saturday

May 23, 2015

May 23, 2015

**geometry**

Blake draws a diagonal to cut a trapezoid. He says he is left with two triangles. Is Blake correct?
*Tuesday, April 23, 2013 at 3:48pm*

**geometry**

Tamika draws a line that would cut a 8. square in half. She says she makes 2 smaller squares. Is Tamika Correct?
*Tuesday, April 23, 2013 at 3:46pm*

**geometry**

What shape will you always get when you combine a square pattern block and a triangle pattern block?
*Monday, April 22, 2013 at 6:00pm*

**geometry**

What shape will you always get when you combine a trapezoid pattern block and a triangle pattern block?
*Monday, April 22, 2013 at 6:00pm*

**geometry**

which pattern blocks can be combined to make the shape rhombus?
*Monday, April 22, 2013 at 5:05pm*

**chemistry**

Using the PM3 semiempirical method in HyperChem, treat planar napthalene. First build the molecule, choose SemiEmpirical methods and PM3, and perform a Geometry Optimization. Look in the "Compute>Orbitals" menu to determine the energies of the HOMO and LUMO. What ...
*Monday, April 22, 2013 at 2:55am*

**geometry**

AB has a length of 5 cm the line segment is dilated to produce A'B' which has a length of 2 cm what is the scale factor of the dilation
*Sunday, April 21, 2013 at 6:40pm*

**COOP Exam?? (practice)**

Is there any online COOP exam I can practice to pass that COOP exam I'm taking (I'm applying to catholic high school. It's a private school). This what it will be on the exam: Test 1 Sequences This test measures the student’s ability to comprehend a rule or ...
*Saturday, April 20, 2013 at 5:52pm*

**geometry**

Find the weight to the nearest kg, of the cement block. Cement weighs 1700 kg/m3. 12cm x 10cm and 40cm x 20 cm x 20cm.
*Saturday, April 20, 2013 at 4:47pm*

**Geometry**

A circle of radius 1 is drawn in the plane. Four non-overlapping circles each of radius 1, are drawn (externally) tangential to the original circle. An angle ã is chosen uniformly at random in the interval [0,2ð). The probability that a half ray drawn from the ...
*Saturday, April 20, 2013 at 4:46pm*

**Geometry**

There are 100 runners, each given a distinct bib labeled 1 to 100. What is the most number of runners that we could arrange in a circle, such that the product of the numbers on the bibs of any 2 neighboring runners, is less than 1000?
*Saturday, April 20, 2013 at 4:45pm*

**geometry**

Quadilateral KLMN is enlarged by a factor of p.Find the largest value of p for which the image of KLMN is contained in the circle centered at (0;0) with radius 1
*Saturday, April 20, 2013 at 12:54pm*

**Geometry**

One pizza has a diameter twice the diameter of a smaller pizza. what is the rato of the area larger pizza to the area of the smaller pizza?
*Friday, April 19, 2013 at 9:21pm*

**geometry!!!.....Alice's Concession Choices**

Alice is at a country fair with 4 concession stands. She cannot decide in which order to visit each concession stand. Assuming she visits each stand once and only once, how many different ways are there to visit all the concession stands
*Friday, April 19, 2013 at 3:51am*

**geometry ( trigonometric ratios)**

a girl who is standing 92 ft away from a building looks up at a angle of 86 degrees at a bird on the top of a building. What is the height, from the ground, to the bird on the top of the building ?
*Thursday, April 18, 2013 at 11:03pm*

**Chemistry - molecular polarity**

Hi Dr. Bob. Could you please take a look at the question below and my work? I'm not sure how to get the correct answer for this question. I would greatly appreciate your help! How many of the following molecules are polar? BrCl3 CS2 SiF4 SO3 A) 1 B) 2 C) 3 D) 4 E) 0 The ...
*Thursday, April 18, 2013 at 3:45pm*

**geometry...TRIANGLE**

ABCD is a quadrilateral with ∠ADC=∠ACD, ∠ACB=∠ABC and CD=7. If triangles ADC and ABC have perimeter 51 and 59, respectively, what is the value of BC?
*Thursday, April 18, 2013 at 4:18am*

**GEOMETRY......circle**

Circles Γ1 and Γ2 intersect at 2 distinct points A and B. A line l through A intersects Γ1 and Γ2 at points C and D, respectively. Point E is the intersection of the tangent to Γ1 at C and the tangent to Γ2 at D. If ∠CBD=30∘, what is ...
*Thursday, April 18, 2013 at 4:13am*

**geometry**

find the value of x .simplify answers that are radicals.
*Wednesday, April 17, 2013 at 11:36pm*

**Geometry**

I appreciate any help you can give me. Here is my question: Find the coordinates of the images of A(2,3), and B(-2,3) under the following transformations. Assume that all size transformations are centered at the origin. a. A size transformation with scale factor 2 followed by ...
*Wednesday, April 17, 2013 at 8:23pm*

**geometry**

Is this syllogism? 1. In-line skaters live dangerously. 2.if you live dangerously, then you like to dance. 3, If you are an in-line skater, then you like to dance.
*Wednesday, April 17, 2013 at 7:13pm*

**geometry**

Is this detachment or syllogism?1. If I get to drive, then i will go to the fashions show? 2.Kristin got to go to the fashin show. 3.Krisitn got to drive
*Wednesday, April 17, 2013 at 7:11pm*

**Geometry math **

Ok if I have a rectangle MNOP ~ rectangle STUV. what is the length of TU with a line over TU? First rectangle is MNOP with 10 on one side and 4 on anotherside. Second rectangle is STUV. With one side marked X for unknown #. And one side says # 6. Would x = 10? Or if not can ...
*Wednesday, April 17, 2013 at 12:33pm*

**geometry**

find the measure of the smallest angle , angle hfg , if angle ghf=92 degrees and angle hgf = 72 degrees
*Wednesday, April 17, 2013 at 1:55am*

**Please...help me over here.,Sequence and series**

Insert three geometry means between 1 and 81. I can't even solve it.
*Tuesday, April 16, 2013 at 11:20pm*

**Geometry Part 2**

At a track meet,50 people ran the 100- meter dash.2 people finished in 11 seconds,5 people finished in 12 seconds,8 people finished in 13 seconds,10 people finished in 14 seconds,21 people finished in 15 seconds,2 people finished in 16 seconds,and 2 people finished in 17 ...
*Tuesday, April 16, 2013 at 11:22am*

**Geometry**

Circle G with center O is tangential to PA at A . Line PO extended intersects G at B (PO<PB ). C is a point on AB such that PC bisects angle APB .What is the measure (in degrees) of angle PCA ?
*Tuesday, April 16, 2013 at 4:26am*

**geometry**

For a cone, if the radius was quadrupled and the slant height was reduced to one sixth of its original size, what would be the formula to find the modified surface area?
*Monday, April 15, 2013 at 5:54pm*

**Geometry **

The grade of a road or a railway road bed is the ratio rise/run, usually expressed as a percent. For example, a railway with a grade of 5% rises 5 ft for every 100 ft of horizontal distance. 1. The Johnstown, Pennsylvania, inclined railway was built as a "lifesaver" ...
*Monday, April 15, 2013 at 5:23pm*

**geometry**

A cone has a circular base, a perpendicular height equal to 21cm, and a semi-vertical angle of 30degrees. Calculate the slant height of the cone. Find the area of its base.(take pie to be 22/7)
*Monday, April 15, 2013 at 2:02pm*

**Geometry Part 2**

Janine made a cylindrical vase in which the sum of the lateral area and area of one base was about 3000 square centimetres.The vase had a height of 50 centimetres .Find the radius of the vase.Explain your method you would use to find the radius .
*Monday, April 15, 2013 at 12:17pm*

**Geometry Part 2**

State whether the transformation of a Preimage and Image circles appears to be a rigid motion?Explain
*Monday, April 15, 2013 at 10:37am*

**Geometry Part 2**

A forest ranger spots a fire from a 28- foot tower.The angle of depression from the tower to the fire is 11.To the nearest foot,how far is the fire from the base of the tower?Show the steps you use to find the solution.
*Monday, April 15, 2013 at 10:34am*

**Geometry Part 2**

A highway makes an angle of 6 with the horizontal.This angle is maintained for a horizontal distance of 5 miles.To the nearest hundredth of a mile, how high does the highway rise in this 5- mile section?Show the steps you use to find the distance.
*Monday, April 15, 2013 at 10:03am*

**Geometry Part 2**

A triangle has side lengths 10,15,and 7.Is the triangle acute,obtuse,or right?Explain.
*Monday, April 15, 2013 at 9:45am*

**geometry**

ABCD is a quadrilateral with ∠ADC=∠ACD, ∠ACB=∠ABC and CD=7. If triangles ADC and ABC have perimeter 51 and 59, respectively, what is the value of BC?
*Monday, April 15, 2013 at 4:19am*

**geometry**

in the diagram below of quadrilateral abcd ac is a diagonal that biscets <bad and <bcd which statment can be used to prove that riangle abc is congruent to triangle adc
*Sunday, April 14, 2013 at 4:36pm*

**geometry**

the dimensions of the triangular lateral faces of a pyramid are dilated with a scale factor of 8/3 to create similar triangles. if the perimeter of one triangular face was 57 inches what is the perimeter of each of the dilated triangular faces
*Saturday, April 13, 2013 at 4:56pm*

**geometry**

a rectangular patio is 13 feet by 84 feet. In walking from one corner of the patio to the opposite corner, how much distance is saved by cutting diagonally across the patio rather than walking around the outer edge?
*Thursday, April 11, 2013 at 7:59pm*

**Geometry**

Arpit is thinking of a 2-digit number where the tens digit is twice the ones digit. How many different numbers can Arpit be thinking of?
*Thursday, April 11, 2013 at 7:39pm*

**Geometry**

A set of three distinct positive integers has mean 4 and median 5. What is the largest number in the set?
*Thursday, April 11, 2013 at 7:38pm*

**Geometry**

Two players each flip a fair coin. The probability that they get the same result can be expressed as a b where a and b are coprime positive integers. What is the value of a+b ?
*Thursday, April 11, 2013 at 7:35pm*

**Geometry**

If two six-sided dice are rolled, the probability that they both show the same number can be expressed as a b where a and b are coprime positive integers. What is the value of a+b ?
*Thursday, April 11, 2013 at 7:33pm*

**Geometry(first one is typo)**

Let ƒÆ=sin −1 7/25 . Consider the sequence of values defined by a n =sin(nƒÆ) . They satisfy the recurrence relation a n+2 =k 1 a n+1 +k 0 a n ,n¸N for some (fixed) real numbers k 1 ,k 0 . The sum k 1 +k 0 can be written as p q , where p...
*Thursday, April 11, 2013 at 6:56pm*

**Geometry**

Let ƒÆ=sin −1 7 25 . Consider the sequence of values defined by a n =sin(nƒÆ) . They satisfy the recurrence relation a n+2 =k 1 a n+1 +k 0 a n ,n¸N for some (fixed) real numbers k 1 ,k 0 . The sum k 1 +k 0 can be written as p q , where p...
*Thursday, April 11, 2013 at 6:55pm*

**Geometry**

ABC is a triangle with circumcenter O , obtuse angle BAC and AB<AC . M and N are the midpoints of BC and AO respectively. Let D be the intersection of MN with AC . If AD=1 2 (AB+AC) , what is the measure (in degrees) of ÚBAC ?
*Thursday, April 11, 2013 at 6:54pm*

**Geometry**

Let ƒÆ=sin −1 7 25 . Consider the sequence of values defined by a n =sin(nƒÆ) . They satisfy the recurrence relation a n+2 =k 1 a n+1 +k 0 a n ,n¸N for some (fixed) real numbers k 1 ,k 0 . The sum k 1 +k 0 can be written as p q , where p...
*Thursday, April 11, 2013 at 6:17pm*

**Geometry**

ABC is a triangle with circumcenter O, obtuse angle BAC and AB less than AC. M and N are the midpoints of BC and AO respectively. Let D be the intersection of MN with AC. If 2AD=(AB+AC), what is the measure of angle BAC ?
*Thursday, April 11, 2013 at 11:27am*

**Geometry**

2x^2-9x-5=0 Is it possible to combine 2x squared with 9x? Not sure how to tackle solving this one.
*Wednesday, April 10, 2013 at 9:26pm*

**geometry**

Which description does NOT guarantee that a trapezoid is isosceles? A. congruent bases B. congruent legs C. both pairs of base angles congruent D. congruent diagonals
*Tuesday, April 9, 2013 at 9:31pm*

**Geometry**

ABC is a triangle with circumcenter O , obtuse angle BAC and AB<AC . M and N are the midpoints of BC and AO respectively. Let D be the intersection of MN with AC . If AD=1 2 (AB+AC) , what is the measure (in degrees) of ÚBAC ?
*Monday, April 8, 2013 at 10:29pm*

**Analytic Geometry/Calculus**

We didn't go over the perpendicular form in class, only the parallel. Find the general form of the equation of the plane passing through the point and perpendicular to the specified vector or line.
*Monday, April 8, 2013 at 7:40pm*

**7th grade math/ geometry**

how to name an angle in four ways?
*Monday, April 8, 2013 at 7:26pm*

**geometry**

On my last question, just posted, I asked what percent of the area of the target was shaded. The answer options were 5%, 10%, 20% or 80%?
*Monday, April 8, 2013 at 6:45pm*

**geometry**

There is a square with a star inside. The square has 25cm to show the length of one side. On the right, outside the square, it says 125cm squared, with a line pointing the center of the star in the square. The question is; The target of a shooting game features a shaded star ...
*Monday, April 8, 2013 at 6:42pm*

**Math**

I think this is geometry: There is a small box with a black frame around it. Inside the box, at the bottom, is an 8. Inside the box, to the right, is a 2. It looks like they are showing Length & Height. On the outside of the box, under the 8, there is a 10. To the right, ...
*Monday, April 8, 2013 at 5:46pm*

**Geometry**

Convex quadrilateral ABCD has sides AB=BC=21, CD=15 and AD=9. Given additionally that ∠ABC=60∘, what is the length of BD?
*Monday, April 8, 2013 at 8:49am*

**geometry**

The ratio of two similar prisms is 2:5 the volume of the larger is 375cm3 if sand is being poured into the smaller prism at 3cm3 per second how many seconds will it tAke to fill the smaller prism?
*Sunday, April 7, 2013 at 9:40pm*

**Geometry**

A sphere has a great circle circumference of 40pi feet. What's its volume?
*Sunday, April 7, 2013 at 6:31pm*

**Geometry**

Lobster fishers in Maine often use spherical buoys to mark their lobster traps. Every year the buoys must be repainted. An average buoy has a 12 inch diameter, and an average fisher has about 500 buoys. A quart of marine paint covers 175 ft squared. How many quarts of paint ...
*Sunday, April 7, 2013 at 5:33pm*

**geometry**

camera is 4 ft 6 inched off the ground 18 feet away from a silo, how tall is the silo
*Saturday, April 6, 2013 at 10:54am*

**geometry**

LMNO is a parallelogram. If NM = x + 15 and OL = 3x + 5, find the value of x, then find NM and OL
*Friday, April 5, 2013 at 9:25am*

**Geometry**

ABCD is a parallelogram. If ÚABC=35 degrees , what is the measure (in degrees) of ÚADC ?
*Friday, April 5, 2013 at 12:12am*

**Geometry**

How many three digit numbers have three distinct digits?
*Friday, April 5, 2013 at 12:01am*

**geometry**

if the midpoints of the sides of a parallelogram in succession are joined, the quadrilatral formed is a a parallogram. Prove this theorem in euclidean geometry using analytic techniques
*Thursday, April 4, 2013 at 7:29pm*

**Analytic Geometry - lengths?**

Square ABCD has sides of length 4, and M is the midpoint of CD . A circle with radius 2 and center intersects a circle with radius 4 and center A at points P and D . What is the distance from P to AD? Please help - I drew the diagram, but looks kinda wierd, and dunno which ...
*Thursday, April 4, 2013 at 5:34pm*

**geometry**

In the diagram, circle A is tangent to circle C, and segment BE is tangent to circle A. The radius of circle A is 11 meters and the radius of circle C is 8 meters. Find the area of triangle ABE to the nearest square meter.
*Thursday, April 4, 2013 at 1:30am*

**geometry**

Which quadrilaterals have 2 pairs of parallel sides?
*Wednesday, April 3, 2013 at 4:20pm*

**geometry**

A board on the wall in Jeremy's class has 4 right angles, 4 equal sides, and 2 pairs of parallel sides. Which quadrilateral is it?
*Wednesday, April 3, 2013 at 3:52pm*

**Analytic Geometry - Circles and Areas**

Let R denote the circular region bounded by x^2+y^2 = 36. The lines x=4 and y=3 partition R into four regions R1, R2 ,R3 , and R4. Let [Ri] denote the area of region Ri. If [R1]>[R2]>[R3]>[R4] , then compute [R1]-[R2]-[R3]+[R4]. Could someone help me, I don't ...
*Wednesday, April 3, 2013 at 7:36am*

**geometry**

Chris is making a painting with only triangles. He wants each side of the triangles to be the same length. What kind of triangle will he paint?
*Tuesday, April 2, 2013 at 10:31pm*

**geometry**

n the xy -plane, the graph of y = x^2 and the circle with center (0,1) and radius 3 have how many points of intersection?
*Tuesday, April 2, 2013 at 4:23pm*

**geometry**

a point F is at a certain distance from a line AB .Another point P is moving in a plane such that the ratio of it's distance from F and line AB remains constant .find the locus of the point P
*Tuesday, April 2, 2013 at 12:42pm*

**GEOmetry(Special Coin Placement)**

Three coins are randomly placed into different positions on a 4×10 grid. The probability that no two coins are in the same row or column can be expressed as a/b where a and b are coprime positive integers. What is the sum of a+b?
*Tuesday, April 2, 2013 at 3:56am*

**GEOMETRY(POLYGON)**

A regular polygon has interior angles of 150∘. A,B,C,D are 4 consecutive points of this polygon. What is the measure (in degrees) of ∠ADC?
*Tuesday, April 2, 2013 at 3:39am*

**Geometry**

What is the surface area and lateral area of a regular triangular pyramid if the slant is 7 and the altitude is 5?
*Monday, April 1, 2013 at 10:40pm*

**geometry**

Derive the distance formula (d) shown below for points A = (x1, y1, z1) and D = (x2, y2, z2). 2 2 1 2 2 1 2 d = (x2 − x1) + (y − y ) + (z
*Monday, April 1, 2013 at 1:42pm*

**Geometry: Student Correction (Stuck)**

Joelle set up the following proportion: 4/6 = 5/x. Solve for x. Determine if proportion is correct. If not, explain what is wrong with it.
*Friday, March 29, 2013 at 2:34pm*

**Geometry **

Triangle ABC has vertices of A(0,0), B(–4,0)and C(–2,4). The coordinates of each vertex in triangle AEF are multiplied by 3 Is triangle ABC~AEF? Explain.
*Friday, March 29, 2013 at 2:31pm*

**geometry**

if the measurement of angle 1 plus the measurement of angle 4 equals 70, find the sum of angle 6 and angle 7
*Friday, March 29, 2013 at 2:00pm*

**geometry**

126x72 two sides of a triangle what is the third side
*Friday, March 29, 2013 at 1:24am*

**Geometry**

Find the surface area of a cylinder whereas diameter is 9 ft and height is 24 ft
*Thursday, March 28, 2013 at 1:02am*

**Geometry**

A right triangular prism has volume equal to 288 cm^3 . The height of the prism is 3 cm. One of the bases of the triangular face (not the hypotenuse) is equal to 12 cm, determine the length of the hypotenuse (in cm) of the triangular face.
*Thursday, March 28, 2013 at 12:18am*

**Geometry**

A right triangular prism has volume equal to 288 cm^3 . The height of the prism is 3 cm. One of the bases of the triangular face (not the hypotenuse) is equal to 12 cm, determine the length of the hypotenuse (in cm) of the triangular face.
*Thursday, March 28, 2013 at 12:18am*

**Geometry**

A right triangular prism has volume equal to 288 cm^3 . The height of the prism is 3 cm. One of the bases of the triangular face (not the hypotenuse) is equal to 12 cm, determine the length of the hypotenuse (in cm) of the triangular face.
*Thursday, March 28, 2013 at 12:18am*

**Geometry**

The vertices of a regular 10-gon are labeled V_1, V_2, \ldots V_n, which is a permutation of \{ 1, 2, \ldots, 10\}. Define a neighboring sum to be the sum of 3 consecutive vertices V_i, V_{i+1} and V_{i+2} [where V_{11}=V_1, V_{12}=V_2]. For each permutation \sigma, let N_\...
*Wednesday, March 27, 2013 at 11:53pm*

**Geometry**

ABCD is a trapezoid with AB < CD and AB parallel to CD. \Gamma is a circle inscribed in ABCD, such that \Gamma is tangent to all four sides. If AD = BC = 25 and the area of ABCD is 600, what is the radius of \Gamma?
*Wednesday, March 27, 2013 at 11:52pm*

**Geometry**

The value of y that minimizes the sum of the two distances from (3,5) to (1,y) and from (1,y) to (4,9) can be written as \frac{a}{b} where a and b are coprime positive integers. Find a + b.
*Wednesday, March 27, 2013 at 7:09pm*

**geometry**

The scale factor is 5/4. Find the area of the pre-image if the area of the image is 150 in2.Show your work.
*Wednesday, March 27, 2013 at 3:58pm*

**GEOMETRY**

The squares of a 3×3 grid of unit squares are coloured randomly and independently so that each square gets one of 5 colours. Three points are then chosen uniformly at random from inside the grid. The probability that these points all have the same colours can be ...
*Wednesday, March 27, 2013 at 3:05pm*

**Geometry**

The value of y that minimizes the sum of the two distances from (3,5) to (1,y) and from (1,y) to (4,9) can be written as \frac{a}{b} where a and b are coprime positive integers. Find a + b
*Wednesday, March 27, 2013 at 11:58am*

**Geometry**

ABCD is a quadrilateral inscribed in a circle with AB = 1, BC = 3, CD = 4 and DA = 6. What is the value of \sec^2 \angle BAD?
*Tuesday, March 26, 2013 at 11:34pm*

**Geometry**

Determine the number of subsets of A=\{1, 2, \ldots, 10\} whose sum of elements are greater than or equal to 28 .
*Tuesday, March 26, 2013 at 11:33pm*

**Geometry**

ABC is an acute triangle with \angle BCA = 35 ^\circ. Denote the circumcenter of ABC as O and the orthocenter of ABC as H. If AO=AH, what is the value of \angle ABC (in degrees)?
*Tuesday, March 26, 2013 at 11:31pm*

**Geometry**

ABC is an isosceles triangle where AB = AC and BC = 60. D is a point on BC such that the perpendicular distance from D to AB and AC is 16 and 32, respectively. What is the length of AB?
*Tuesday, March 26, 2013 at 11:31pm*

**Geometry**

Two points are chosen uniformly at random on the unit circle and joined to make a chord C_1. This process is repeated 3 more times to get chords C_2, C_3, C_4. The probability that no pair of chords intersect can be expressed as \frac{a}{b} where a and b are coprime positive ...
*Tuesday, March 26, 2013 at 11:29pm*

**Geometry**

Two points are chosen uniformly at random on the unit circle and joined to make a chord C_1. This process is repeated 3 more times to get chords C_2, C_3, C_4. The probability that no pair of chords intersect can be expressed as \frac{a}{b} where a and b are coprime positive ...
*Tuesday, March 26, 2013 at 11:29pm*

**Geometry**

When writing a math expression, any time there is an open bracket "(", it is eventually followed by a closed bracket ")". When we have a complicated expression, there may be several brackets nested amongst each other, such as in the expression (x+1)*((x-2...
*Tuesday, March 26, 2013 at 11:27pm*

**geometry**

what is tan-1 3.5= to
*Tuesday, March 26, 2013 at 7:59pm*

**Geometry**

When you use the distance formula, you are building a _____ triangle whose hypotenuse goes between two given points. A.right B.equilateral C.acute D.None of these
*Tuesday, March 26, 2013 at 10:02am*