Number of results: 17,876

**chemistry**

if an acid spilled on a highway, what should be done to clean up the spill?

*March 9, 2010 by glr*

**Algebra 1 HELP!!**

4n=28n-3 i have to solve for n Move the letters to one side and the numbers to the other. Change sign when doing so. 4n-28n=-3 Combine terms. -24n=-3 Multiply everything by -1 24n=3 Now divide both sides by 24 24n/24 = 3/24 n=1/8 I hope this helps. What would be the missing ...

*November 1, 2006 by marie*

**Geometry**

1. What is the base and the height of the rectangle if the area is 216 and the perimeter is 66? 2.The perimeter of an isosceles trapezoid is 40 ft. Thr bases of the trapezoid are 11ft and 19 ft. Find the area of the trapezoid.

*April 28, 2012 by Anonymous*

**math**

One sign blinks every 9 seconds. The other sign blinks every 15 seconds. In how many seconds will they blink together again

*September 29, 2016 by nick*

**algebra**

a student measures the height of a sign to be 2 meters. the shadow of the sign 3 meters. the student notices that at the same time nearby tree has a shadow of 15.6 meters. how tall is the tree? What equation would be used for this?

*May 5, 2016 by james*

**MATH**

The exterior angle of a regular polygon is the angle formed by an extended side and the adjacent side. a)what is the measure of each interior angel of a regular pentagon. (There is apicture on the page and each side measures 21mm) Help please.

*May 17, 2009 by CAITLIN D.*

**physics**

A pendulum has a mass of 3-kg, a length of 2 meters and swings through a (half)arc of 27.3 degrees. What is its Amplitude to the nearest centimeter ?

*August 15, 2010 by Skyler*

**science**

a ______ is the main unit of measure in the metric system a)millimeter b)kilometer c)centimeter d)meter e) none of the above d

*September 4, 2010 by pam*

**Physics**

A pendulum has a mass of 2.7 kg, a length of 1.7 meters, and swings through a (half)arc of 22.7 degrees. What is its amplitude to the nearest centimeter?

*December 21, 2010 by Karin*

**physics**

A pendulum has a mass of 3.6 kg, a length of 2.1 meters, and swings through a (half)arc of 26.2 degrees. What is its amplitude to the nearest centimeter?

*April 15, 2012 by 18*

**Physics**

A pendulum has a mass of 3.2 kg, a length of 2 meters and swings through a (half)arc of 28.1 degrees. What is its amplitude to the nearest centimeter?

*September 19, 2013 by Jay*

**geometric**

Which metric unit can use to mass of a grasshopper. A)centimeter. B)meter. C)gram. My answer is ( C ). Can you tell me it's correct please.

*May 22, 2014 by ezekiel*

**Trigonometry - Geometry - side lengths**

In convex quadrilateral ABCD, angle A is congruent to angle C, AB=CD=180, and AD is not equal to BC. The perimeter of ABCD is 640. Find cos A. Hmm...I drew the diagram, and labeled some things, I drew an altitude from D to AB and did some other things, but no success was ...

*December 6, 2013 by Sam*

**Geometry-PSSA Practice**

Which of the following quadrilaterals must have diagonals that bisect each other? Rectangle Parallelogram Rhombus Isosceles Trapezoid

*March 13, 2008 by Christina*

**solid mensuration**

The base of a right prism is a rhombus whose sides are 20cm and the shorter diagonal is 24in..find the area pls.

*May 12, 2011 by leo*

**Math solid mensurations**

rhombus ABCD has diagonals that intersect at E. DF is drawn perpendicular to DC and AD at D. With AB = 10cm, <BCD = 60 degrees and FD = 4cm, Find the length of FE

*February 23, 2012 by Anonymous*

**Math**

The area of a rhombus is 60cmsq. If one of its diagonl is 16cm.find the other diagonal. Plz gve ful sltn nd ans is 7.5m

*September 15, 2012 by Simran kaur*

**Math-Trig**

Answer to four significant figures, or to the nearest minute. f) one vertex angle of a rhombus is 25°. Find the ratio of the diagonals.

*April 18, 2016 by Jessica*

**math**

If the adjacent vertices of a square ABCD are A ( -2 , 0 ) , find - The equation of the two diagonals AC and BD - The point of intersection O of the two diagonals AC and BD - The equation of the altitude from O to the side CD - The centroid of the triangle OCD by finding any ...

*December 27, 2011 by Nora*

**Perimeter and area**

The gadget comes with a page of instructions. When page is unfolded, it is 81 square inches. If one page is nine inches wide what is the perimeter?

*February 3, 2011 by Garrett*

**MTH208**

The perimeter of a rectangle equals the sum of the lengths of its four sides. If the width of a rectangle is 3 inches and its perimeter is 42 inches, find the length of the rectangle

*June 24, 2012 by Carlos Medina*

**algebra**

The perimeter of a rectangle equlas the sum of the lengths of its four sides. If the width of a rectangle is 7 inches and its perimeter is 46 inches, find the length of the rectangle

*January 14, 2013 by Anonymous*

**algebra**

The perimeter of a rectangle equals the sume of the lengths of its four sides. If the width of a rectangle is 9 inches and its perimeter is 52 inches, find the length of the rectangle.

*January 16, 2013 by luis barreto*

**math**

the perimeter of two square are 848cm and 436cm find the perimeter of square whose area is equal to the sum of areas of two square.

*November 1, 2016 by abhilasha*

**chem**

why is H+ a proton h+ would be a proton because it has a positive electric charge,just as all protons have to be positive. im just beginning to stdy this so take my answer and search it before you write anything down, but im pretty sure its right. Yeah, you are right. Anything...

*May 30, 2007 by anona*

**Geometry**

Can some one please check these for me.Thanks Angle DEF is similar to Angle HJK and the scale factor of angle DEF to anle HJK IS 5/2. If EF =15 FIND JK Here is what I came up with Am I correct 5/2 = EF/JK 5/2 =15/JK 5(JK)=30 JK=30/5 JK=6 Given: ABCD is a parallelogram; <1 ...

*June 14, 2007 by DANIELLE*

**Math**

Abigail Adventuresome took a shortcut along the diagonal of a rectangular field and saved a distance equal to 1/3 the length of the longer side.Find the retio of the length of the shorter side of the rectangle to that of the longer side.

*January 5, 2010 by JEFF BOMB*

**mathematics (word problems leading to linear equations )**

The side of one square is 5cm longer than the side of another square. The area of the two squares differ by 85 square centimetres. find the length of the side of the smaller square.

*April 13, 2016 by Bongiwe Gamede*

**math**

Highway engineers often use quadratic functions to model safe distance for cars. For example, f(x)= 1/2 x^2 + 4/5x is sometimes used to model the stopping distance for a car traveling at X miles per hour on dry, level pavement. If a driver can see only 200 ft ahead on a ...

*September 3, 2014 by jun gajetos*

**geometry**

Suppose the dimensions of a rectangle with a perimeter of 21 inches are doubled. What is the perimeter of the new rectangle in inches?

*February 13, 2011 by Moriah*

**Algebra 1**

Write an equation for for each translation of y=|x| 1. left 2 units y = |x| consists of two 45 degree curves joined at the origin: y = x for x>0, and y = -x for x < 0. To move the curves to the left 2 units, you want the sign of the term inside the absolute value sign to...

*January 7, 2007 by Mike*

**perimeter**

how to draw a 15 cm and 9 cm perimeter

*November 14, 2010 by selina*

**math**

Prove this identity (cos è - 1) / (cos^2 è) = sec è - sec^2 è I have a question when you simplify the secant in terms of cosine. Would you cross multiply but then again there's the subtraction sign there instead of a multiplication sign? then would you multiply by the lcd ...

*April 5, 2010 by Rachel*

**Trigonometry**

4. An observer is near a river and wants to calculate the distance across the river. He measures the angle between his observations of two points on the shore, one on his side and one on the other side, to be 28º. The distance between him and the point on his side of the ...

*May 1, 2015 by Gab*

**Physics**

Two rockets are flying in the same direction and are side by side at the instant their retrorockets fire. Rocket A has an initial velocity of + 6400 m/s, while rocket B has an initial velocity of + 9800 m/s. After a time t both rockets are again side by side, the displacement ...

*September 11, 2012 by StressedStudent*

**Phyics**

Two rockets are flying in the same direction and are side by side at the instant their retrorockets fire. Rocket A has an initial velocity of +5800 m/s, while rocket B has an initial velocity of +9100 m/s. After a time t both rockets are again side by side, the displacement of...

*September 23, 2013 by math question?*

**physics 1**

Two rockets are flying in the same direction and are side by side at the instant their retrorockets fire. Rocket A has an initial velocity of +6700 m/s, while rocket B has an initial velocity of +9700 m/s. After a time t both rockets are again side by side, the displacement of...

*January 28, 2014 by Anonymous*

**physics**

Two rockets are flying in the same direction and are side by side at the instant their retrorockets fire. Rocket A has an initial velocity of +4100 m/s, while rocket B has an initial velocity of +9400 m/s. After a time t both rockets are again side by side, the displacement of...

*September 7, 2014 by S*

**Physics**

Two rockets are flying in the same direction and are side by side at the instant their retrorockets fire. Rocket A has an initial velocity of +4800 m/s, while rocket B has an initial velocity of +9000 m/s. After a time t both rockets are again side by side, the displacement of...

*September 26, 2014 by Anonymous*

**Science, Chemistry**

Hess's law ____. A) makes it possible to calculate ΔH for complicated chemical reactions B) states that when you reverse a chemical equation, the sign of ΔH does not change. C) determines the way a calorimeter works D) describes the vaporization of solids Highly ...

*May 9, 2014 by Samantha Taylor Greenfield*

**trig**

use an inverse trig function to write è as a function of x (There is a right triangle. The hypotenuse is 2. è is the angle between the base and the hypotenuse. The base/adjacent side of è is (x + 1) The side opposite è does not have a value.) a) è = sqrt [4 - (x + 1)^2] ...

*March 30, 2011 by Sushmitha*

**7th grade math**

Can you help with geometry? 1. Sally constructs a triangle with one side 6 inches long and another side 8 inches long. What is the 3rd side? (haven't learned Pythagorean theorem) Ans: 6 + x > 8 x > 2 6 + 8 > x 14 > x 8 + x > 6 x > -2 so, x must be > 2, but...

*February 27, 2015 by Alexis*

**Algebra**

The perimeter of a rectangle equals the sum of its lengths of its 4 sides. If the width of a rectangle is 4 inches and its perimeter is 38 inches, find the length of the rectangle.

*March 16, 2013 by Libby*

**algebra**

The perimeter of a square is 12cm greater than that of another square. It's area exceeds the area of the other by 39cm^2. Find the perimeter of each square. I don't get how to set this up.

*September 10, 2013 by Tim*

**grade 3 math**

1) what is the greates perimeter of a rectangle with an area of 39 square feet? 2) What is the least perimeter of a rectangle with an area of 32 square feet? 3) A rectangle has an area of 42 square inches. Which has a greater perimeter, the rectangle with the dimensions 21 x2 ...

*April 29, 2014 by mimi*

**geometry**

The lengths of the sides of a rectangle become 4 times greater than the original measurements. Which statement is true about the rectangle? A. Its area becomes 4 times greater, and perimeter becomes 16 times greater. B. Its area becomes 16 times greater, and perimeter becomes ...

*February 15, 2012 by need Help*

**college**

A car weighing 15,000 N is speeding down the highway at 90 km/h. What is its momentum?

*June 29, 2010 by april*

**science**

what units would you use to measure the speed of a car on the highway?

*August 27, 2010 by kahy*

**math**

A section of the highway rises 15 feet in a mile, calculate the grade.

*July 13, 2014 by Diane*

**social studies**

which two cities of nepal are connected by siddhartha highway?

*September 23, 2014 by ashish*

**calculus**

proponents of the peak oil theory claim that worldwide production of petroleum will soon reach a maximum and start to decline. (there is considerable debate about how soon this will occur) let P(t)= the world's rate of petroleum production t years after 2000. let T be the date...

*April 27, 2011 by Caren*

**Sign Language**

Hi I would like for my answers to be checked for these two questions (Note: I'm not sure if the 2nd one is correct): 1. Several school-related words are based on which sign? a. book b. learn c. school d. study My Answer: book 2. How do you change a statement in American Sign ...

*February 23, 2016 by Jazmine*

**Finance**

When a company’s executives purchase securities of their company and disclose it to the public: A) It is considered illegal B) This strategy is considered a Flight to Quality C) The market does not react D) It is generally seen as a positive sign for the company E) It is ...

*February 25, 2012 by Stephanie*

**math**

find the cost of cementing a driveway that is 900 cm wide by 1600cm long by 3 cm thick. The price per cubic centimeter is $5.20.

*March 5, 2014 by Shawn*

**Trigonometry**

Determine the circumference of a circle with 7.4 centimeter radius. (Use 3.14 ) Im not trying to get this completely answered. I just need help with what to do first. Thank you so much.

*January 9, 2017 by Kayla*

**Math**

Two equilateral triangles are sitting side-by-side. The length of one side of Triangle A is 5 ft. The sides of Triangle B are 3 times as long as those of Triangle A. How long is the length of one side of Triangle B?

*January 29, 2015 by Patricia*

**math**

In triangle ABC, side AB = 17 inches and side BC = 25 inches. What could be the length of side AC?

*March 6, 2011 by Julia Maloney*

**math**

in a triangle /one side is x/one side is x+1/another side is 20/if it is true and what is value of x

*October 21, 2012 by lewisville*

**Maths**

The longer side of a rectangle is X meters while the shorter side is Y meters,the longer side is at least 10cm and the shorter side is less than 10cm.

*June 16, 2016 by Sequence and series*

**math**

find the missing length in this diagram showing a T-square. (reduce the radical to simplist form. 6 cm (one side of triangle) 3 cm ( other side of triangle) the third side (diagonal line conecting other two sides)= x cm.

*March 3, 2010 by veronica*

**Math**

The perimeter of rectangle Z is equal to its area.Rectangle Y has the same perimeter as rectangle Z.The length of rectangle Y is 5 inches and width of rectangle Z.

*April 26, 2013 by Iveth*

**physics**

To say a substance is electrically polarized is to say that its net charge is ____________________. A) either negative or positive, but relatively weak.B) weakly positive in sign.C) None of these.D) is normally zero with opposite charges on opposite ends.E) weakly negative in ...

*April 10, 2012 by Jim*

**MATH**

i need help filling this out! 4x-10=32-3x 4x-10+____=32-3x+22 ____-10+____=32+_____ ___=___ ___=___ x=___ ok you need to solve for x. remember the rule, whatever you do on the left side, you do to the right side and vice versa. on the second step, they add 22 to the right side...

*October 24, 2006 by alejandra*

**Sign Language**

Deaf Music is music played by Deaf musicians only*** is music by hearing artists about Deaf people is music interpreted into American Sign Language expresses what being Deaf means

*May 9, 2016 by Kiki*

**Math**

Hannah plans on going hiking most of the day. It is recommended that she takes at least 3 liters of water with her. She packed 3 water bottles. The bottles she brought are cylinders with a radius of 3cm and a height of 30cm. What is the volume of one bottle to the nearest ...

*November 12, 2013 by Elle*

**geometry**

The perimeter of triangle ABC is 13 cm. It was dilated to create triangle A'B'C' The perimeter of triangle...is cm

*August 31, 2016 by erika*

**raiots and perimeter**

you have to figures that are similar, large one is 28yds, and the smaller one is 8yds. give the ratio of the perimeter and the ratio of the areas of the larger figure to the small one. Can someone please help not just answer but explain

*April 16, 2012 by kevin*

**Science**

a 51.0 kg uniform square sign, of edge L = 2.00 m, is hung from a horizontal rod of length dh = 3.00 m and negligible mass. A cable is attached to the end of the rod and to a point on the wall at distance dv = 4.00 m above the point where the rod is hinged to the wall. (a) ...

*December 13, 2008 by Phillipe*

**Math**

A piece of paper is cut into 25 equal parts that are similar in shape to the original. what is the perimeter of one of the small pieces divided by the perimeter of the original piece of paper?

*July 23, 2012 by Sarah*

**10th grade**

geometry in Triangle xyz, ab is a midsegment of xyz. ax is = 26, bz=36 ay is congruent to ax and bx is congruent ot bz. I get that side yx = 52 and side yz is equal to 72 how do you get the value of side yz? is it 72?

*April 15, 2010 by Anonymous*

**pre calc**

area of triangle XYZ given:side z=11 side x=7 and side y=13 what are the angles and area please? please explain

*December 8, 2011 by jim*

**Math**

The adjacent side of parallelogram are 36 cm and 27 CM in length if the distance between the shorter side is 12 cm find the distance between the longer side

*August 6, 2016 by Ayush*

**geometry**

in quadrilateral ABCD AC is a diagonol, m<ACD=2x+4 and m<ACB=5x-11 what proves ABCD a rhombus

*November 30, 2011 by Carly*

**Geometry**

ABCD is a rhombus. Explain why triangle ABC is congruent to triangle CDA.

*December 14, 2012 by BaileyBubble*

**farmingdale**

in rhombus abcd the measure in inches of ab is 5x+7 and dc is 2x+25 find the number of inches in the length of dc

*January 11, 2013 by dana*

**math**

in rhombus abcd the measure in inches of ab is 5x+7 and dc is 2x+25 find the number of inches in the length of dc

*January 11, 2013 by liz*

**Math**

The sum of the lengths of any two sides of a triangle must be greater than the third side. If a triangle has one side that is 22 cm and a second side that is 2 cm less than twice the third side, what are the possible lengths for the second and third sides?

*October 21, 2014 by DyEsha*

**Math**

I just wanted to double check that I am correct. Answer is in Interval Notation. 1. Solve: |x|<7 Work: -7>x<7 Answer: (-7,7) 2. Solve: |x|>_ 7 Work: -7<_ x >_ 7 Answer: ( - infinity sign, -7] U [7, infinity sign)

*September 9, 2014 by M*

**English**

1. The children lay down on their stomachs. 2. The children lay down on their belleies. 3. The children lay down on their fronts. (Which expressions are right?) 4. Lay on your right side on the floor. 5. Lay on your left side on the floor. 6. Lay on your front side on the ...

*May 9, 2016 by rfvv*

**Geometry**

In rhombus PQSR, PQ=y+8 and QS = 4y-7. Find PQ. Also... In rectangle ABCD,AB=x+15, BC=x-8, and CD=2x+3. Find: 1)x. 2)AB 3)BC Thanks!

*March 5, 2010 by Chris*

**Math**

In a rhombus all angles are right angles. True or False?

*January 11, 2011 by James*

**Math**

How many real roots does f(x) = x^3+5x+1 have? x^3 = odd polynomial = at least 1 real root Can I follow Descartes' rule for this? No sign change, so there aren't any positive zeros. when I sub in -x for x (-x)^3+ 5(-x) + 1 = -x^3-5x+1 Then there is one sign change, so 1 ...

*May 31, 2008 by Marissa*

**statistics**

Sign in Assume that the mean score on a certain aptitude test across the nation is 100, and that the standard deviation is 20 points. Find the probability that the mean aptitude test score for a randomly selected group of 150 8th graders is between 99.5 and 100.5. Sign in

*May 20, 2012 by m elissa*

**Geometry**

IS Evrey rectangle a square or is evrey rhombus a paralleogram. I forgot these things need help!

*May 12, 2008 by Nolan*

**math**

Suppose that a given parallelogram is not a rhombus or a rectangle. Which of the following can you conclude about this parallelogram?

*October 8, 2009 by thomas*

**geometry**

7. Verify that parallelogram ABCD with vertices A(–5, –1), B(–9, 6), C(–1, 5), and D(3, –2) is a rhombus by showing that it is a parallelogram with perpendicular diagonals.

*December 8, 2011 by jasmine*

**geometry**

Verify that parallelogram ABCD with vertices A(–5, –1), B(–9, 6), C(–1, 5), and D(3, –2) is a rhombus by showing that it is a parallelogram with perpendicular diagonals

*December 12, 2011 by cindy*

**calculus**

A farmer has 180 feet of fence and wants a pen to adjoin to the whole side of the 120 foot barn as shown. What should the dimentions be for maximum area. Note that in this case Write the equation for perimeter of the three sided rectangle. Write the equation for area in terms ...

*May 23, 2007 by Anonymous*

**Math**

2 expression for the perimeter of a square 1 with brackets and 1 without The shape is a square and t+3 is 1 side of the square P(with brackets) P(without brackets)

*November 18, 2013 by Aisha*

**algebra**

Set the equations equal to each other so you can determine when the car and bus are the same distance from the intersection. Collect all the terms on the left side of this new equation., leaving 0 on the right side. Factor the expression on the left side of the equation.

*March 3, 2013 by sam*

**math**

lauren wants to put a border around the perimeter of her room.the room is 13feet long and has a perimeter of 48 feet.how long is the room?

*September 24, 2007 by kay*

**Math**

A regular hexagon with a perimeter of 24 meters is dilated by a scale factor of 5 2 to create a new hexagon. What is the perimeter of the new hexagon?

*April 23, 2014 by Jordan*

**math**

If two parallelograms are similar,what do you know about the ratios of the two side lengths within one parallelogram and the ratios of the corresponding side lengths in the other parallelogram? the aswer is the scale factor is the ratios would be the side length of the ...

*November 26, 2006 by chemiii*

**Math**

The perimeter of a rectangle is 74 centimeters. The width is doubled and the length is halved. The new rectangle has a perimeter of 76 centimeters. Find the dimensions. Okay, so in class we're learning about Systems of Equations. What are the equations for this? How do I ...

*February 15, 2010 by Sammi*

**English**

Edgar Allan Poe uses foreshadowing in "The Cask of Amontillado" to create mystery in which of the following quotes? A. "he had on a tight-fitting parti-striped dress, and his head was surmounted by the conical cap and bells." ****** B. "and as for Luchresi, he cannot ...

*May 18, 2015 by angie*

**7th Grade Math**

The area of a certain rectangle is 288yd^2.the perimeter is 68yd.if you double the lengths and widths,what will be the new area and perimeter of the new rectangle be?

*February 11, 2013 by Alayah*

**math**

Joey's playhouse has a perimeter of 28 feet. What could be the dimensions of the playhouse? Draw a model and label the length and width. Show that the dimensions equal a perimeter of 28 feet.

*April 7, 2015 by Gabrielle*

**chemistry**

N2H4(g) + H2(g) 2 NH3(g) H1 = –1876 kJ 3 H2(g) + N2(g) 2 NH3(g) H2 = –922 kJ The H f for the formation of hydrazine: 2 H2(g) + N2(g) N2H4(g) will be ? kJ/mol. Turn equation 1 around and change the sign of H1. Add to equation 2, cancel like molecules appearing on both sides...

*February 9, 2007 by nick*

**Quick Question #2 (URGENT)**

How would show/ask 'What is your phone number?' in symbols and pictures. Would having a picture of a telephone and the number sign beside it, and write equal sign then question mark demsonstrate this question? Example: phone pic (#)=? If my idea doesn't demonstrate the ...

*September 11, 2009 by John*

**chemistry**

A sample of neon gas used in a neon sign occupies a volume of 3.90 L at a pressure of 580 torr. Calculate the volume of the gas if the pressure in the glass tube of the sign is 783 torr.

*April 24, 2012 by Anonymous*