Monday

March 2, 2015

March 2, 2015

Total # Posts: 172

**maths**

hi from cherie
*February 15, 2015*

**Math**

Solve this linear equation, y-x divided by 2=5 x-y divided by 5=13
*January 11, 2015*

**Math**

Could someone please help me. Solve the linear equation by substitution. Y=10-2.2x 5x+y=70 For the first equation I am getting x=21.4 and for the second equation I am getting y=-37. The answers are 21 3/7 and -37 1/7. Could you show me how you do this so I can see where I went...
*January 4, 2015*

**Math Linear Equations**

Two lines are drawn on a co-ordinate axis. The equation of the first line is y=-2,and the equation of the other line is y=3x+1. What are the co-ordinates of their intersection point? I have been on this for hours and can't figure out how to do this. Please help. Thank you
*January 2, 2015*

**Math-Linear Equations**

True or false? A line perpendicular to a line whose slope is -0.75 has a slope of 1.3 repeating. Please help me with this.Thank you
*January 2, 2015*

**Math**

Factor 2y^4+y^2-10y+5 Please help!thank you
*November 24, 2014*

**Math**

Choose any number for p. Determine whether the following equation is true. (2p-3)(p+4)=2p^2-5p-12 I don't think this is true. Am I correct?
*November 18, 2014*

**Math**

Solve (16x^2)^-3/4 Please help using step by step. I don't understand how to do this. Thank you
*November 16, 2014*

**Math**

Simplify (16x^8)^-3/4 1) 16^-3/4*(x^8)^-3/4 2) -12*x^-6 3) -12*1/x^6 4) -12/x^6 Which step is incorrect? Please help!!
*November 14, 2014*

**Math**

Simplify (27t^2)^2/3
*November 14, 2014*

**Math**

A mountain pine beetle population can double every year if conditions are ideal. Assume the forest in Jasper National Park,AB has a population of 20 000 beetles. The formula P=20 000(2)^n can model the population,P,after n years. a) How many beetles were there in the forest ...
*October 31, 2014*

**Math**

The formula l=8t^2/pi^2 represents the swing of a pendulum. In this formula, l is the length of the pendulum, in feet, and t is the time, in seconds, it takes to swing back and forth once. Whst is the length of a pendulum that makes one swing in 2s? Please help!! Thank you for...
*October 29, 2014*

**Analytical Chemistry**

Suggest a range of sample masses for the indicated primary standard if it is desired to use between 35 and 45mL of titrant: (a) 0.175 M HClO4 titrated against Na2CO3(CO2 product) (b) 0.085 M HCl titrated against Na2C2O4 Na2C2O4-->Na2CO3+CO CO3(2-)+2H(+)-->H2O+CO2 (c) 0....
*October 29, 2014*

**Math**

When a satellite is h kilometres above Earth,the time,t,in minutes,to complete one orbit is given by the formula t=Root of (6370+h)^3/6024 a) A telecommunications satellite is placed 30 km above Earth. How long does it take the satellite to make one orbit? b) A satellite is ...
*October 28, 2014*

**Math**

A manufacturer is designing an open, cube shaped box to hold a basketball. The basketball has a volume of 2304 Pi cm3. How much cardboard is needed to create the smallest box possible using the least amount of material? DO NOT include seam overlap in the calculations. Please ...
*October 22, 2014*

**Trigonometry**

Johns eyes are 6 ft from the ground. He is standing 70 ft away from a tree. If the angle of elevation is 24 degrees, then how tall is the tree?
*October 19, 2014*

**Math**

Please help. I'm sure I use tan but not able to figure this out. A rectangular prism has base dimensions of 24cm by 7 cm. a metal rod is run from the bottom corner diagonally to the top corner of the prism. If the rod forms an angle if 40 degrees with the bottom of the box...
*October 8, 2014*

**Math-trigonometry**

Please help me with the steps !i don't understand this. The working arm of a tower crane is 192m high and has a length of 71.6 m. Suppose the hook reaches the ground and moves along the arm of the trolley, a) determine max distance from hook to operator when trolley is ...
*October 8, 2014*

**Math**

Rectangle ABCD has been subdivided into 4 regions. The areas of two of these regions are a^2 and 144. The combined area of the other two regions is 25a. What is the perimeter of the rectangle ABCD? Please help and show steps! I don't have a clue how to do this. Thank you ...
*October 3, 2014*

**Trigonomrtry**

I had asked help for a question and Steve gave me this answer on how to set up equation 20-x/6.11=tan28 degrees The answer is approx 16.75 ft. I still don't know how to do this! When I do it I get different answer. Could you please break this down step by step so I can ...
*October 2, 2014*

**Trigonometry **

Hi this is a two part question. I got the first part but can't figure out second. Please help! A home is designed to keep sun off outside south wall during summer months and have wall exposed to dun as much as possible during winter months. The highest angle of sun in ...
*October 1, 2014*

**Trigonometry **

A wheelchair ramp has an angle of 6 degrees,side length 29ft and height 3ft. For a safe ramp,the ratio of vertical distance: horizontal distance needs to be less than 1:12. Would the ramp be considered a safe ramp? Please show me how to do this! Thank you
*October 1, 2014*

**Math**

A souvenir consisting of a cube with an inserted sphere is made to represent Earth. Both pieces are made out of solid crystal. The sphere replaces one quarter of the volume of the cube. Calculate the volume of the souvenir piece. The sphere has diameter of 4 cm and the cube ...
*September 24, 2014*

**Math**

Kendra wants to purchase a bead necklace made of Jade. The cost depends on the amount of Jade in the necklace. Each bead is 7 mm in diameter and there are 100 beads in the necklace. What is the amount of Jade in the necklace in cubic centimeters? Please can you help me with ...
*September 24, 2014*

**Math **

A cylinder has volume of 339.3cm^3 and height of 3cm. What is the radius? Please help! Can you show me the formula to use and the steps involved in getting the answer? Thank you for your time.
*September 24, 2014*

**Math**

A traditional Haida hand drum has a diameter of 14 7/8 in. and is 3 in deep. What is the minimum amount of hide used to make the drum if the hide covers only the top and lateral surfaces? PLEASE HELP!! Thank you
*September 22, 2014*

**Math**

A designer is designing a cylindrical punching bag. He wants to use a maximum of 1.3m^2 of material. He has determined that the diameter of bag should be 36cm. Determine the maximum possible height of the bag to nearest tenth if a centimeter. Please help and show steps on how ...
*September 18, 2014*

**Math**

Convert this measurement to hundreth of a kilometre. 26 mi 385 yd. Could you please show formula on how you got this answer? I am stuck I keep getting the answer as 16 km but the answer is supposed to be 42.19 km Thank you
*September 8, 2014*

**Math**

We have a picture frame with width being 3 1/4 inches and length unknown. We need to fit picture with width of 4 cm and length 4.6 cm into frame. What is the scale factor for enlargement? What is length of unknown side of frame? I was given the answer as the scale factor being...
*September 5, 2014*

**Math**

If I borrow $26,400 @ 7% interest and make payments of $300 how much will I have left owing after 19 months.
*August 16, 2014*

**Space Exploration**

Give two reasons why observatories are still being built on Earth instead of launching more space telescopes? I I'm assuming one reason is the cost but can't find another reason .
*May 1, 2014*

**Space Exploration**

List three subsystems of a SARSAT satellite and tell what the function of eCh subsystem is. Please help I can't seem to find them.
*April 29, 2014*

**Geometry **

Sandy decides to try golfing. She stands on the outer edge of a circular putting green. In the very center of this putting green is the hole;it is 8m away from where she is standing. Sandy is inexperienced. She hits the ball incorrectly and it veers directly to her left and ...
*April 23, 2014*

**Circle geometry**

The endpoints of the arms of an inscribed angle are the endpoints of a diameter. What is the measure of the inscribed angle? How do you know? Please help and please explain how I would draw a diagram of thus. Think you for your help!
*April 23, 2014*

**Astrology**

Why is it helpful to use the Celestial Sphere to find the position of objects in the night sky. Please help!, Thank you.
*April 17, 2014*

**Circle geometry**

Please help Explain how I figure this out. A circle has diameter 70cm. A chord in the circle is 50cm long. How far is the chord from the center of the circle? I have been stuck on this for days. I appreciate any help. Thank you!!
*April 10, 2014*

**Circle Geometry**

A wheel has radius 30 cm.It rolls along the ground toward a tack that is 58cm from the point where the wheel currently touches the ground. What is the distance between the tack and the closest point on the circumference of the wheel! I don't understand thus it all! Please ...
*April 9, 2014*

**Physics**

Why is using mirrors to generate electricity not a common practice?
*March 20, 2014*

**Physics**

A high efficiency natural gas furnace is 92% efficient. How many joules of output energy will 750kJ of input fuel provide? Please help! Thank you.
*March 17, 2014*

**Physics**

Ken has five 200W security lights on outside of home. How much energy do the security lights use in 8 hrs? If the cost of electricity is 8 cents per kWh,what is the cost of operating the security lights ? Please help I'm not sure which formula to use?
*March 12, 2014*

**Physics**

Does the solar powered calculator work when there is no bright light falling on the solar panel? Explain. I think it does but I don't know why please help explain this. Thank you
*March 10, 2014*

**Physics**

In a series circuit, the power source is 9-volt battery and three resistors. R1=7ohm R2=9ohm R3=2ohm What is the total resistance in this series circuit? What is the current? Please help I don't understand this!, Thank you
*March 10, 2014*

**Science**

Does a solar powered calculator work when there is no bright light falling on the solar panel? Explain
*March 6, 2014*

**Science**

What is a harmful effect of electrical resistance?
*March 6, 2014*

**Science**

What would happen if you moved the bar magnets further away from the armature when the St.Louis motor was running? Please help! I have been searching for r The answer for days and can't find it anywhere Thank you
*March 1, 2014*

**Science**

Why are generators not allowed in Niagara Falls? I am assuming that it has something to do with environment but I can't find the exact answer anywhere ?
*March 1, 2014*

**Science**

What three things can be done to increase the speed and power of a St.Louis electric motor?
*February 28, 2014*

**Science**

What would happen to an electric motor if the direction of the electric current in the armature did not change directions? Explain. I have read my textbook and googled it and I dint understand what would happen. Please help. Thank you
*February 28, 2014*

**Math**

Please help me with this!! The actual length of the picnic table is 180cm with legs 60cm. What is the scale factor for this diagram?
*February 27, 2014*

**Math**

Please Help!!, The dimensions of a photo of a mountain bike are 15cm by 12cm. An enlargement is to be made for a poster with dimensions 4.0m by 3.2m. What is the scale factor of the poster to the nearest tenth?
*February 24, 2014*

**Math**

Please help! 1.3-2.5x<or equal to -1.2x-0.52 The answer is x>or equal to 1.3 I have been on this for hours and can't figure it out Thank you
*February 14, 2014*

**Math**

Please Help!!!! I don't understand this at all. -(5f/6)-2/3>4/3 The neg sign is beside 5f/6
*February 14, 2014*

**Math**

Please Help!!!!!!! 1/2+4/7p>13/10 The p is beside 4/7. I have been stuck on this all morning any help and how it was solved would be appreciated. Thanks for your time and help.
*February 13, 2014*

**Math**

I have a triangle with one side 2y^2-3, a side with 2y^2+y+5, and the other side y^2+y+5. I had to write expression and simplify. This is what I got: (2y^2-3)+(y^2+y+5)+(2y^2+y+5) =5y^2+2y+7 I now have to determine the perimeter if y=3cm. I don't know how to do thus part ...
*January 28, 2014*

**Math**

The difference between two polynomials is (5x+3).One of the two polynomials is (4x+1-3x^2). What is the other polynomial? Please help! Thank you
*January 22, 2014*

**Science**

When would you want to have a corrosive reaction? I can find when you wouldn't want to have one but not when you wouldn't. Please help!! Thank you
*December 3, 2013*

**Science**

Citric acid has the formula C3H3OH(COOH)3. How many atoms of carbon,hydrogen and oxygen are in each molecule? Please help I don't understand this!! Thank you
*November 18, 2013*

**Science**

Please help I don't understand this! If the following compound is combined, how many if each would be needed to make electrically neutral compound? Fe(3+) &Cl(1-)
*November 5, 2013*

**Math**

(1/2)+3/5 /[9/10-(-3/5)]= I got 1.5 is this correct? If not could you please show me how to do this? If Steve answers thank you so much for all your help you are awesome:))
*October 30, 2013*

**Math**

Please help explain how to get answer! -8.6*14.6-5.3/[(-19.4)-8.6]/(-2.9)*6.3-(-9.5)
*October 30, 2013*

**Math**

(-1/2)+3/5/[9/10-(3/5)] I got 1/15 is this correct? I don't think so please help and explain how you did this :)
*October 28, 2013*

**Science**

Please help !!! A student wanted to determine the density of an object made of an unknown substance. She found the mass of the object was 335g. Then she did water displacement to determine the objects volume. The initial volume of the water was 50.0 mL. With the object ...
*October 27, 2013*

**Math**

Please help with this!!! 3/8-9/4[(-5/4)+(-1/10)] I cannot figure this out.
*October 24, 2013*

**Science**

In an experiment to find out how the proportion of cement in a concrete mixture affects the products strenghth what would be two controlled variables and what could a possible source of error in this experiment be ? Thank you for your help!
*October 22, 2013*

**Math**

How do I write -2.3 as a rational number?
*October 21, 2013*

**Math**

Is -6/5 greater than -5/6?
*October 21, 2013*

**Math**

-3/4-1/2 I get -1/4 but my dad is saying -1 1/4. Can you please help with the answer and explain how you came up with it? Thank you
*October 10, 2013*

**Science**

Why is it difficult to reestablish a species permanently into its natural environment once the total number of a species drop below a population of 500? Thank you for your help.
*September 27, 2013*

**math**

I am trying to figure out the surface area of a garage. It has an A shaped roof. There is an overhang of 0.5m on each corner. Do I include this in determining the area of the roof? I need to figure out how much stucco is needed for the garage minus roof, window, and door. If i...
*September 24, 2013*

**Science**

Why are the different gene combinations in the zygote important to survival of the species. Please help Thank you!!!!
*September 23, 2013*

**Math**

I have to determine the unknown length of a right triangke to the nearest tenth of a unit. One side is 7m and the base is 10m. I got a friend to do this and age came up with 7.1m as the answer. When I do the steps I get the answer 12.21. I believe my friend is right but need ...
*September 13, 2013*

**Math**

[(-1)^3]^4-[(-1)^4/(-1)^3]^2 PLEASE HELP!!! The answer i come up with does not match answer on calculator. The big brackets are confusing me. Please help to explain this. Thanks so much for your help especially Steve
*September 8, 2013*

**Math**

(3^2*4^3)^2-(4^4/4^2)^2 Please help explain how to do this. I am not sure how to do this ! Thank you
*September 8, 2013*

**Math**

3^4 /3^3 + 4^2 *4^0/2^4 Please help and explains how you got the answer. I have been stuck on this for awhile and am not sure how to do this. Thank you!
*September 6, 2013*

**Social Studies**

To what extent did the Japanese worldview change during the Meiji period.
*May 30, 2013*

**Math **

A spinner has three congruent sectors colored orange, green, and purple. Every spin has has 1/3 chance of landing on any color and there is 1/9 chance of landing on orange and then on purple. There is 1/3 chance of landing on same color twice in a row. I need to make a tree ...
*April 22, 2013*

**Math**

I really need help please!! Karen, Gavin, Nasra, and Ali each have a deck of cards. Each student randomly draws a card from the deck. Find the probability of each event. a) each student draws a club. b) Karen draws a red card, Gavin draws a king, Nasra draws a black card, Ali ...
*April 19, 2013*

**Math**

Karen, Gavin, Nasra, and Ali each have a deck of playing cards. Each student randomly draws a card from the deck. Find the probability of these events: a) Each student draws a club. b) Karen draws a red card, Gavin draws a king, Nasra draws a black card, Ali draws the 2 of ...
*April 18, 2013*

**Math**

Every time Jim shoots a free throw in basketball, he has an 80% chance of making the shot. He is given 3 free throws. Find the probability of each event. a) misses all 3 shots b) misses the first two shots and makes the third. Can someone please explain to me how to get the ...
*April 17, 2013*

**Bob pursley**

Sorry I misspelled your name in my previous post:)
*April 17, 2013*

**Math**

Each time Parker shoots a free throw in basketball, he has an 80% chance of making the shot. Suppose he is given 3 free throws. Find the probability of each event. a) Makes the basket, misses the basket, makes the baset b) makes all 3 shots Please help having hard time with this
*April 17, 2013*

**Math**

Please help I don't get how to do this! A spinner has three congruent sectors colored orange, green, and purple. Use the rule of probability of each event. a) landing on orange, then landing on purple b) landing on the same color 2 times in a row.
*April 16, 2013*

**Math**

Can someone please help me! A regular 6sided die is rolled three times. Find the probability of each event: a) Three 6s in a row b) 5,1,even c) Odd, greater than 2,5 Show all work I have been looking at examples and trying all night and I can't figure this out.
*April 10, 2013*

**Science**

Please please help this is the second time I have posted this question. Calculate the amount of work it will take to lift a lawn mower with a mass of 8kg onto the back of a truck which is 0.75m off the ground.show all conversions in your work.
*April 9, 2013*

**Math**

Every time Mr. Cold born throws a ball of paper in the garbage can, the probability the ball goes in the cans is 3/4. What is the probability he misses 2 times in a row? Please show all work. Please help I don't understand probability
*April 9, 2013*

**science**

A hydraulic jack is needed to raise an object with a force of 4000 N to a height of 3 metres above the ground. Will the jack do the job? (Answer after working through the rest of the question. I would really appreciate it if someone would please help me with this question. ...
*April 9, 2013*

**Math**

What is the probability of tossing two coins and having them both show heads? Show all work. Please help I don't understand this.
*April 9, 2013*

**science**

Calculate the work done by lifting a stack of books 0.5 m onto a table. The force you exerted eas 150N. Please help I am lost as how to do this
*April 5, 2013*

**science**

Convert 32 newton-meters to Joules. Please help!
*April 4, 2013*

**Social Studies**

Writeacher The period of time fir the social question is the Edo period. Sorry about thar!
*March 26, 2013*

**Social Studies**

How did social controls shape Japenese identity and citizenship. In your response be sure to discuss the areas of religion and class structure. Please help as I do not really understand the question
*March 26, 2013*

**Math**

The cost of Admission to a fair is $10, plus $3 per ride. An equation for this relation is C=10+3r, where r represents the number of rides a person goes on, and C represents the total cost of admission and rides. Make a table of values for the relation . Please help do not ...
*March 26, 2013*

**Math**

I need to make a table where y=-x using the numbers -3 to 3. I don't understand.
*March 23, 2013*

**Math**

Ms.Sue You helped me with a table but now I have to do one where y=-x using integers from -3 to 3. I am still unsure of how to do this. When I tried I got the same results as the previous table. I really appreciate your help and am trying very hard to understand this but am ...
*March 23, 2013*

**Math**

I have to make a table with y on one side and x on the other. y=x. I have to provide integer values of x from -3 to 3. I don't understand how to do this. Please help!
*March 23, 2013*

**Math**

Solve equation. -5(s-7) = 15
*March 22, 2013*

**Math**

Uncle Ritchie has some $10 bills in his wallet. He shares all of them equally among his 4 nieces and nephews. Each of the nieces and nephews then donates two $10 bills to charity. They then each have five $10 bills. How many $10 bills did Uncle Ritchie have in his wallet? a) ...
*March 22, 2013*

**Math**

Please help!!! Scott bought 54m of fencing to enclose a rectangular plot of land. The width of the rectangular plot is 12m. Assume Scott uses all the fencing. What is the length of the rectangular plot of land? a) choose a variable to represent the length of the rectangular ...
*March 22, 2013*

**Math**

Expand and simplify. 2(3+4y+7) I got 8y + 20 but I don't think this is the right answer.
*March 21, 2013*

**math**

A school uniform consists of a shirt and a pair of shorts. A shirt costs $22. A pair of shorts costs $15. Write an expression to find the cost of supplying n students with uniforms. Evaluate the expression for 8 students.
*March 20, 2013*