Wednesday

August 24, 2016
**Math, Year 10, Simult. Equations**

How can i know if two lines/equations intersect on a graph, algebraically? For example, I have two equations: 1. -x^2 + 3x + 4, and 2. x - 4 Ty in advan.
*Wednesday, June 8, 2016 by Anonymous*

**math**

samaira spends2/5 of her pocket money to buy chocolates and gives1/9 of the remaining money to her sister she spends 3/4 of the rest of the money to buy a book and saves rest of it the fraction of money saved by her is
*Wednesday, June 8, 2016 by vinita*

**Math**

1. Subtract (4x + 2y) – (8x – 3y). –4x – y 12x – y 12x + 5y –4x + 5y 2. Determine the best name for the quadrilateral. Graphic rectangle rhombus trapezoid parallelogram 3. Which figure has rotational symmetry for an angle of rotation of 270°? ...
*Wednesday, June 8, 2016 by Help me PLEASE*

**Math**

Let a, b, and c be unit vectors, such that a+b+c=0. Show that the angle between any two of these vectors is 120 degrees. I proved this geometrically, but now my teacher wants a proof using vectors, and I don't know what to do.
*Tuesday, June 7, 2016 by Katie*

**math**

A toy rocket is launched straight up into the air with an initial velocity of 60 ft/s from a table 3 ft above the ground. If acceleration due to gravity is –16 ft/s2, approximately how many seconds after the launch will the toy rocket reach the ground?
*Tuesday, June 7, 2016 by mitch*

**math**

100*158
*Tuesday, June 7, 2016 by pradeep*

**math**

Find the foci of the ellipse whose major axis has endpoints $(0,0)$ and $(13,0)$ and whose minor axis has length 12.
*Tuesday, June 7, 2016 by rui rui*

**Math (Circle Equations)**

Write an equation with a radius of 2 inches and center point (-5,2) Would it be: (x+5)^2+(y-2)^2=2^2 ?
*Tuesday, June 7, 2016 by Giovanni*

**Math**

1. What is the area of the circle in terms of pi? The diameter is 4.9. A) 9.8 pi m^2 B) 12.005 pi m^2 C) 6.0025 pi M^2 D) 24.01 pi m^2 I've redid this problem over and over again, and I keep getting an answer that isn't one of the choices. The closest my answer is to ...
*Tuesday, June 7, 2016 by Tim*

**Math help plz?? **

24. A radio signal travels at 3.00 x 10^8 meters per second. How many seconds will it take for a radio signal to travel from a satellite to the surface of Earth if the satellite is orbiting at a height of 3.54 x 10^7 meters? im guessing its 118 seconds but im not sure..
*Tuesday, June 7, 2016 by othilia *

**Math(PleaseHelp, NewEquation SameDescription)**

Orienteering is a sport that involves navigating your way to a series of checkpoints with the aid of a map and compass. The goal is to find each point on the map as quickly as possible. A typical compass used for orienteering is divided into 360 degree where 0 degrees is north...
*Tuesday, June 7, 2016 by Cameron*

**Math**

1. The volume of a sphere is 1476 pi m^3 . What is the surface area of the sphere to the nearest tenth? A) 629.9 m^2 B) 672.4 m^2 C) 1,344.8 m^2 D) 1,973.5 m^2 Is the answer D?
*Tuesday, June 7, 2016 by Tim*

**Math**

1. O is the center of the given circle. the measure of angle O, is 134. The diagram is not drawn to scale. Assuming that the lines that appear to be tangent are tangent, what is the value of x? A) 67 B) 46 C) 314 D) 268 can someone please help? I saw an example with X having ...
*Tuesday, June 7, 2016 by Tim*

**math**

A grapefruit is 8% heavier than an orange, and an apple is 10% lighter than the orange. By what percent is the orange heavier than the apple?
*Tuesday, June 7, 2016 by Anonymous*

**math**

Constructing a parallelogram which size is 6cm and 9cm the angle between size being 60 degree menion the diagonal
*Tuesday, June 7, 2016 by adrian jackson*

**Math (Polar to Cartesian Equation)**

Convert the given polar equation to a Cartesian equation. r^2=4sec(theta)csc(theta)
*Tuesday, June 7, 2016 by Ray*

**Math**

Prove that the following Trigonometric Identity is valid: 1/(sin(y)-1)-1/(sin(y)+1)=-2sec^2 (y) Please any help or clues on how to do this is needed. I have a sheet that tells me valid identities but nowhere on it has info on -2sec^2 (y) I am sooo ...
*Tuesday, June 7, 2016 by kat*

**math**

a piece of wood is divided into three pieces in the ratio 3 : 4: 2. the length of the longest piece is 72 cm. calculate the length of the pices of wood
*Tuesday, June 7, 2016 by anaon*

**Math**

What is the value of "x" if 25^2=x? 1.)125 2.)0 3.)625 4.)5
*Tuesday, June 7, 2016 by :)*

**Math**

1. The length of the hypotenuse of a 30-60-90 triangle is 7. Find the perimeter. A) 7/2+21/2 sqrt 3 B) 21+7 sqrt 3 C) 7+21 sqrt 3 D) 21/2 + 7/2 sqrt 3 Could someone please help me, I don't know how to do this. Thank you!
*Tuesday, June 7, 2016 by Tim*

**Math**

1. In ABC, A is a right angle, and m B=45*. Side CA also has a length of 17ft just to let everyone know. What is the length of BC? If the answer is not an integer, leave it in simplest radical form. The diagram is not shown to scale. A) 54 ft B) 17 sqrt 3 ft. C) 17 sqrt 2 ft. ...
*Tuesday, June 7, 2016 by Tim*

**Math**

1. A square is __________ a rectangle. A) always B) sometimes C) never D) inconclusive One site about rectangles said, yes. But I'm not sure that's the answer.
*Tuesday, June 7, 2016 by Tim*

**Math**

3. A quadrilateral ____________ has one pair of parallel sides. A) always B) sometimes C) never D) inconclusive Is the answer B? I kinda wanna say D, but I believe it's B.
*Tuesday, June 7, 2016 by Tim*

**Math**

1. What is the equation of the circle with center (-4,-3) that passes through the point (6,2)? A) (x-4)^2+(y-3)^2=25 B) (x-4)^2+(y-3)^2=125 C) (x-(-4))^2+(y-(-3))^2=25 D) (x-(-4))^2+(y-(-3))^2=25 I'm really not sure how to do this at all, so any help would be absolutely ...
*Tuesday, June 7, 2016 by Tim*

**math**

A park is in the form of a rectangle 100 m×80 mat. At the centre of the park there is a circular lawn. The area of the park excluding the lawn is 4150 m^2 find the radius of the circular lawn
*Tuesday, June 7, 2016 by Neha*

**Math(DifferentQuestion,SameDescription)**

Orienteering is a sport that involves navigating your way to a series of checkpoints with the aid of a map and compass. The goal is to find each point on the map as quickly as possible. A typical compass used for orienteering is divided into 360 degree where 0 degrees is north...
*Tuesday, June 7, 2016 by Cameron*

**Math**

The sum of three consecutive numbers is 66.Form an equation to represent this information and find these numbers
*Tuesday, June 7, 2016 by Hazel*

**Math**

35 1/2% to the nearest thousandth
*Tuesday, June 7, 2016 by Nana*

**math**

Lolita saved $ 5000 in a saving account which pays 12% interest compounded monthly. Eight months later she saved another $ 5000. Find the amount in the account two years after her first saving.
*Tuesday, June 7, 2016 by omar*

**Math Help Please**

What are the ratios for sin A and cos A? The diagram is not drawn to scale. Triangle Description- AB = 29 AC = 20 BC - 21 A. sin A = 20/29, cos A = 21/29 B. sin A = 21/29, cos A = 20/21 C. sin A = 21/29, cos A = 20/29****? D. sin A = 21/20, cos A = 20/21 Please help and explain!
*Tuesday, June 7, 2016 by Battia Anne*

**Math**

A pharmaceutical salesperson receives a monthly salary of $2500 plus a commission of 7 percent of sales. Write a linear equation for the salesperson monthly wage in terms of monthly sales.
*Tuesday, June 7, 2016 by Dave*

**math**

amy has60 wooden beads she has 4 times as manyas glass beads how many glass beads does amy have?
*Tuesday, June 7, 2016 by Nuriffah farhana*

**Math (money) **

After spending $200 of her money on a dress. Lily spent 20% of her remaining money on a bag. She then spent $131 on a pair of shoes. In the end, she had 20% of the original amount Lily had at first. What is the original total amount she had at first? My work so far: 1/5 saved ...
*Tuesday, June 7, 2016 by user1234*

**MATH**

In a race, a triathlete runs 1/3 of total distance, cycles 2/5 of the total diatance and swims the ramaining distance. he swim 1.200 meters. What is the total distance of the race?
*Tuesday, June 7, 2016 by Martha*

**Math (Trig)**

Suppose the point A is on a circle of radius 6 with an angle of 240 degrees. Find the value of the coordinates of this point. Round your results to 3 decimal places. So in this case, x=rcos(theta) y=rsin(theta) x=6cos(240) y=6sin(240) Rounding to 3 decimal places: x=-3 y=-5....
*Tuesday, June 7, 2016 by Giovanni*

**math**

find a number such that its two-fifth is 12.
*Monday, June 6, 2016 by tushar*

**Math**

0=1/9x+10/7y+8/7
*Monday, June 6, 2016 by Anonymous*

**Math**

Orienteering is a sport that involves navigating your way to a series of checkpoints with the aid of a map and compass. The goal is to find each point on the map as quickly as possible. A typical compass used for orienteering is divided into 360 degree where 0 degrees is north...
*Monday, June 6, 2016 by Cameron*

**Math**

Jason measured rainfall for a science project. Last week it rained 3 1/8 inches in all. This week it rained 1 7/8 inches in one day and 2 3/4 inches on another. How many more inches did it rain this week then last week? Please explain how you got your anwser
*Monday, June 6, 2016 by Cindy*

**Math**

You decide to buy a 60 in plasma TV. You borrow $4300 from the electronics store at1.8% per month simple interest, with no payments due for 2 years from the date of purchase. How much will you owe on the loan after 15 months?
*Monday, June 6, 2016 by Mike *

**Math**

Kurt cut pizzas into wedges measuring 40 degrees. If each person eats one piece of pizza, how many people could he feed with two whole pizzas?
*Monday, June 6, 2016 by Lena*

**Math**

Orienteering is a sport that involves navigating your way to a series of checkpoints with the aid of a map and compass. The goal is to find each point on the map as quickly as possible. A typical compass used for orienteering is divided into 360 degree where 0 degrees is north...
*Monday, June 6, 2016 by Cameron*

**Math (*-*)**

which is least 3/10 3/7 3/4
*Monday, June 6, 2016 by Bryce*

**Math**

Maddie's bowling score was 230 last week, but only 190 this week. What was the percent decrease in Maddie's score? A. 1.74% B. 2.11% C. 17.4% D. 21.1%
*Monday, June 6, 2016 by Roman*

**algebra**

a math exam is marked out of 120. draw a conversion graph to change the following marks to percentages. a_80 b_110 c_54 d_72
*Monday, June 6, 2016 by emily*

**Math**

I sent this in a little while back but the file got corrupted and I have to re do it and I forgot the answer please if it is not done today I fail the year. Simplify the polynomial 16x^2 + 2 + 2x - 15x^2 - 1 + 14x A:31x^2 + 16x + 1*** B:x^2 - 12x + 1 C:x^2 + 16x + 1 D:x^2 + ...
*Monday, June 6, 2016 by Random*

**Math**

On friday I'm gonna hang out with two friends. What are the chances that one of them is a guy if: A: one is a girl B: one is a girl born in december You may assume the following things: - Female and male friends are just as likely in general - All months have the same ...
*Monday, June 6, 2016 by Anonymous*

**Please help with my grandsons math**

a snail travels about 0.13 cm in one minutes.how far would it travel in 7 minutes if it keeps up the same speed?About how long would it take to go 3 m?
*Monday, June 6, 2016 by Martha*

**Math**

The farmer has chickens and rabbit and has 200 legs and 72 heads how many chickens and rabbits are there
*Monday, June 6, 2016 by Anonymous*

**MATH**

A gardener is building a raised flower bed that measures 16′ long, 5′ wide and 1′ deep. If the gardener wants to fill the flower bed 3/4 full, how many cubic feet of gardening soil does he need to buy? 60 Is this right?
*Monday, June 6, 2016 by PENNI*

**Math**

Three jackals and three coyotes are on a trek across the Mokalani Plateau when they come to a river filled with carnivorous fish. There is a rowboat in sight, and the party decides to use it. (Both species are known for their cleverness.) However, the boat is too small for any...
*Monday, June 6, 2016 by Anonymous*

**math**

1. what are the equivalent fraction and decimal for 33 1/3% ? a 1/33 and 0.3 b 1/33 and 3 c 3 1/3 and 0.00 d 1/3 and 0.33 <-- my answer 3. Estimate 78% of 20 a 14 b 16 c 19 d 2 (help??)
*Monday, June 6, 2016 by anonymous *

**math **

Approximate to the nearest metre. 1m 40cm
*Monday, June 6, 2016 by Anosike *

**math**

If it is confirmed that, two thirds of the students of a COLLEGE are female, calculate the probability that on entering the college, the first two students one meet are; (i) The same gender (ii) Different gender
*Monday, June 6, 2016 by danbaba *

**Math :(**

A bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random. One marble is drawn and not replaced. Then a second marble is drawn. 1. What is the probability of selecting a purple marble and then a white marble? 2. What is the probability of selecting ...
*Monday, June 6, 2016 by Music Lover 14*

**7th Grade Math**

Use familiar figures to to find the area of the figure shown. Show all work. Since I can't provide a picture, here is the description. It looks like a rocket ship. There is a triangle with a width of 4 inches. A rectangle with a base of 3 inches and a width of 10 inches. ...
*Monday, June 6, 2016 by Music Lover 14*

**math**

Find each value if cos A=12/13 with 0 (degrees) <= A <= 90 (degrees) and if sin B=8/17 with 90 (degrees) <= B <=180 (degrees) 1. sin(A+B) 2. cos(A-B) 3. tan(A-B)
*Monday, June 6, 2016 by Sarah *

**math**

If line AB have midpoint (1,2) and gradient 0 with distance of 10 units find the coordinates of A and B
*Monday, June 6, 2016 by Summit*

**Math**

A car is stopped at a red light, and starts moving at time t = 0 when the light turns green, with an acceleration given by a(t) = √t, with t given in seconds, and distances given in metres. a) Find a formula for the velocity v(t), via integration. b) How long will it ...
*Monday, June 6, 2016 by Mr Homie*

**Math**

A car is stopped at a red light, and starts moving at time t = 0 when the light turns green, with an acceleration given by a(t) = √t, with t given in seconds, and distances given in metres. a. Find a Formul
*Monday, June 6, 2016 by Mr Homie*

**Math**

You order twelve burritos to go from a Mexican restaurant, five with hot peppers and seven without. However, the restaurant forgot to label them. You pick three burritos at random. Find the probability of the events (as a reduced fraction and as a percent rounded to the ...
*Monday, June 6, 2016 by Josh*

**math**

Order the following fractions from smallest to largest: 3/8, 1/3, 5/9, 2/5
*Sunday, June 5, 2016 by renita*

**math**

Use < , =, > to compare the following sums: 1/2 + 1/4 _______1/3 + 1/5
*Sunday, June 5, 2016 by renita*

**math**

Use < , =, > to compare the following sums: 1/2 + 1/4 _______1/3 + 1/5
*Sunday, June 5, 2016 by renita*

**Math (Right Triangle Trig)**

Suppose tan(theta)=5/7 and theta belongs to Quadrant III, find the exact value of sec(theta)? I already took the steps to solve this problem but I am confused if whether or not sec(theta)is positive or negative sqrt(74)/7 Any help is greatly appreciated!
*Sunday, June 5, 2016 by Giovanni*

**Math**

If the average speed for a trip is reduced by 20%, by what percent does the time change?
*Sunday, June 5, 2016 by quick*

**math**

The sum of three numbers is 89 . The third number is 3 times the second. The first number is 9 more than the second. What are the numbers?
*Sunday, June 5, 2016 by Zoey *

**math**

How do you change these fractions into equivalent fractions: 3/8, 1/3, 5/9, 2/5
*Sunday, June 5, 2016 by renita*

**math**

Order the following fractions from smallest to largest: 3/8, 1/3, 5/9, 2/5
*Sunday, June 5, 2016 by renita*

**math**

Ten years ago,father was twelve times as old as his son and ten years from now,he will be twice as old as his son. Find the present age
*Sunday, June 5, 2016 by micheal*

**Math **

A hat contains 3 marbles; one green, one blue, and one orange. Two marbles are selected at random without replacement from the hat. a) Determine the number of points in the sample space. b) Determine the probability of selecting exactly 1 ...
*Sunday, June 5, 2016 by David*

**Math**

Find the indicated probability. If P(A or B)equals=0.7 P(A)equals=0.3 and P(A and B)equals=0.15 find P(B). P(B)equals=
*Sunday, June 5, 2016 by David*

**Math**

As the earth revolves around the sun, distant objects can be seen from different locations. This idea can be used to measure the distance between earth and nearby stars and is called stellar parallax. To see how this process works, consider the simplified scenario below. A.) A...
*Sunday, June 5, 2016 by Cameron*

**Math **

Jackie earns a base pay of $3000 a month at her sales job. Jackie also gets a 15% bonus on all monthly sales. To make sure she can pay her bills for the upcoming month, Jackie needs to earn at least $4200. Write an inequality to represent this situatio
*Sunday, June 5, 2016 by Anonymous*

**Math-SineLaw**

Fire lookout towers are used to locate fires so they can be put out as soon as possible. These towers often work in networks and if two towers can see a fire at the same time, they can determine the location of the fire vey accurately. A.) Two forest rangers in towers see a ...
*Sunday, June 5, 2016 by Sydney*

**math,algebra**

As a fundraiser, Student Council sold two types of candy: lollipops for 40 cents each and chocolate bars for 75 cents each. On Monday, the students sold 150 candies and raised $74. How many lollipops did they sell?
*Sunday, June 5, 2016 by Xtian Zhou*

**math**

A triangle has a perimeter of 39 inches. If two sides are of equal length and the third side is 3 inches longer than either of the other two, how long is the longest side?
*Sunday, June 5, 2016 by dickson *

**Math**

Show that 1+((e^x-e^-x)/2)^2 = ((e^x+e^-x)/2)^2 Can someone explain how does the 1st equation is equal to the 2nd one
*Sunday, June 5, 2016 by Mr Homie*

**Math**

suppose U = {-10, -6, -2, 0, 3, 5} is the universal set and T is the set {-10, -6, 0}. what is the complement of set T?
*Sunday, June 5, 2016 by Danii*

**math**

a water pump has a capacity to fill water at 10 liters per second. How much time will it take to fill the water tank of 80cm .60cm.50cm?
*Sunday, June 5, 2016 by ajAy*

**Math**

A shopkeeper marked the price of an article a certain percent above cp and he allowed 16% discount to make 5% profit. If a customer paid rs.9492 with 13% vat to buy article by what percent is MP above CP of article?
*Sunday, June 5, 2016 by Gho*

**MATH**

THE PARALLEL CHORD OFA CIRCLE ARE OF LENGTH 6CM,RADIUS OF THE CIRCLE IS 5CM FIND THE DISTANCEBETWEEN THE CHORD
*Sunday, June 5, 2016 by PROMISE*

**MATH**

RADIUS OF A CIRCLE IS 13CM,DISTANCE OF THE CHORD FROM THE CIRCLE IS 12CM CALCULATE THE LENGTH OF THECHORD
*Sunday, June 5, 2016 by PROMISE*

**MATH **

LENGTH OF A CHORD IS 8CM,RADIUS IS 5CM CALCULATE THE DISTANCE OF THE CHORD FROM THE CENTRE OF THE CIRCLE
*Sunday, June 5, 2016 by PROMISE*

**Math**

I am asked to graph a translated parabola,ok, that's pretty easy, but, then,it says that it must be dobe with a dilatation of 2, does that mean that my axis is going to be this way:2,4,6,8,10...??
*Sunday, June 5, 2016 by Paul*

**Math w/reply**

Hey there, just need help with these two. I need someone to help explain them to me/break them down. 1. gr 1/100=_____mg Answer: 0.6 2. 0.3mg= gr_____ Answer: 1/200 3. gr iii /ss= ______mg Answer: 210 Thank you in advance! *** REPLY: I did not get these answers. These are the ...
*Sunday, June 5, 2016 by Anonymous*

**Math**

A piece of wire is 76cm long.it is cut into two unequal parts and each part is bent into a square.the sum of the areas of two squares is 205cm^2.find the length of the shorter part of the wire.
*Sunday, June 5, 2016 by Lili ming*

**Math **

The sum of the ages of mingfa and his father is 34 years.in 4 years time,the square of mingfas age will be equal to his fathers age. Find mingfas present age.
*Sunday, June 5, 2016 by Lili ming*

**math**

The Area of a square is numerically less than six times its side list some squares in which this happen
*Sunday, June 5, 2016 by himanshi*

**math**

The diagonal of a rectangle measures 7,4 m and one side is 2,4 m.calculate the length of the other side.
*Sunday, June 5, 2016 by Ndiphiwe *

**math**

A lighthouse is 10 m high and is situated on a vertical cliff which is 70 m above sea-level.The beam of light from the is 192 m from the foot of the cliff.how long is the beam of light at that instant?
*Sunday, June 5, 2016 by Ndiphiwe *

**Math - surface area **

A land scape is preparing a circular flowerbed. The bed has a 12-foot diameter. He will need 13 plants per square yard. How many plants should he buy? Thank you.
*Sunday, June 5, 2016 by Jennifer*

**MATH**

A straight pipe carried water from reservoir(R) to a tap(T) and T are 2km a part horizontally and R 500m above the level.find lenght of the pipe.
*Sunday, June 5, 2016 by adebisi adewumi j*

**math**

find the lenght of the longest straight line which can be drawn on a rectangulelar chalkboard which measure 2.2m by 1.2m PLEASE HELP ME OUT
*Sunday, June 5, 2016 by adebisi adewumi j*

**math**

The sports master explained to the headmaster that 3 baseballs and 1 cricket ball weighed the same as 14 tennis balls. He also found that 1 baseball and 6 tennis balls exactly balanced 1 cricket ball. ‘That is interesting,’ said the headmaster, ‘and how many ...
*Sunday, June 5, 2016 by yato*

**math**

At a bus stop 20 students were standing in four groups. The first group contained four students more than the second. The second group contained one student less than the third. The fourth group contained twice as many students as the second group. How many students were in ...
*Sunday, June 5, 2016 by deezenut*

**Math**

A boy is 26 years younger than his father.In 3 years time, his age will be 1/3 his father's age.find the boys present age.
*Sunday, June 5, 2016 by John McCain *

**Math**

Amy and Ashley bike along the same trail. Amy bikes the entire trail at a speed of 20 mph and Ashley bikes it at a speed of 15 mph. Amy finishes biking the entire trail 8 minutes before Ashley. How many miles long is the bike trail?
*Sunday, June 5, 2016 by Anonymous*

**Math**

Calculate the perimeter of the triangle formed by the middle points of the sides of the triangle formed by points A(-8,6) B (2,5) and C (1,7) I've already got the distance between all the points given but I do not know what to do next. Can you help me?
*Saturday, June 4, 2016 by Julius*

**Math(Revised)**

Phoebe and Tucker are 48m apart. Phoebe looks up at an angle of 43 degrees to see a hot air balloon hovering in the sky directly between her and Tucker. Tucker looks up at an angle of 31 degrees to see the hot air balloon. A.) Explain how it could be determined who is closer ...
*Saturday, June 4, 2016 by Cameron*