All Questions ⁺⁰237788 Questions

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474

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Teach me .........help x100000😰😰😰

There were some children in the hall. If 83 boys were to leave the hall, the number of boys left will be 75% of the number of girls. If 92 girls were to leave the hall, the number of boys will be 1 1/4 the number of girls left. How many children were there read more ..

Guest Aug 30, 2016

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444

0

Difficult math prob pls teach me

Helen bought some guavas and star fruits in the ratio of 7 : 5. After selling 164 guavas and 95% of the star fruits, the ratio of the guavas to starfruits left became 2 : 3. How many fruits did Helen have in the end?

Guest Aug 30, 2016

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433

1

Very very hard question help needed

A rectangular tank with a base area of 3600cm^2 and a height of 50cm contained some water. Tap X with water flowing out at a rate of 1.2 liter per minute was turned on at 0930 h to fill the tank. At 0945, Tap Y was turned on to drain water out of the tank read more ..

Guest Aug 30, 2016

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373

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If you can answer this u are a math expert

Mr Li wanted to buy 200 boxes of apples but found that he was short by $300. He decided to buy 160 boxes instead and had $180 left. After that, he sold the apples for 30 cents each. 95 of the apples were rotten but he sold all the rest of the apples. If read more ..

Guest Aug 30, 2016

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380

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fractions

how to multiply fractions

Guest Aug 30, 2016

0

655

2

Prime or Composite.....

Is the number [10^51 + 121] prime or composite? Thanks for help.

Guest Aug 30, 2016

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398

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Find the solution sets. (system of nonlinear eq.)

y=1/3(x-3)^2 - 3
(x-3)^2 + (y+2)^2 = 1

Guest Aug 30, 2016

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371

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someone help

does variables work on this calculator

Guest Aug 30, 2016

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370

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proportions

how do you do proportions

Guest Aug 30, 2016

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407

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Determine

Determine
lim x -> 1 f(x)
f(x) = { 13-x^2, x < or equal to 1
11 - x, x > 1 read more ..

Guest Aug 30, 2016

0

730

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find the area of the parallelogram that has vectors as adjacent sides u = -2i +j +5k v = 4i -3j -3k

find the area of the parallelogram that has vectors as adjacent sides
u = -2i +j +5k
v = 4i -3j -3k

I know that area of parallelogram using vectors u and v
= | u X v |
I have
u = (-2,1,5) read more ..

Guest Aug 30, 2016

0

1605

1

the length of each side of a square is decreased by 20% , find the percentage change in its area

the length of each side of a square is decreased by 20% , find the percentage change in its area
Help!!!!!!!

Guest Aug 30, 2016

0

659

1

+84

solve the system of equations

solve the system of equations
{ y^2 + x^2 = 10
y+x = 4

ballhopper Aug 30, 2016

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1259

2

Find the equation of the hyperbola with vertices (4,0) (-4,0) and focus (7,0)

Find the equation of the hyperbola with vertices (4,0) (-4,0) and focus (7,0)

Guest Aug 30, 2016

0

1718

1

Find a unit vector orthogonal to u and v

Find a unit vector orthogonal to u and v
u = -3i -j +k
v = -3i +2j +3k

Guest Aug 30, 2016

0

822

4

+84

Give the coordinates of the circles center and its radius

Give the coordinates of the circles center and its radius
(x-7)^2 + (y+4)^2 = 16

ballhopper Aug 30, 2016

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541

0

+84

Give the coordinates of the circles center and its radius

Give the coordinates of the circles center and its radius
(x-2)^2 + (y+9)^2 = 1

ballhopper Aug 30, 2016

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653

1

+84

Give the coordinates of the circles center and its radius

Give the coordinates of the circles center and its radius
x^2 + y^2 - 16 = 0

ballhopper Aug 30, 2016

0

1392

1

+351

Math Challenge Question #2 Answer

Last time, I gave you guys this problem:
What is the value of X?

The answer is read more ..

Mathhemathh Aug 30, 2016

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514

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E notation to normal numbers

What is 2.64666496237969e+21 in long form? I.e 10 quadrillion

Guest Aug 30, 2016

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