# Posts by alya

Total # Posts: 38

**Algebra**

Kevin, Kyle, and Joe are brothers joe is 4 years younger than kyle and kyle is twice joe's age the sum if their age is 56, how old is each brother

*January 13, 2016*

**calculus 3**

determine the value of the constant α so that f(x,y) is continuous at (1,-1) if f(x,y): i)sin(x+y)/(x^(2 )– y^2 (x,y)≠(0,0) ii) α (x,y)=(0,0)

*May 2, 2012*

**calculus 3**

determine the value of the constant α so that f(x,y) is continuous at (1,-1) if f(x,y): i)sin(x+y)/(x^(2 )– y^2 (x,y)≠(0,0) ii) α (x,y)=(0,0)

*May 1, 2012*

**calculus 3**

∂^f/∂x∂y = ∂^2f/∂y∂x = -e^(-x)siny + e^(-y)sinx if i'm not mistaken...exist -e^(-x)siny is positive ( e^(-x)siny ) not negative... coz y difftation -siny and difftation -x is -1.. so (-)(-) is positive...

*May 1, 2012*

**calculus 3**

∂^f/∂x∂y = ∂^2f/∂y∂x = -e^(-x)siny + e^(-y)sinx ---> how we get this??

*May 1, 2012*

**calculus 3**

if f(x,y) = e^(-x)cosy + e^(-y) cosx find (∂^2 f)/(∂x^2 )+ (∂^2 f)/(∂y^2 )- 2(∂^2 f)/∂x∂y

*May 1, 2012*

**calculus 3**

find and sketch the natural domain of f(x,y)= √(x+y^2 )/(x^2+y^2 )

*May 1, 2012*

**FIZIK**

when you increase the current in a wire, what happen?

*April 17, 2012*

**PROBLEM SOLVING IN MATHEMATICS**

the number of students in a school doubles every month. if there are 14000 students in the school, how many students were there in the school four months ago?

*October 25, 2011*

**PROBLEM SOLVING IN MATHEMATICS**

The Andersons are buying a new home. They need to fence the yard because they have a dog. The yard is 72 ft. by 120 ft. Each fencing section is 8 ft. How many sections will they need? How many posts will they need? (a post is needed at the end of each section). What else will ...

*October 22, 2011*

**HELP-PROBLEM SOLVING IN MATHEMATICS**

yup.. pi.. so i want to know how to solve it

*October 15, 2011*

**HELP-PROBLEM SOLVING IN MATHEMATICS**

3.142

*October 15, 2011*

**HELP-PROBLEM SOLVING IN MATHEMATICS**

a piece of wire of length 136(pai) is cut to form 8 circles. the radius of the circles differ from each other, in sequence, by 1 cm. a) find the radius,r b) find the number of complete circles that can be formed if the original length of the wire is 190(pai)

*October 15, 2011*

**HELP-PROBLEM SOLVING IN MATHEMATICS**

probably the most famous approach to problem solving is Polya's four-step process. Describe the four-step process.

*October 14, 2011*

**PROBLEM SOLVING IN MATHEMATICS**

what do you need to know to solve this? you have kite ABCD. angle B is at the top of the kite and measures 80 degrees. angles A and C are on the sides and angle D is at the bottom of the kite. what is the largest siza that angle A or C could be?

*October 14, 2011*

**PROBLEM SOLVING IN MATHEMATICS**

the average age of a group of teachers and student is 20. the average age of the teachers is 35. the average age of the students is 15. what is the ratio number of teacher to number of students ?

*October 13, 2011*

**REPORT- HELP ME**

I want to know what needs to create a report on the contents of the subject problem solving .. lecture want us to write report every time after class runs out .. report on the subject that we learned during class that day ..so I want know what needs to be in the range of ...

*October 8, 2011*

**PROBLEM SOLVING IN MATHEMATICS**

there are two prime numbers between 100 and 199 such that the ten digits is a prime number, the ones digit is a prime number and the tens and ones digits taken together are a 2 digit prime number. find the sum of these 2 prime number.

*October 6, 2011*

**PROBLEM SOLVING IN MATHEMATICS**

you have 13 bags of gold wins. out of 13 bags gold coins, there is one bag gold coins lighter. assume that one real gold coins is 10g and the fake is 9g. now, you are given a electronic beam balance. find the most minimum ways to figure out which bag of gold coins is lighter.

*October 1, 2011*

**PROBLEM SOLVING IN MATHEMATICS**

you have 13 bags of gold wins. out of 13 bags gold coins, there is one bag gold coins lighter. assume that one real gold coins is 10g and the fake is 9g. now, you are given a electronic beam balance. find the most minimum ways to figure out which bag of gold coins is lighter.

*September 30, 2011*

**PROBLEM SOLVING IN MATHEMATICS**

you have 6 iron balls. 5 iron balls have equal weight and 1 iron ball is slightly lighter than the other 5 iron balls. you are given a libra. find ways (most minimum) to find out the light.

*September 28, 2011*

**physics - i need A.S.A.P**

A truck traveling at a constant speed of 30.6 m/s passes by a police car which is at rest. The police officer catches up to the truck in 700 m, maintaining a constant acceleration. i)Calculate how long it took the police's car to overtake the truck speeder

*May 2, 2011*

**fizik**

Two shuffleboard disks of equal mass, one orange and the other yellow are involved in a perfectly elastic glancing collision. The yellow disk is initially at rest and is struck by the orange disk moving initially to the right at 7.00 ms"1. After the collision, the orange ...

*April 11, 2011*

**fizik**

Two shuffleboard disks of equal mass, one orange and the other yellow are involved in a perfectly elastic glancing collision. The yellow disk is initially at rest and is struck by the orange disk moving initially to the right at 7.00 ms"1. After the collision, the orange ...

*April 11, 2011*

**fizik**

ball A move 30 degree from horizontal while ball B move 15 degree from horizontal.

*April 6, 2011*

**fizik**

A 2kg ball,A moves to the right with velocity 4 m/s collides with another 1kg ball,B moving in the opposite way with velocity 0.5m/s. after the collision, both ball move at 30 degree and 15 degree from horizontal. calculate the final velocity of each ball after the collision. ...

*April 6, 2011*

**statistic**

what should i know in topic hypothesis testing?

*March 14, 2011*

**sociology-HELP**

can i know the example of topic that related in education that can influence society????

*February 28, 2011*

**english**

it`s okay i paraphrase? 1) the regular food resource of melatonin only a new and dried cherries. the biochemical that controls the body`s internal clock to control a nap. researches analysis tart cherries and found high levels of melatonin recommend eating the cherries an hour...

*February 26, 2011*

**english**

can i know how to paraphrase : 1) fresh and dried cherries are one of the only natural food sources of melatonin, the chemical that controls the body`s internal clock to regulate sleep. researches who tested tart cherries and found high levels of melatonin recommend eating ...

*February 26, 2011*

**sociology**

what is digital device

*February 26, 2011*

**sociology**

what is " distraction hypothesis" ?

*February 26, 2011*

**physics**

can i know what the important thing that i should know in chapter force?

*February 22, 2011*

**fizik**

1. A sports car travelling east at 48.0 m/s passes a trooper hiding at the roadside. The driver uniformly reduces his speed to 22 m/s in 4.10 s a) Find the magnitude and direction of the car’s acceleration as it slows down b) Calculate the distance traveled during the 4....

*February 20, 2011*

**fizik**

can i know how to get Vaverage?

*February 20, 2011*

**fizik**

1. A sports car travelling east at 48.0 m/s passes a trooper hiding at the roadside. The driver uniformly reduces his speed to 22 m/s in 4.10 s a) Find the magnitude and direction of the car’s acceleration as it slows down b) Calculate the distance traveled during the 4....

*February 20, 2011*

**fizik**

i really need the answer quickly 1. Linda travels by car around one city to another with different constant speeds between pairs of cities. She travels for 35 min at 84 km/h, 17 min at 105 km/h and 50 min at 42 km/h and spends 25.0 min eating lunch and buying gas a) Determine ...

*February 19, 2011*

**physics**

The wavelength will change

*March 7, 2007*

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