# algebra1

posted by .

I will be happy to critique your thinking.

can u use one of them and show me how to solve it and i'll do the rest? like i don't know how to do these and i need to know how.

assume that Q varied directly as x and inversely as y.

1) if x is tripled and y is doubled, what happens to Q?

2) if x is halved and y is doubled, what happens to Q?

3) if x is doubled and y is halved, what happens to Q?

4) in the formula F=m times pi times l squared over p, m and pi remain constant, l is halved, and p is doubled. how does F change?

Take number two.

Q varies directly as x and inversely as y. That means Q= k x/y where k is some constant.

If x is halved, and y is doubled..
reducing x by one half means q is reduced by one half. But y is doubled, which means x is halved again (q=k x/y)

So Q goes down to 1/4 or 1/2 *1/2 of the original.

Lets do it the math way now.

Let Qo be the value of kx/y

Q' is the new value.
Q' = k (1/2 x)/2y = 1/4 k x/y=1/4 Qo

so that means the last one, Q is didided by 4?

i don't understand how Q changes can u explain

## Similar Questions

1. ### Algebra

5. Find the x and y intercepts of each linear equation. Be sure to write your answers as ordered pairs. y = 3x - 6 6y = -x + 2 The y intercepts is when x=0 So put in x=0 in each, and solve for y. The x intercepts is when y=0, put in …
2. ### Algebra1!!!

1.Six pears and three apples cost \$3.90. Two pears and five apples cost \$3.30. How much does one pear cost?
3. ### science

Juan starts a campfire using wood and then sets a pot of water over the fire. Describe the major energy changes that take place in the wood, the pot, and the water. This is a good thinking exercise. I will be happy to critique your …
4. ### Science

In an H-R Diagram, the path showing changes in a star's luminosity and surface temperature as a function of time is called its?
5. ### math

Solve. 15x – 2(6x – 0.865) = 2x + 0.365 We will be happy to critique your work or thinking.
6. ### maths

evaluate; square root of 0.25 x 10 neg.6 I will be happy to critique your thinking. Is this a test question?
7. ### College Algebra

Simplify the expression: (6ax4)^2(2x)^-2 I will be happy to critique your work or thinking on this. I will be happy to critique your work or thinking on this. Note that this is like a fraction with (2x)^2 in the denominator and (6ax^4)^2 …
8. ### Physics -- Electromagnetic

A 7.4 Ù ­ square loop, whose dimensions are 4:5 m x 4:5 m, is placed in a uniform 0.093 T magnetic field that is directed perpendicular to the plane of the loop The loop, which is hinged at each vertex, until the separation between …
9. ### physics

Hi, can you help me with this one? A family ice show is held in an enclosed arena. The skaters perform to music playing at a level of 75.0 dB. This intensity level is too loud for your baby, who yells at 65.5 dB. (a) What total sound
10. ### eth125

How does staying on a Indian Reservation limit choices?

More Similar Questions