# Posts by Rei

Total # Posts: 27

**Math**

Ohhh! Thank you so much!

**Math**

Hi! I was wondering after you simplify a radical, can you add the rest of the equation to whats outside of the radical? ex. 20 + 10?35 Would that be 30?35 or would it stay as 20+10?35 Thank you in advance, this is really bugging me! :)

**Math (Algebra)**

*facepalm* That tricked me. I think it's (152, 7316) & (0,20)? I guess ANY number times 0 is a factor of 0... So I did -152 x 0=0 and -152+0 = -152. That gave me (x-152)(x+0)

**Math (Algebra)**

Ok.. I understand how to eliminate y and everything, then you factor it as normal. The solutions to that equation were (-1, 1) and (2,4). I'm working on another one and used the same steps. y=48x+20 -(y=-x^2+200x+20) and i ended up with : 0=x^2-152x This can't be ...

**Math (Algebra)**

Sorry :) I must've gotten something confused. I think I get it now. Thank you!

**Math (Algebra)**

I understand how to do that, thats substitution. How can I solve it with elimination?

**Math (Algebra)**

I have to solve a few systems through elimination, but I'm still not quite sure how to do it.. The first is y=x^2 and y=x+2 Can someone show me how exactly it is worked out so I can try the second one myself?

**Math**

What is 0.7 x 10 = x 10 = 0.07 x 10 = x 10 = 0.23 x 10 = 0.023 x 10 = 0.004 x 10 = 0.404 x 10 =

**Chemistry**

What mass of Na2S is produced when 20g of sodium reacts with excess sulfur?

**average rate of change**

Please help.. Determine the value of "g" so that the average rate of change of the function h(x)=x^2+3x+2 on the interval -3≤x≤g is -1. Thank you.

**instantaneous rate of change problem**

Joe is investigating the rate of change of the function y=cos x on the interval xE[0,2π]. He notices that the graph of y=cos x passes through the x-axis at 45°. He also determines the instantaneous rate of change at x = 0, π, and 2π by inspection. Based on ...

**combining functions**

Given: f(x)=2x^2-x+1 g(x)=2 sin x h(x)=3^x Determine: a) f(g(x)) b) (h^-1 o f)(x) c) g(f(h(x)))) Please show steps, thank you very much.

**product of function**

Given: f(x)=2 cos x and g(x)=sin x. Which of these expressions is equivalent to (fxg)(π/16)? a) cos π/8 b) sin π/8 c) cos π/4 d) sin π/4 Please explain the answer, thank you.

**physics**

A man stands on the roof of a 10.0 -tall building and throws a rock with a velocity of magnitude 30.0 at an angle of 34.0 above the horizontal. You can ignore air resistance. Calculate the horizontal distance from the base of the building to the point where the rock strikes ...

**physics**

A man stands on the roof of a 10.0 -tall building and throws a rock with a velocity of magnitude 30.0 at an angle of 34.0 above the horizontal. You can ignore air resistance. Calculate the horizontal distance from the base of the building to the point where the rock strikes ...

**physics - Energy**

I got it wrong. I did exactly what you said. Multiplied m times g times h then multiplied by 2. Sq root that number and got 2778.926411 but it was wrong.

**physics - Energy**

Thank you!

**physics - Energy**

An ore car of mass 41000 kg starts from rest and rolls downhill on tracks from a mine. At the end of the tracks, 9.6 m lower vertically, is a horizontally situated spring with constant 4.7 × 10^ 5 N/m. The acceleration of gravity is 9.8 m/s^ 2. Ignore friction. How much ...

**physics - Energy**

Just giving the equation to solve the problem would be nice too!

**physics - Energy**

A 0.280 kg block on a vertical spring with a spring constant of 4.12 × 10^ 3 N/m is pushed downward, compressing the spring 0.0600 m. When released, the block leaves the spring and travels upward vertically. The acceleration of gravity is 9.81 m/s^ 2. How high does it ...

**History (writing)**

My college instructor is asking me to define and discuss one of the themes the entire class read about for homework. I've chosen to do a paper on Americanization of the Mexican American woman. However I don't understand how I should define and discuss the theme while ...

**algebra**

8>7n+1 8-1>7n+1-1 7>7n 1>n * You do not change the sign because you did not divide by a negative. You only change the sign when you do divide by a negative number.

**government**

yes please

**government**

Do you believe that the media is America's "fourth branch" of government? Is there adequate fair and balanced reporting on political issues or is the media biased? Why or why not

**history**

Prior to the "democratizing" of politics during the age of Jackson, presidential candidates were usually chosen by a

**history**

6. Do you find it curious that Budinot, an educated and highly assimilated Cherokee, would argue for removal in the name of preserving the Cherokee people? What does he fear if the Cherokee remain? What does this say about his attitude towards his own people? To what extent ...

**history**

Why does James Fraser claim that there was great diversity in the progressive education movements? Summarize, and compare and contrast, the platforms of four different progressive educational reform groups. Which group do you believe had the best ideas?

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