Wednesday

August 20, 2014

August 20, 2014

Posted by **kris** on Monday, August 28, 2006 at 1:43pm.

how do I do this?

When x=3, one wants y to be 10

y= (x+a)^3 + 2

20= (3+a)^3 + 2

solve for a. I would change it to

18=(3+a)^3 and take the cube root of each side to solve for a.

I think we need to make it

10=(x+a)^3 + 2 or

8=(x+a)^3 so 8^(1/3)=x+a, then solve this when x=3

Then substitute that into y=(x+a)^3 + 2.

thanks for your help but I am still confused of how to find a right like i got up to here:8=(3+a)^3

then I have to cube it but how? like what would i end up with? I am a little confused!

Ok, here's what we know.

y=x^3 + 2

We first determine the value of x that corresponds to y=10, thus

10=x^3 + 2, which means 8=x^3 and x=2

We know that we want the value x=2 to now be shifted to the right to correspond to x=3. This means we need to subtact 1 from x in shifting to the right (it seems a little counter-intuitive, but study it a bit.)

Thus y=(x-1)^3+2 is the desired shift.

Substitute x=3 and we have y=(3-1)^3+2=2^3 + 2=10.

What would be the shift if we wanted the same graph to coincide with (3,2)?

How about (-4,10)?

Take the cube root of each side...

2= a+3 solve for a. My solution above is wrong, a typo.

repost if you have questions.

**Related Questions**

check+ math! - QUESTION: A horizontal translation is applied to the graph of y= ...

Plz Help!Algebra!!! - Choose the description of the graph of the equation x = -8...

precalculus - How do I find the vertical/horizontal compression/stretch? For the...

math - HELP Not great in these Express y=2x^2 -12x +23 in the form y=2(x-c)^2 + ...

Math help Please - 2. How do the graphs of y = 1/x and y = 3/x – 4 compare? (1 ...

Algebra 2 - 2. How do the graphs of y = 1/x and y = 3/x – 4 compare? (1 point) ...

Algebra-Please help-I'm confused - This deals with quadratic functions-If I have...

Algebra - This deals with quadratic functions-If I have a graph with he = (-5)...

Physics - A 2.9 kg body is at rest on a frictionless horizontal air track when a...

Maths - A cubic graph has the equation: y = 3(x-1)(x+2)(x+5) Write in similar ...