Recent content by laura11

how?

can oxy acids make acid salts?

two forces with a magnitude 8N and 11N act on a large object. The angle between the forces is 30 degrees. Calculate the magnitude of the resultant force. the answer is 18.4 in the back of the book I drew a diagram and made a triangle... i was trying to use the triangle rule but like i...

shoot... k I am on the next one and its 3x^2+3x+5 soo i have =3(x^2+x)+5 =3(x^2+x+.25-.25)+5 but what do i do when its not a perfect square

aahhh ok thanks to everyone!

ok sooo I've got y=7x^2-28x+3 = 7(x^2-4x)+3 =7(x^2-4x+4-4)+3 =7[(x-2)^2-4)]+3 =7(x-2)^2-28+3 =7(x-2)^2-25 so i thought that was the whole answer... but the answer in the book says the answer is 7[(x-2)^2-25/7] what did i do wrong?

did kind of trial and error and i guess it equals (x-2)^2 but how do you actually figure that out?

im supposed to end up in the form y=a(x-h)^2+k though

y=7x^2-28x+3 so far I've got... y-7(x^2-4x)+3 then i divided 4/2=2 and then did 2^2 = 4 sooo y=7(x^2-4x+4-4)+3 and that's as far as i can get

thanks!

oook ill do it

no but i don't think that will help because the problem is figuring out what the function is

my problem is that i don't know how to find proper phase shift, period etc i understand what's happening and everything i came up with an equation but it just wasnt right

sin?

plllease help! A mass is supported by a spring so that it is at rest 0.5 m above a tabletop. The mass is pulled down 0.4 m and released at time t = 0, creating a periodic up and down motion that can be modeled using a trigonometric function. It takes 1.2 seconds to return to the lowest position...