Answer:
x^4+3x^3-9x^2-12x+20
Step-by-step explanation:
Use the distributive property to multiply x^2−4 by x^2+3x-5 and combine like terms.
The Answer to this problem is 190179
Answer:
The volcanic eruption occurred 8,634.90 years ago.
Step-by-step explanation:
Formula used:

where,
= initial mass of isotope = x
N = mass of the parent isotope left after the time, (t) = 35% of x=0.35x
= half life of the isotope = 5700 year
= rate constant

Now put all the given values in this formula, we get

The volcanic eruption occurred 8,634.90 years ago.
Answer:
4)x=2
5) (-3,4)
Step-by-step explanation:
4) f(x)=x^2-4x+4-4+5
f(x)=(x-2)^2+1
f(x)=a(x-h)^2+k
Axis of symmetry is x=h
h is 2, so axis of symmetry is x=2
5) f(x)=x^2+6x+9-9+13
f(x)=(x+3)^2+4
f(x)=a(x-h)^2+k
Vertex is (h,k)
So, vertex is (-3,4)
Sorry, I can't answer the first 3, cause I don't understand what a-value, b-value and c-value mean.
And also is this college math, cause I'm in middle-school, and I know how to do it.