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Swageraid32Best ResponseYou've already chosen the best response.1
those are my last two please........... ;/
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.0
# 4 D = b^2  4ac D = (1)^2  4(0.05)(1) D = ???
 one year ago

shyLove98Best ResponseYou've already chosen the best response.0
I'm sorry. I don't know any of this. I tried. I'm really really really sorry. :(((
 one year ago

phiBest ResponseYou've already chosen the best response.1
if you have a the equation of a parabola in standard form: y= ax^2 + bx +c you match up the coefficients of your equation with a, b, and c then use those numbers for a, b, and c in the formula discriminant= b^2 4ac jim_t already did most of the work for you.
 one year ago

phiBest ResponseYou've already chosen the best response.1
y= 0.05 x^2 + 1x + 1 is your equation
 one year ago

evergirlBest ResponseYou've already chosen the best response.0
I think phi has got you covered
 one year ago

Swageraid32Best ResponseYou've already chosen the best response.1
you mean that is how i do the quadratic part??
 one year ago

phiBest ResponseYou've already chosen the best response.1
we are doing question 4. They want to know the discriminant (of your quadratic equation) I assume they mean the equation they give in question 1 To find the discriminant we first do step 1: first step: pattern match y= 0.05 x^2 + 1x + 1 y= a x^2 +b x + c what is a,b, and c?
 one year ago

Swageraid32Best ResponseYou've already chosen the best response.1
i have that part i need number 5
 one year ago

phiBest ResponseYou've already chosen the best response.1
what did you get for a, b and c
 one year ago

Swageraid32Best ResponseYou've already chosen the best response.1
wait what?? like for the explanation part??
 one year ago

Swageraid32Best ResponseYou've already chosen the best response.1
D = (1)^2  4(0.05)(1)
 one year ago

phiBest ResponseYou've already chosen the best response.1
I see you copied Jim's answer To find the discriminant we first do step 1: first step: pattern match y= 0.05 x^2 + 1x + 1 y= a x^2 +b x + c what is a,b, and c?
 one year ago

phiBest ResponseYou've already chosen the best response.1
almost, b is just 1 (we only want the numbers. a= 0.05, b=1 , c=1 step 2: replace the letters a, b, and c in b^2  4ab with the numbers you just found (remember b^2 is short for b*b 4ab is short for 4*a*b * means multiply
 one year ago

phiBest ResponseYou've already chosen the best response.1
now what is 1^2 ? 1*1 = 1 4*0.05 is 0.2 0.2*1 is 0.2 so 1 .2 = 0.8 the discriminant is 0.8
 one year ago

Swageraid32Best ResponseYou've already chosen the best response.1
ok i get that thanks for actually working with me and not giving just the answer :D
 one year ago

Swageraid32Best ResponseYou've already chosen the best response.1
so could you assist me in #5 as well??
 one year ago

phiBest ResponseYou've already chosen the best response.1
For 5, the quadratic formula is \[ x=\frac{−b±\sqrt{b^2−4ac}}{2a}\] notice that the stuff inside the square root is the "discriminant", which you already figured out is 0.8 you also know what a, b and c are. So replace the letters with numbers what do you get?
 one year ago

Swageraid32Best ResponseYou've already chosen the best response.1
a=0.05, b=1, c=1 \[x=\frac{−1±\sqrt{1^2 4\times0.05\times1}}{2\times0.05}\]
 one year ago

Swageraid32Best ResponseYou've already chosen the best response.1
@phi ?? like that??
 one year ago

phiBest ResponseYou've already chosen the best response.1
I just noticed that the equation you have from question 1 should be y= 0.05x^2 x +1 notice that b is 1 (not +1) this changes your answers (gack!)
 one year ago

Swageraid32Best ResponseYou've already chosen the best response.1
yea i know it is a typo the graph is wrong
 one year ago

phiBest ResponseYou've already chosen the best response.1
if we use b= 1 we get \[x= \frac{1 ± \sqrt{0.8}}{0.1}= 10±\sqrt{80} = 10± 4\sqrt{5} \] you get two answers x= 10+4sqrt(5) and x= 104sqrt(5) these are where the graph crosses the xaxis
 one year ago

Swageraid32Best ResponseYou've already chosen the best response.1
wait i am confused
 one year ago

Swageraid32Best ResponseYou've already chosen the best response.1
the part like so i need to switch it to a 1?
 one year ago

phiBest ResponseYou've already chosen the best response.1
It's your call. The question says find the equation, from the graph. Did you find the equation from the graph? If so, you got it wrong?
 one year ago

Swageraid32Best ResponseYou've already chosen the best response.1
o wow no i used the graph that was provided on the graph ;( that means i have to go back and do this all again :/
 one year ago

phiBest ResponseYou've already chosen the best response.1
Q1 general equation is y=0.05 x^2 x +1 vertex form is 0.05(x10)^2  4
 one year ago

Swageraid32Best ResponseYou've already chosen the best response.1
so that means its this? y= 0.05 x^2 1x + 1
 one year ago

phiBest ResponseYou've already chosen the best response.1
in Q2, the 10 become +10 so that means its this? y= 0.05 x^2 1x + 1 Yes
 one year ago

phiBest ResponseYou've already chosen the best response.1
in Q2, the domain are all valid x's in this case, inf to +infinity
 one year ago

phiBest ResponseYou've already chosen the best response.1
in Q2, the range is all y values. from the graph, you see y is always bigger than 4
 one year ago

phiBest ResponseYou've already chosen the best response.1
in Q3, your xintercepts should be positive
 one year ago

phiBest ResponseYou've already chosen the best response.1
in Q4, b is 1 not +1, but it won't change the discriminant calculation.
 one year ago

Swageraid32Best ResponseYou've already chosen the best response.1
ok thanks for all that :D
 one year ago

Swageraid32Best ResponseYou've already chosen the best response.1
i do need your help again though i mean how are you supposed to find the domain and range? @phi
 one year ago
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