Answer:
11/5
Step-by-step explanation:
FirLet a and b be the roots of 11x^2-4x-2=0
Now
Dividing the quadratic equation by 11 we have
Now the sum of the roots is the minus of the coefficient of x and the product of the roots is the constant. Therefore
and we have
(-1,+1) quadrant 2 means negative positive
PART A)
The rate of change is -40 songs each week, because the amount of songs left to be downloaded decrease by 40 every week.
<span>the initial value is 200 at 0
weeks, which means that there are 200 songs to be downloaded at the
beginning</span>
PART B)
<span><span><span>
<span><span>calculate the slope:
</span><span>
m = (y2- y1)/(x2 - x1) = (160 - 200)/(1 - 0)
m = -40
now use the line equation in form of point-slope
y - y1 = m(x - x1)
y - 200 = -40(x - 0)
y = -40x + 200</span></span>
</span></span></span>
<span>
<span>
</span></span>
This is so easy, the answer is -85
x -3 = -5
x = -5 + 3
x = -2
.
3x - 9
Substituting the value of x
3(-2) - 9 = -6 - 9 = -15
