Answer:
r=32/7
Step-by-step explanation:
To get the vertex of the parabola we proceed as follows;
y=-7(x-4)^2-5
The above can be written as:
y=-7x^2+56x-117
The values of a,b and c are:
a=-7, b=56 and c=-117
x=-b/(2a)
x=-56/(-7*2)=4
but;
y=-7x^2+56x-117
y=-7(4)^2+56(4)-117
y=-5
Thus;
x=4 and y=-5
The vertex will be at point (4,-5)
Answer:
a = 132; b = 12; c = 36
Step-by-step explanation:
a = b + 120
b = b
c = 3b
a + b + c = 180
(substitute these into the above equation)
b + 120 + b + 3b = 180
5b + 120 = 180
-120 -120
5b = 60
/5 /5
b = 12
(substitute b back into the first equations)
a = (12) + 120 = 132
b = (12)
c = 3(12) = 36
(check: 132 + 12 + 36 = 180)
Answer:
See below:
Step-by-step explanation:
Take the difference between y values of any two values and divide by difference in corresponding x values
for example, 1: 66-50/4-1=16
2. 36-30/8-6= 6/2=3
3. 63-56/8-7= 7/1 = 7
4. 100-78/9-7= 22/2 = 11
you can choose any two points, not just the two I used.
