Answer:
Step-by-step explanation:
hello :
5(x + 7)² = 245
(x + 7)² = 49
x=0 is solution but you have other solution -14 because :(-14+7)² = (-7)² =49
here is an solution Step-by-step :
(x + 7)² = 49 means : (x + 7)² = 7²
(x + 7)² - 7²=0 use identity : a²-b² = (a-b)(a+b)
a=x+7 and b= 7
(x+7-7)(x+7+7) = 0
x(x+14)=0
x=0 or x+14=0
so : x=0 or x= -14
Answer:
-6
Step-by-step explanation:
is it
Answer:
24.5m
Step-by-step explanation:
given h is proportional to v² or
h ∝ v²
we can write this in terms of constant k
h = kv²
given h = 8 when v = 20
h = kv²
8 = k 20²
8 = 400k
k = 8/400 = 0.02
hence our equation becomes
h = 0.02v²
when v = 35
h = 0.02 (35²)
h = 24.5 meters
17. y = .5x + 2
Coordinates:
(0, 2)
(1,2.5)
(2,3)
(3,3.5)
(4,4)
(5,4.5)
18. y = x + 1
Coordinates:
(0,1)
(1,2)
(2,3)
(3,4)
(4,5)
(5,6)
This one should just be a straight diagonal line, so it'll be easy to graph.
You have to do the plotting, I don't have a tool for that.
Y=4 is going to be the answer.
