7x-3 = 18
+3 for both sides
7x = 21
devide 7 for both sides
x = 3
Answer:
x=6, x=0
Step-by-step explanation:
+
= 25
+
= 25
x=6, x=0
Write the vertex form of the equation and find the necessary coefficient to make it work.
.. y = a*(x +3)^2 -2
.. = ax^2 +6ax +9a -2
You require the y-intercept to be 7. So, for x=0, you have
.. 9a -2 = 7
.. 9a = 9
.. a = 1
The equation you seek is
.. y = x^2 +6x +7
Answer:
56
Step-by-step explanation:
6+7b-3a
Substitute:
6+7(8)-3(2)
Solve:
6+56-6
Simplify:
6+50
=56