Answer:
-5
Step-by-step explanation:
for x=-2
f(x)=2(-2)-1
f(x)=-5
b equals 0 I looked it up have a good day
Answer:
- n - 2
Step-by-step explanation:
distribute the parenthesis by - 1 and collect like terms
- (- n + 2 ) - 2n
= n - 2 - 2n
= n - 2n - 2 = - n - 2
as y varies directly with x, the following equation can be established.
y = a * x
from the condition given by the question, we can know that
7.5 = a * 3
a = 7.5 / 3 = 2.5
thus, we can infer that the equation is
y = 2.5 * x