Answer:
Step-by-step explanation:
hi
Q1 answer below
Eric has to spend $115 and he has spent $90. We need to know how much money he can spend, therefore:
Let x = the money he can now spend
90 + x ≤ 115
x ≤ 115 -90
x ≤ 25.
log₃(243) = x
3^x = 243
Rule: a^x = b -> logₐ(b) = x
f(x)=2 cos(x)-1
that is the answer