Answer:
f(30)= 75
Step-by-step explanation:
3(30)-15
90-15
75
Answer:
4
Step-by-step explanation:
-3+4+2+1=4
Answer:
28
Step-by-step explanation:
So this means to replace the r you see in 4r^2-8 with 3.
Let's do that:
4(3)^2-8
Now to simplify this just use pemdas or a calculator:
4(9)-8 since 3^2 means 3*3=9
36-8
28
Answer: 126
Step-by-step explanation:
