If f(x)=2x²-1, then f(-3)

Step-by-step explanation:

To find replace x for -3

17

Step-by-step explanation:

So you would replace x with -3

2(-3)^2-1

first you would do the exponet

2(9)-1

then you would distribute the 2

18-1

then subtract

17

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour