exam Maths Puzzle Numerical Ability

30) If f(x)=4x-3 find the following f(-1)

I am not sure how to solve this problem can someone please help me out.

thanks

Read Solution (Total 0)

exam Other Question

Arnold had $1.70 in dimes and quarters. HE had 3 more dimes than quarter. How many of each coin did he have? I was not sure what type of problem this would be so I put what i thought was close.

Which of the following relations represents a function?
a. (0,4) (0,-3) (1,-2)
b. (1,1) (1,2) (1,3)
c. (2,-1) (2,1) (2,3)
d. (-1,2) (1,2) (3,2)