The sum of 2 numbers is 23. seven less than five times the smaller is equal to the largrr

small = 5  large=18

5+18=23

5x5-7=18

5s-7+s=23

6s-7=23

6s=30

s=5

problem:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

f(5/2) = 10/3

i hope this !

10/60

step-by-step explanation:

if you divide 10 by 60 the answer is 0.166666 while if you divide or solve the other problems it equals 0.6