Esther had 66 pennies and then lost 10. Now she wants to buy a treat that coat 4 sevenths of the pennies she has left. How many pennies does the treat cost

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

answer:

f(5/2) = 10/3

i hope this you!

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225