Question

Please someone answer this :D I really need the answer

Answer 1

Answer:

8.25

Step-by-step explanation:

first substitution

x=4 and y=7

square root(i dont have it) 4(x)7 + 9(x)4 =

square root 28+36 =

square root 64 =

8.246211251

round to 3 significant figure = 8.25