The correct answer is ( A )
let me know if you need explanation.
So k=katie's' age
m=mara's age
k is 2 times as old as m
k=2m
sum is 24
add means sum
k+m=24
so we have
k+m=24 and
k=2m
subsitute
2m+m=24
add
3m=24
divide both sides by 3
m=8
subsitute again
k=2m
k=2(8)
k=16
katie=16
mara=8
S= 70w + 750
s(19) = 70w x 19+350= 1680
so its 1680
Answer:
253.90
Step-by-step explanation:
