Answer:4000
Step-by-step explanation:40 times 100 is 4000
Well, since 3/15 can be simplified to 1/5 by dividing the top and the bottom by 3, you would just need to find the decimal of 1/5 which is much more commonly recognized. it's .2 (becasue 1/10 would be .1 and 1/5=2/10 so .1x2=.2)
Let's assume
number of child tickets sold on saturday is x
number of adult tickets sold on saturday is y
On saturday, twice as many adult tickets as child tickets were sold
so, we get

child admission is $6.30 and adult admission is $9.60
a total sales of $535.50
we get

now, we can plug y=2x

now, we can solve for x


now, we can find y


so,
number of child tickets sold on saturday is 21
number of adult tickets sold on saturday is 42.........Answer
To the hundredth is 2 numbers after the decimal so since the third number is a 1 and its less than 5 it does no damage to the 9 therefore you just take away the one and you have your rounded answer, 12.79
Y+6=7/1(x-6)
y=7/1x-48
hope that helps!