-9 duh
It says the first week look at the numbers and then the top row with numbers. the only one that matches up is -9
I think 84
$108.00 divided by 72 is $1.50
So 1 bag is $1.50
$126.00 divided by $1.50 is 84
So 84 bags of chips
D=2n
.05n+.1d=3.5
I multiplied the nickels and dimes by these values because that is their actual monetary value
.05n=3.5-.1d
multiply everything by 20
n=70-2d
d/2=70-2d
.5d+2d=70
2.5d=70
d=28
n=14
so there are <u>28 dimes and 14 nickels
</u>checking this answer
28 dimes = $2.8
14 nickels = .70
2.8+.7=3.5
Use a calculator. The sine of 78 degrees is .98.