So Maurice would have 2N nickels
Total number of coins is N + 2N + 9 = 3N + 9
Each nickel is 5 pennies
3N of nickels = 15N pennies
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Their worth is 84 cents
15N + 9 = 84
15N = 75
N = 75/15 = 5
N = 5
This means Nina has 5 nickels.
Answer:
First box: y/x = 38/2 = 19
Second box: y/x = 57/3 = 19
Third box: y/x = 76/4 = 19
Constant of proportionality = 19
Equation: y = 19x
the other asnwers dont make any sense. but just take my word for it.
X=cost for 1 soft taco
x=cost for 1 doubledecker
dory is
11.25=3x+3y
nemo buys
10=4x+2y
we have
11.25=3x+3y and
10=4x+2y
divide second equation by 2
5=2x+y
multiply by -3
-15=-6x-3y
add to first equatin
-15=-6x-3y
11.25=3x+3y+
-3.75=-3x+0y
-3.75=-3x
divide both sides by -3
1.25=x
subsitute
5=2x+y
5=2(1.25)+y
5=2.5+y
minus 2.5
2.5=y
double dekesr cost $2.50
soft tacos cost $1.25