What is the equation that i should ues in order to solve this problem? justin has $7.50 more that eva and emma has $12 less than justin. together, they have a total of $63.00 . how much money does each person have?

Justin has 27.50

Eva has $20

Emma has 15.50

Step-by-step explanation:

Let v = how much money Eva has

j = how much money justin has

Justin has $7.50 more that Eva

j = v+ 7.50

m= how much money Emma has

Emma has $12 less than Justin.

m = j-12

Together, they have a total of $63.00

Justin + Eva+ Emma = 63

j+v+m =63

Equations:

j = v+ 7.50  Solve this for v      j-7.5 = v

m = j-12        

j+v+m = 63

Substitute the first 2 equations in so this equation will be in terms of j

j + (j-7.5) + (j-12) = 63

Combine like terms

3j - 19.50 = 63

Add 19.50 to each side

3j-19.50+19.50 = 63+19.50

3j = 82.5

Divide by 3

3j/3 = 82.5/3

j =27.5

Justin has 27.50

Justin has $7.50 more that Eva

j = v+ 7.50

27.50 = v+7.50

Subtract 7.50 from each side

27.50-7.50 = v+7.5-7.5

20 =v

Eva has $20

Emma has $12 less than Justin.

m = j-12

m = 27.50 - 12

m = 15.50

Emma has 15.50

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2

answer: i don't understand it

step-by-step explanation: sorry