A scale drawing of a mural uses the scale 2 centimeters (cm) 10 meters (m). Another scale drawing of the same mural uses the scale 2 cm 4 m in the first scale drawing, the mural is 7 cm long What is the length
of the mural in the second scale drawing?

150 + 225(3.5) + x = 2000
150 + 787.50 + x = 2000
937.50 + x = 2000
x = 2000 - 937.50
x = 1062.50 ...the food budget
1062.50 / 225 = 4.72 per student for food <==

j = r + 10
s = 2j 2(r + 10)2r + 20
s + r + j = 130

(2r + 20) + r + (r + 10) = 130
4r + 30 = 130
4r = 130 - 30
4r = 100
r = 100/4
r = 25 <=== Rosana

j = r + 10
j = 25 + 10
j = 35 <=== Juliet

s = 2r + 20
s = 2(25) + 20
s = 50 + 20
s = 70 <=== Santiago