I think c. Hope this helps
I think each package would be $1.69. first you subtract 3.24 from 10 to get what you payed then divide that by 4 to get 1.69
A+30 = 60
a = 30
a + 2b = 60
30+2b = 60
2b = 30
b = 15
5b - 5c = 60
5(15) - 5c = 60
5c = 15
c = 3
10c + d = 60
10(3) + d = 60
30 + d = 60
d = 30
2d + 6e = 180 - 60
2(30) + 6e = 120
6e = 60
e = 10
4f + 4e = 120
4f + 4(10) = 120
4f = 80
f = 20
Answer:
The number of faces is 7.
The surface area is : 278 cm2
Step-by-step explanation:
below: 7x10=70cm2
up: 3x10=30cm2
behind: 5x10=50cm2
front: 2x10+5x10=70cm2
right: 2x7+3x3+4x3/2=29cm2
left: 29cm2
