3d - e = 7
d + e = 5

use the linear combination method to solve

a. there are infinitely many solutions
b. there is no solution
c. the solution is (2,-1)
d. the solution is (3,2)

given that    bisects ∠dbc, which statement must be true? the answer is:   m∠abd = m∠abc 

Volume is length times width times height so
20 times 8 times 30 which is 4,800
surface area is ph (p is perimeter of base), h is height.
so perimeter would be length+length+width+width so 20+20+8+8 which is 56. so multiply 56 times 30 which is 1680. hope this !