Xy is the number
A) x + y = 7
B) 10y + x = 10x + y + 9
collecting terms of equation B
B) -9x + 9y = 9
multiplying A) by 9
A) 9x + 9y = 63 then adding it to equation B)
B) -9x + 9y = 9
18y = 72
y = 4
x = 3
The number is 34
Answer:
1/4
Step-by-step explanation:
dy/dx(1/4x + 14)=1/4
Answer:
D=6
Step-by-step explanation:
'D' being 'Maximum amount of days in which Sandra can rent the car' must be equal to 6, as 10*6=60, which is the remainder of Sandra's budget after the 30 dollar fixed fee she must pay.
