Answer:
the right answer is 18 and under for part a for part b the answer is 45 -64
Let x be cost notebook and y be cost of index card
According to first condition
3x+4y=32
According to second comdition
5x+5y=32+15
Solve the two equations
Answer: 9.22
Step-by-step explanation:
2^2 + 9^2 = C^2
4+81=C^2
85=C^2
(square root both sides)
C=9.219544
C=9.22
10x + 6 by simple developping
Answer:
none of the above im pretty sure
Step-by-step explanation: