Question

Seven cost $2.10 how much for 9

Answer 1

$2.70

Explanation:

Divide $2.10 by 7 to find unit cost and multiply this by 9, that is

cost of 9 =
`(2.10)/(7)` × 9 = $0.30 × 9 = $2.70

Answer 2

$ 2.7 will be cost of Nine

Explanation:

Given that:

Seven (pieces) cost: $2.10

From the cost of seven pieces ($210), we will first find the cost of one piece by dividing the cost ($210) by 7

So,

One (piece) cost= $(2.10/7)

One (piece) cost= $0.3

Now after obtaining the cost of one piece, The cost of nine pieces can be obtained by multiplying the cost of one piece with 9 as follows:

Nine (pieces) cost = $(9*0.3)

Nine (pieces) cost = $2.7

So the 9 pieces will cost $2.7

I hope it will help you!