The cost of different substances can expressed as equations where x is the number of grams purchased and y is the total cost for the purchase.

Question

Mach each equation first and second words and numbers.

How many grams of platinum could you buy with $5000?

How many grams of gold could you buy with $840?

How much would it cost to buy 20 grams of caviar?

How much would it cost to get 10 grams of saffron?

(Match these with the bottom, not the bottom)

___________________________________________________

Substance| cost per gram

Saffron || $11

Gold || $56

Caviar || $2

Platinum || $25

_____________________________________________________

(Match these with the top, not the middle)

125,000



15

200

40

47,040

110

10

1.1

Answer 1

1) How many grams of platinum could you buy with $5000?

To answer this, we have to divide the amount of money we have to spend by the cost of platinum per gram, which is 5000/25. Solving this expression gives us 200, so you could buy 200 grams of platinum with $5000

2) How many grams of gold could you buy with $840?

We take a similar approach here: divide the amount of money we have to spend by the cost of gold per gram, so our division expression will be 840/56. Solving this expression gives us 15, so you could buy 15 grams of gold with $840.

3) How much would it cost to buy 20 grams of caviar?

To find the solution for this problem, we have to multiply the price per gram of caviar by the number of grams that are being bought. In this case, that expression is (20)(2), which gives us a final answer of $40.

4) How much would it cost to get 10 grams of saffron?

This problem uses a similar approach to number 3; we have to multiply the price per gram of saffron by the number of grams that are being bought. That expression would be (10)(11), giving us a final answer of $110.