Suppose that britain pegs the pound to gold at six pounds per ounce, whereas the exchange rate between pounds and u. s. dollars is $5 = £1. what would an ounce of gold be worth in u. s. dollars?

$30

Step-by-step explanation:

The question says that one ounce costs £6. Now we need to find out what £6 is in dollars. To do this we use the ratio based on the exchange rate:

£1 : $5

£6 : x

then we cross multiply

x = $30

So one ounce of gold costs £6 or $30

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".

square pyramid

step-by-step explanation:

square prism looks like nothing like that

triangular prism has a rectangular base instead of a square base

tetrahedron has a triangular base