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3 years ago

Which expression can be used to convert 80 US dollars (USD) to Australian dollars (AUD)?

Mathematics

2 answers:

elena-s [515]3 years ago

7 0

Answer:

D) 80 USD x (1.0343 AUD / 1 USD)

Step-by-step explanation:

The conversion rate that we need goes from 1 USD to the number of AUD. This means we need the first conversion rate, 1 USD = 1.0343 AUD.

Since we have 80 USD, we are going to multiply 80 by our conversion rate, 1.0343; this eliminates choices A and C.

We want to have our units as AUD when we're finished. This means that when we multiply, AUD must be on the top of the rate we're multiplying by; this means D is our answer.

rodikova [14]3 years ago

3 0

The answer is D. The first thing to do is to check units. The unit for the answer should be AUD since we are converting USD to AUD, so only C and D work. 1 USD is equal to 1.0343 AUD, instead of the other way around (1USD=0.9668AUD), which means 80 USD should be multiplied by 1.0343 AUD/1USD, because AUD is cheaper and there should be more AUDthan USD after conversion.

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3 years ago

A local hamburger shop sold a combined total of 659 hamburgers and cheeseburgers on Sunday. There were 50 fewer cheeseburgers so

NISA [10]

Answer:

The sold 354.5 hamburgers and 300.5 cheeseburgers.

Step-by-step explanation:

Let number of hamburgers=h

Let number of cheeseburgers=c

On Sunday, the shop sold a combined total of 659 hamburgers and cheeseburgers. Therefore:

h+c=659....(I)

There were 50 fewer cheeseburgers sold than hamburgers .

c=h-50.....(ii)

Substitution of equation (ii) into (I)

h+(h-50)=659

2h=659+50

2h=709

h=709/2=354.5

From (ii)

c=h-50

=354.5-50=300.5

The sold 354.5 hamburgers and 300.5 cheeseburgers.

NOTE: These result are from the given data. However, we were not informed if the shop sells half burgers or not

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3 years ago