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olivernolasco23
11.07.2019 •
Mathematics
Determine which expressions represent real numbers and which expressions represent complex number.
asaaap! plis!
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Ответ:
do u have a pic?
step-by-step explanation:
Ответ:
Given:
Seven hot dogs and two hamburgers cost 14.50
Two hot dogs and seven hamburgers cost 17.00.
To find:
The cost of one hot dog and the cost of one hamburger.
Solution:
Let the cost of one hot dog be x and the cost of one hamburger be y.
According to the question,
Multiply (i) by 7.
Multiply (ii) by 2.
Subtract (iv) from (iii).
Divide both sides by 45.
Put x=1.5 in (i).
Divide both sides by 2.
Therefore, the cost of one hot dog is 1.5 and the cost of one hamburger is 2.