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Brian brought cookies to school one day for class. He brought two dozen. His class ate 1 1/2 dozen. How many where left? A: 6 cookies

Answer:

Bryan weighed two pieces of metal for an experiment. The piece of copper weighed [tex]2\frac{4}{5}[/tex] pounds and the piece of zinc weighed [tex]4\frac{3}{5}[/tex]pounds. Calculate the total metal in pounds he used.

Solution:- Weight of copper metal= [tex]2\frac{4}{5}[/tex] pounds

Weight of zinc metal=[tex]4\frac{3}{5}[/tex]pounds

The total weight of the metal he used=[tex]2\frac{4}{5}+4\frac{3}{5}[/tex] pounds

To solve the sum first convert them into like improper fractions

[tex]2\frac{4}{5}\rightarrow\frac{2\times5+4}{5}=\frac{14}{5}[/tex]

[tex]4\frac{3}{5}\rightarrow\frac{5\times4+3}{5}=\frac{23}{5}[/tex]

Now, The total weight of the metal he used=[tex]\frac{14}{5}+\frac{23}{5}=\frac{37}{5}[/tex] pounds

Ans:- Bryan used [tex]\frac{37}{5}[/tex] pounds of metal.

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