2 years ago

To make five apple pies you need about 2 pounds of apples how many pounds of apples do you need to make 20 pies

Mathematics

1 answer:

aleksklad [387]2 years ago

5 0

Answer:

8 pounds

Step-by-step explanation:

use a proportion of 2/5 = x/20.

x will equal 8

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Man spends 1/5 of his salary on shoes and 2/3 on school fess what fraction of his salary is left

Zepler [3.9K]

Answer: 2/15

Explanation :

1 - (1/5 + 2/3)
1 - (3/15 + 10/15)
1 - 13/15
15/15 - 13/15
= 2/15

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2 years ago

Can someone help me find the value of x and the value of y? I need them to show their work, too.

solniwko [45]

$\bf \begin{cases} x-2y=0\\ 2x-5y=-4 \end{cases} \\\\[-0.35em] ~\dotfill\\\\ x-2y=0\implies x=2y \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{substituting the found \underline{x} in the 2nd equation}}{2(2y)-5y=-4}\implies 4y-5y=-4\implies -y=-4 \\\\\\ y=\cfrac{-4}{-1}\implies \blacktriangleright y=4 \blacktriangleleft \\\\[-0.35em] ~\dotfill$

$\stackrel{\textit{substituting the found \underline{y} in the 1st equation}}{x-2(4)=0}\implies x-8=0\implies \blacktriangleright x=8 \blacktriangleleft \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill (8,4)~\hfill$