3 years ago

PLZ HELP ME

Mathematics

2 answers:

Sever21 [200]3 years ago

8 0

A. C = 5F - 32 over 9

rodikova [14]3 years ago

6 0

Answer:

C = 5 over 9(F − 32)

Step-by-step explanation:

We need to multiply both sides of the equation by the reciprocal, which is 5 over 9, not nine fifths.

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The price of an item has risen to $136 today. Yesterday it was $80. Find the percentage increase.

Natalka [10]

well, the numeric difference will be 136 - 80 = 56, now, if we take 80 (original price) to be the 100%, what is 56 (the increase) in percentage off of it?

$\begin{array}{ccll} amount&\%\\ \cline{1-2} 80&100\\ 56&x \end{array}\implies \cfrac{80}{56}=\cfrac{100}{x}\implies \cfrac{10}{7}=\cfrac{100}{x} \\\\\\ 10x=700\implies x = \cfrac{700}{10}\implies x = \stackrel{\%}{70}$