3 years ago

How do you solve the problem 3/4 of 28

Mathematics

2 answers:

posledela3 years ago

4 0

The answer is 3/4 of 28 is 21

defon3 years ago

3 0

Answer: 21

Step-by-step explanation: .75 x 28

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Georgia [21]

Are you good it’s 73.33

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3 years ago

If x varies directly with y and x=3.5 when y=14 find x when y=18

jekas [21]

$\bf \qquad \qquad \textit{direct proportional variation}
\\\\
\textit{\underline{x} varies directly with \underline{y}}\qquad \qquad x=ky\impliedby 
\begin{array}{llll}
k=constant\ of\\
\qquad variation
\end{array}\\\\
-------------------------------\\\\
\textit{we also know that }
\begin{cases}
x=3.5\\
y=14
\end{cases}\implies 3.5=k14\implies \cfrac{3.5}{14}=k
\\\\\\
\cfrac{1}{4}=k\qquad therefore\qquad \boxed{x=\cfrac{1}{4}y}
\\\\\\
\textit{when y = 18, what is \underline{x}?}\qquad x=\cfrac{1}{4}(18)$