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2 years ago

15

The measurement of a pressure valve starts at 36 psi and falls to 30 psi. What is the approximate percent decrease in the readin

g on the pressure valve.
a.17%
b.20%
c.80%
d.83%

1 answer:

lukranit [14]2 years ago

6 0

Answer:the answer is a 17psi

Step-by-step explanation:

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F you have $18 and a 15% markup, what is the retail price?

Serggg [28]

OK so first I like to find what 10% is which in this case would be 1.8 and to find the other 5% you divide 1.8 by 2 which gets you .9 if you and 1.8 and .9 you get 2.7 and if you add 2.7 to 18 you get 20.7 which is your retail price

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2 years ago

Sedaia [141]

$\bf \begin{array}{cccccclllll}
\textit{something}&&\textit{varies directly to}&&\textit{something else}\\ \quad \\
\textit{something}&=&{{ \textit{some value}}}&\cdot &\textit{something else}\\ \quad \\
y&=&{{ k}}&\cdot&x
&& y={{ k }}x
\end{array}\\ \quad \\
$

and also

$\bf \begin{array}{llllll}
\textit{something}&&\textit{varies inversely to}&\textit{something else}\\ \quad \\
\textit{something}&=&\cfrac{{{\textit{some value}}}}{}&\cfrac{}{\textit{something else}}\\ \quad \\
y&=&\cfrac{{{\textit{k}}}}{}&\cfrac{}{x}
&&y=\cfrac{{{ k}}}{x}
\end{array}
$

now, we know that V varies directly to T and inversely to P simultaneously
thus $\bf V=T\cdot \cfrac{k}{P}$

so $\bf V=T\cdot \cfrac{k}{P}\qquad 
\begin{cases}
V=42\\
T=84\\
P=8
\end{cases}\implies 42=\cfrac{84k}{8}\implies 4=k
\\\\\\
V=\cfrac{4T}{P}\qquad now\quad 
\begin{cases}
V=74\\
P=10
\end{cases}\implies 74=\cfrac{4T}{10}\implies 185=T$

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2 years ago

The stock of Company A lost 2% today to $46.55. What was the opening price of the stock in the beginning of the day?

cluponka [151]

Answer:

$2327.5

Step-by-step explanation:

The stock of company A lost 2% today .

Let the price of the stock at the beginning of the day be A.

Therefore, a 2% loss of A = $46.55

That’s

2% /100% x A = $46.55

0.02 x A = $46.55

Divide both sides by 0.02

0.02/0.02 x A = $46.55/0.02

A = $2327.5

The price of stock at the beginning of the opening day was $2327.5

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2 years ago

Allie is going to ship some gifts to family members, and she is considering two

Nostrana [21]

Answer:

a)10$

Step-by-step explanation:

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2 years ago

$1.99 for 17Ib =_? i dont under stand it tbh

elena55 [62]

Answer:

0.12

Step-by-step explanation:

1.99 ÷ 17= 0.117

then you round and it becomes 0.12

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2 years ago