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3 years ago

How much salt is there in a 50 gallons of a 3% salt solution ?

1 answer:

3 0

$\bf \begin{array}{|c|ll}
\cline{1-1}
\textit{a\% of b}\\
\cline{1-1}
\\
\left( \cfrac{a}{100} \right)\cdot b
\\\\
\cline{1-1}
\end{array}~\hspace{5em}\stackrel{\textit{3\% of 50}}{\left( \cfrac{3}{100} \right)50}\implies 1.5~~gallons$

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Aleks04 [339]

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area=(11.7)*(15.4)
area=180.18cm^2

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3 years ago

Fred's frog jumped 7 times as far as Al's frog. The two frogs jumped a total of 56 inches. How far did Fred's frog jump?

sergey [27]

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3 years ago

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3 years ago

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Jaylon is standing 42 feet above sea level and his Christian is swimming at a depth of 17 feet below sea level

Rzqust [24]

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Step-by-step explanation

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3 years ago

What 2 numbers multiply to be -14 and add to be -3

Svetach [21]

Xy = -14
x + y = -3

$xy = -14$
$\frac{xy}{x} = \frac{-14}{x}$
$y = \frac{-14}{x}$

$x + y = -3$
$x + \frac{-14}{x} = -3$
$\frac{x^{2}}{x} + \frac{-14}{x} = -3$
$\frac{x^{2} - 14}{x} = -3$
$x^{2} - 14 = -3x$
$x^{2} + 3x - 14 = 0$
$x = \frac{-(3) \± \sqrt{(3)^{2} - 4(1)(-14)}}{2(1)}$
$x = \frac{-3 \± \sqrt{9 + 56}}{2}$
$x = \frac{-3 \± \sqrt{65}}{2}$
$x = \frac{-3 \± 8.06}{2}$
$x = -1.5 \± 4.03$
$x = -1.5 + 4.03$ $or$ $x = -1.5 - 4.03$
$x = 2.53$ $or$ $x = -5.53$

  x + y = -3
2.53 + y = -3
- 2.53 - 2.53
  y = -5.53
  (x, y) = (2.53, -5.53)

x + y = -3
  -5.53 + y = -3
+ 5.53   + 5.53
  y = 2.53
  (x, y) = (-5.53, 2.53)

The two numbers that multiply to -14 and add up to -3 are -5.53 and 2.53.

8 0

3 years ago