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2 years ago

30% of 50 what’s the easiest and fastest way to solve it?

2 answers:

4 0

Step 1: Our output value is 50.

Step 2: We represent the unknown value with $x$.

Step 3: From step 1 above,$50=100\%$.

Step 4: Similarly, $x=30\%$.

Step 5: This results in a pair of simple equations:

$50=100\%(1)$.

$x=30\%(2)$.

Step 6: By dividing equation 1 by equation 2 and noting that both the RHS (right hand side) of both
equations have the same unit (%); we have

$\frac{50}{x}=\frac{100\%}{30\%}$

Step 7: Again, the reciprocal of both sides gives

$\frac{x}{50}=\frac{30}{100}$

$\Rightarrow x=15$

Therefore, $30\%$ of $50$ is $15$

Olegator [25]2 years ago

4 0

Answer:

Step-by-step explanation:

change the percent to a decimal

30% to .30

.30 x 50= 15

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N-2=10n+4 over 2 what is the value of n

Snowcat [4.5K]

Consider the given equation:

$n-2 = \frac{10n+4}{2}$

Cross multiplying in the given equation, we get

$(n-2) \times 2 = 10n+4$

Applying distributive property which states $a(b+c) = ab+ac$ , we get

$(n \times 2) - (2 \times 2) = 10n+4$

$2n -4 = 10n+4$

Adding '4' on both the sides, we get

$2n-4+4 = 10n+4+4$

$2n = 10n+8$

Subtracting '10n' from both the sides of the equation, we get

$2n-10n = 10n+8-10n$

$-8n = 8$

Dividing by '-8' in both the sides of the equation, we get

$n= -1$

Therefore, the value of 'n' is -1.

6 0

3 years ago

Find the measure of the missing angle.

ExtremeBDS [4]

Answer:

the answer is 138

Step-by-step explanation:

180-42=138 degrees

3 0

2 years ago

Orthogonally diagonalize the matrix, giving an orthogonal matrix P and a diagonal matrix D. To save time, the eigenvalues are

alexgriva [62]

Answer:

$P=\left(\begin{array}{ccc}-\frac{2}{3}&-\frac{2}{3}&\frac{1}{3}\\\frac{1}{\sqrt{5}}&0&\frac{2}{\sqrt{5}}\\-\frac{4}{3\sqrt{5}}&\frac{\sqrt{5}}{3}&\frac{2}{3\sqrt{5}}\end{array}\right)$

Step-by-step explanation:

It is a result that a matrix $A$ is orthogonally diagonalizable if and only if $A$ is a symmetric matrix. According with the data you provided the matrix should be