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3 years ago

2 fifthsin to decimal and percents

Mathematics

1 answer:

Otrada [13]3 years ago

5 0

Answer:

0.4 and 40%

Step-by-step explanation:

2 fifths to decimal and percent-

decimal- 2/5=4/10=.4

percent- .4= 40%

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HELP PLZ!!!! How did you do 2a-5b? And what are the answers

Xelga [282]

both of the questions?

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3 years ago

What is the distance between the following points?

Anastasy [175]

Answer:

distance = 5

Step-by-step explanation:

Use Pythagorean Theorem or Distance Formula (which comes from Pythagorean Thm anyway) see image.

6 0

2 years ago

If cot 0=12/5 find tan 0

jek_recluse [69]

cot 0=12/5 find tan 0

cot = adjacent/opp

tan = opp/adjacent

cot = 12/5

tan = 5/12

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3 years ago

Find the values of λ for which the determinant is zero.

elena55 [62]

Answer:

Determinant are special number that can only be defined for square matrices.

Step-by-step explanation:

Determinant are particularly important for analysis. The inverse of a matrix exist, if the determinant is not equal to zero.

How to find determinant

For a 2×2 matrix

$det ( \left[\begin{array}{cc}x&y\\a&z\end{array}\right] ) = xz-ay$

For a 3×3 matrix

we first decompose it to 2×2

$det (\left[\begin{array}{ccc}k&l&m\\o&p&q\\r&s&t\end{array}\right] )\\\\= k*det(\left[\begin{array}{cc}p&q\\s&t\end{array}\right] ) - l*det(\left[\begin{array}{cc}o&q\\r&t\end{array}\right] ) + m*det(\left[\begin{array}{cc}o&p\\r&s\end{array}\right] ) \\\\=k(pt-sq) - l(ot-rq) + m(os-rp)$

Example

Find the values of λ for which the determinant is zero

$\left[\begin{array}{ccc}s&-1&0\\-1&s&-1\\0&-1&1\end{array}\right]$

$det(\left[\begin{array}{ccc}s&-1&0\\-1&s&-1\\0&-1&1\end{array}\right])\\\\= s*det(\left[\begin{array}{cc}s&-1\\-1&1\end{array}\right] ) - (-1)*det(\left[\begin{array}{cc}-1&-1\\0&1\end{array}\right] ) + 0*det(\left[\begin{array}{cc}-1&s\\0&-1\end{array}\right] )\\\\= s(s(1)-(-1*-1)) - (-1)(-1*1 - (-1*0)) + 0\\= s(s - 1)) + 1(-1 + 0) \\=s^{2} -s-1$

Equating the determinant to zero

$s^{2} -s-1 =0\\$

s = $\frac{1}{2}$ * (1 ±5 )

s = 1.61 or -0.61

5 0

3 years ago

Helpp plssssss help meeeee

Neko [114]

Answer:

Monthly fare of employer = $ 10

Fare for swiping = $ 0.15

No. of times swiped = 40

Total cost spent = $10 + $ 0.15

= $ 10.15

Total cost of swipe = $ 0.15 × 40

= $ 0.60

4 0

3 years ago

2 fifthsin to decimal and percents​

2 fifthsin to decimal and percents