3 years ago

Researchers surveyed one hundred students on

Mathematics

2 answers:

lesya [120]3 years ago

7 0

Answer: 0.667

Step-by-step explanation:

Trust me

MA_775_DIABLO [31]3 years ago

4 0

Answer:

⅔

Step-by-step explanation:

Total females: 48

Female and invisibility: 32

P(invisibility/female) = 32/48

2/3

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Fiona bought some socks that cost $4.95 for each pair and some belts that cost $6.55 each. Fiona spent $27.95 in all. Let a repr

lilavasa [31]

Answer:

4.95 a plus 6.55 b equals 27.95

Step-by-step explanation:

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3 years ago

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Find a 2 × 2 matrix b ≠ o and b ≠ i2 such that ab = ba, where a = 1 7 0 1 . b =

riadik2000 [5.3K]

If $\mathbf A$ is invertible, then we can simply choose $\mathbf B=\mathbf A^{-1}$ because for any invertible matrix $\mathbf X$ by definition we must have $\mathbf{XX}^{-1}=\mathbf X^{-1}\mathbf X=\mathbf I$ .

We have $\det\mathbf A\neq0$ , as

$\det\mathbf A=\begin{vmatrix}1&7\\0&1\end{vmatrix}=1\times1-0\times7=1$

which means $\mathbf A$ is non-singular and has an inverse. The inverse itself would be

$\mathbf A^{-1}=\dfrac1{\det\mathbf A}\begin{bmatrix}1&0\\-7&1\end{bmatrix}^\top=\begin{bmatrix}1&-7\\0&1\end{bmatrix}$

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3 years ago

24 points!! What is the measure of angle B in the triangle?

mestny [16]

Sum of all the angles in a triangle is 180
so, 120 + x + x+16 = 180
136 + 2x = 180
2x = 180 - 136
x = 44/2
x = 22

Now, Angle B = x = 22

In short, Your Answer would be 22

Hope this helps!

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2 years ago

The scale on a map is 2cm = 25 miles. Dave measured the distance to the next town at 5 cm. How many miles away is the next town?

Brilliant_brown [7]

Answer:

62.5

Step-by-step explanation

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kirza4 [7]

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Step-by-step explanation:

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