3 years ago

Please help and look at pic

Mathematics

1 answer:

Sati [7]3 years ago

3 0

Answer:

-49

Step-by-step explanation:

First you convert them in improper fraction then it comes

35/3 × -21/5

With the help of cross multiplication we get

7×-7

And then 7×-7 = -49

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În triunghiul ascuțitunghic ABCABC, punctul HH este ortocentrul său. Dacă măsura unghiului \angle BHC∠BHC este 130^{\circ}130 ∘

Ahat [919]

I need the points,I apologize.I also don’t understand this language lol.

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3 years ago

The matrix C=[1,-2_-3,7] was used to encode a phrase to [7,-28,-25,-35,-2_-21,107,90,123,17]. Find C^-1 and use it to decode the

posledela

$C= \left[\begin{array}{cc}1&-2\\-3&7\end{array}\right] \\ C^{-1}= \left[\begin{array}{cc}7&2\\3&1\end{array}\right] \\ \left[\begin{array}{cc}7&2\\3&1\end{array}\right] \times \left[\begin{array}{ccccc}7&-28&-25&-35&-2\\-21&107&90&123&17\end{array}\right] \\ =\left[\begin{array}{ccccc}49-42&-196+214&-175+180&-245+246&-14+34\\21-21&-84+107&-75+90&-105+123&-6+17\end{array}\right] \\ =\left[\begin{array}{ccccc}7&18&5&1&20\\0&23&15&18&11\end{array}\right]$
is the required matrix.

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3 years ago

How many numbers can you make with 01349

Alchen [17]

Answer:

The answer is five

Step-by-step explanation:

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2 years ago

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-3 – 5x - 5y + 8x + 7y + 8

Scilla [17]

Answer: -14y

Step-by-step explanation:

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3 years ago

How many 4' x 8' sheets of plywood are required to cover a floor that is 9 m by 16 m?

Xelga [282]

Assuming no border or waste, 9m by 16 m translates to 29.52' x 52.49'.
use 32/8=4 sheets of plywood to cover the width on the 8' side.
For the length, use 52/4=13 pieces on the 4' side.
This gives a total of 4*13=52 sheets.
The extra 0.49' x 29.52 can be covered using the extra from the last four sheets for the width.

Check:
Area to be covered: 29.52*52.49=1550 sq. ft.
Area of plywood supplied = 52*4'x8'= 1664 sq. ft, > 1550 sq.ft.

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3 years ago