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3 years ago

Do any of y’all know please ? which ever answer shows their work are getting brainly

Mathematics

1 answer:

ahrayia [7]3 years ago

5 0

Answer:

Last one: ⅗

Step-by-step explanation:

cosF = adjacent/hypotenuse

cosF = FD/FE

= 6/10

= 3/5

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How to find matrics M

makkiz [27]

$\left[\begin{array}{ccc}9&7\\-4&2\end{array}\right] -4M=\left[\begin{array}{ccc}-3&3\\4&-18\end{array}\right]\qquad(*) \\\\M=\left[\begin{array}{ccc}a&b\\c&d\end{array}\right]\to4M=\left[\begin{array}{ccc}4a&4b\\4c&4d\end{array}\right]$

$(*)\qquad\left[\begin{array}{ccc}9&7\\-4&2\end{array}\right] -\left[\begin{array}{ccc}4a&4b\\4c&4d\end{array}\right]=\left[\begin{array}{ccc}-3&3\\4&-18\end{array}\right]\\\\\left[\begin{array}{ccc}9-4a&7-4b\\-4-4c&2-4d\end{array}\right]=\left[\begin{array}{ccc}-3&3\\4&-18\end{array}\right]\\.\qquad\qquad\qquad\qquad\ \ \ \Downarrow\\(_{11})\qquad9-4a=-3\ \ \ |-9\\-4a=-12\ \ \ \ |:(-4)\\a=3\\\\(_{12})\qquad7-4b=3\ \ \ \ |-7\\-4b=-4\ \ \ \ |:(-4)\\b=1$

$(_{21})\qquad-4-4c=4\ \ \ \ |+4\\-4c=8\ \ \ \ |:(-4)\\c=-2\\\\(_{22})\qquad2-4d=-18\ \ \ \ |-2\\-4d=-20\ \ \ \ \ |:(-4)\\d=5\\\\Answer:\ A.\ M=\left[\begin{array}{ccc}3&1\\-2&5\end{array}\right]$

3 0

3 years ago

87+25<br><img src="https://tex.z-dn.net/?f=12%20%2B%2010%20%20" id="TexFormula1" title="12 + 10 " alt="12 + 10 " align="absmid

Butoxors [25]

Answer:

Seriously?

U don't know the answer

3 0

3 years ago

What is the sum of (2x - 5y) and (x + y)?

seraphim [82]

Answer:

3x-4y

Step-by-step explanation:

combine like terms. 2x+x=3x.

-5y+y=-4y

6 0

3 years ago

Tammi deposited $520 into a bank account that earned simple interest each year. After 5 years, she had earned $156 in interest.

Sveta_85 [38]

Answer:

Step-by-step explanation:

Interest = Principal * rate * time

156 = 520(r)(5)

156 = 2600r

r = 0.06 or 6%

6 0

3 years ago

Read 2 more answers

Which is equal to 7(3.5x10^4)written in scientific nation

k0ka [10]

The answer is 2.45 x 10^5.

7 x 3.5 = 24.5

Move the decimal place over to the left until you have a number between 1 and 9 before the decimal point.

Add the number of times you moved the decimal point to the exponent (The 4 in the original equation).

2.45 x 10^5.

I hope this helps!

5 0

3 years ago