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rewona [7]
3 years ago
11

Nearest hole number to 2.81

Mathematics
1 answer:
levacccp [35]3 years ago
4 0

Nearest whole number would be 3


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faust18 [17]

Answer:

Its 49

Step-by-step explanation:

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3 years ago
Solve the system by using a matrix equation (Picture provided)
Katyanochek1 [597]

Answer:

Option b is correct (8,13).

Step-by-step explanation:

7x - 4y = 4

10x - 6y =2

it can be represented in matrix form as\left[\begin{array}{cc}7&-4\\10&-6\end{array}\right] \left[\begin{array}{c}x\\y\end{array}\right] = \left[\begin{array}{c}4\\2\end{array}\right]

A= \left[\begin{array}{cc}7&-4\\10&-6\end{array}\right]

X= \left[\begin{array}{c}x\\y\end{array}\right]

B= \left[\begin{array}{c}4\\2\end{array}\right]

i.e, AX=B

or X= A⁻¹ B

A⁻¹ = 1/|A| * Adj A

determinant of A = |A|= (7*-6) - (-4*10)

                                    = (-42)-(-40)

                                    = (-42) + 40 = -2

so, |A| = -2

Adj A=  \left[\begin{array}{cc}-6&4\\-10&7\end{array}\right]

A⁻¹ =  \left[\begin{array}{cc}-6&4\\-10&7\end{array}\right]/ -2

A⁻¹ =  \left[\begin{array}{cc}3&-2\\5&-7/2\end{array}\right]

X= A⁻¹ B

X=  \left[\begin{array}{cc}3&-2\\5&-7/2\end{array}\right] *\left[\begin{array}{c}4\\2\end{array}\right]

X= \left[\begin{array}{c}(3*4) + (-2*2)\\(5*4) + (-7/2*2)\end{array}\right]

X= \left[\begin{array}{c}12-4\\20-7\end{array}\right]

X= \left[\begin{array}{c}8\\13\end{array}\right]

x= 8, y= 13

solution set= (8,13).

Option b is correct.

3 0
3 years ago
What is the sum of three fours and four threes
Oduvanchick [21]
The.   Answer  is. 145.  Because.  If you multiply 3 x3x3x3 which equals 81. And  add 4x4x4 which equals 64. Will give you the sum of 145.
7 0
3 years ago
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Please help me with this homework show me how you get it and the answer
omeli [17]
Radius = 4 feet
Height = 3 feet

Formula :
Volume =
πr2h
———
3


Solution :

3.14 x 42 x 3
——————— =
3

3.14 x 16 x 3
——————— =
3


150.7964
—————-
3

Volume = 50.2655 feet³
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3 years ago
Help pls<br> I need help with this lol
Nezavi [6.7K]

Answer:

B. 70

Step-by-step explanation:

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3 years ago
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