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3 years ago

19 plus ( 11 plus 37 ) ? And what property

Mathematics

1 answer:

jeyben [28]3 years ago

5 0

97 and it's the associative property of addition

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Which fraction is equivalent to ? 7/10 cup 7/9 cup 7/7 cup 7/1 cup

polet [3.4K]

14/20
14/18
1
7
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3 0

4 years ago

PLS HELP ASAP! solve the equation pls I need some help here. 18=-2+w

LekaFEV [45]

$-2+w=18\ \ \ |+2\\\\2-2+w=18+2\\\\\boxed{w=20}$

5 0

3 years ago

Which of the following matrices is the solution matrix for the given system of equations? x + 5y = 11 x - y = 5

givi [52]

<h2>The required solution is x = 6 and y = 11 </h2>

Step-by-step explanation:

Given system of equations are

x+5y = 11 and x-y =5

$A= \left[\begin{array}{cc}1&5\\1&-1\end{array}\right]$ $X=\left[\begin{array}{c}x\\y\end{array}\right]$

and $B= \left[\begin{array}{c}11\\5\end{array}\right]$

∴AX=B

$adj A = \left[\begin{array}{cc}{-1}&{-5}\\{-1}&1\end{array}\right]$

$A= \left|\begin{array}{cc}1&5\\1&-1\end{array}\right|=-6$

∴ $A^{-1} =\frac{adj A}{|A|}$

So, $A^{-1} =\frac{ \left[\begin{array}{cc}{-1}&{-5}\\{-1}&1\end{array}\right]}{-6}$

$A^{-1} ={ \left[\begin{array}{c \c} {{\frac{1}{6} }}&{\frac{5}{6}}\ \\ {{\frac{1}{6} }}&{\frac{-1}{6}} \end{array}\right]}$

$X =A^{-1}\times B$

⇒ $\left[\begin{array}{c}x\\y\end{array}\right] ={ \left[\begin{array}{c \c} {{\frac{1}{6} }}&{\frac{5}{6}}\ \\ {{\frac{1}{6} }}&{\frac{-1}{6}} \end{array}\right]} \times \left[\begin{array}{c}11\\5\end{array}\right]$

⇒ $\left[\begin{array}{c}x\\y\end{array}\right] ={ \left[\begin{array}{c} {6}\\ {11} \end{array}\right]}$

∴ x= 6 and y = 11

The required solution is x = 6 and y = 11

7 0

3 years ago

The slope of the line below is -1/7. Write a point-slope equation of the line using the coordinates of the labeled point ( 3, 3)

Varvara68 [4.7K]

Y - 3 = -1/7(x - 3)

answer is B.

hope it helps

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4 years ago

What is the value for y? Enter your answer in the box. y =

jeka94

Answer:12

Step-by-step explanation:

4 0

4 years ago

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