3 years ago

Compelte the solution of the equation find the value of y when x equals 2 -7x+2y=4

Mathematics

1 answer:

vodka [1.7K]3 years ago

7 0

-7*2 = -14

-14 + 2y = 4

Add 14 to both sides

2y = 18

y = 9

Your answer is 9.

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Given: 18x-2(3x+1)=5x-16<br> Prove: x=-2

zlopas [31]

Answer:

True

Step-by-step explanation:

Evaluate 18 x - 2 (3 x + 1) = 5 x - 16 where x = -2:

-2×18 - 2 (1 - 2×3) = -2×5 - 16

3 (-2) = -6:

-2×18 - 2 (-6 + 1) = -2×5 - 16

1 - 6 = -5:

-2×18 - 2-5 = -2×5 - 16

18 (-2) = -36:

-36 - 2 (-5) = -2×5 - 16

-2 (-5) = 10:

10 - 36 = -2×5 - 16

5 (-2) = -10:

10 - 36 = -10 - 16

10 - 36 = -26:

-26 = -10 - 16

-10 - 16 = -26:

-26 = -26

-26 is equal to -26:

Answer: True

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2 years ago

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What is the expression for "the difference of 3 and 5 times a number"

soldi70 [24.7K]

(3 - 5)x

Hope this helps! :)

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2 years ago

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What is 9,276 divided by 8

mamaluj [8]

9,276÷8=1,159.5 i hope i helped you i am a 3rd grader

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3 years ago

Find the inverse of the matrices if they Exist. Use the algorithm introduced in the section. [1 0 -2 -3 1 4 2 -3 4]

KiRa [710]

Answer:

\frac{1}{2} \left[\begin{array}{ccc}16&6&2\\20&8&2\\7&3&1\end{array}\right]

Step-by-step explanation:

Given is a matrix 3x3 as

$\left[\begin{array}{ccc}1&0&2\\-3&1&4\\2&-3&4\end{array}\right]$

|A| =2 hence inverse exists.

Cofactors are 16 20 7

6 8 3

2 2 1

Hence inverse =

$\frac{1}{2} \left[\begin{array}{ccc}16&6&2\\20&8&2\\7&3&1\end{array}\right]$

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2 years ago

-2=g-9 <br> one step equation!

Anit [1.1K]

-2=g-9
-2-g=-9
g=-9+2
g=7

Hope it's helpful!!

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2 years ago