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3 years ago

Can someone please answer this question please answer it correctly and lease show work please help me I need it

Mathematics

2 answers:

earnstyle [38]3 years ago

8 0

Answer:

Step-by-step explanation:

The correct answer would be $\frac{-5}{3}$ . Therefore, none of the answer choices fulfill this and A and B are not correct.

siniylev [52]3 years ago

8 0

None of the above it has to be c because A and B are not true

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Translate the statement into an equation: the difference of four times a number and eight is equal to twenty-three less than tha

neonofarm [45]

Let, the number be "x"
Now,
according to the question,
4x -8 = x -23....................This is your equation.

Now solving it,
4x - 8 = x - 23
4x - x = -23 + 8
3x = -15
x = -15 / 3
x = -5

Checking the answer,
4 (-5) - 8 = (-5) - 23
-20 - 8 = -5 - 23
-28 = -28......................................true

6 0

3 years ago

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Zina [86]

Answer:

Step-by-step explanation:

hope this helps!!

4 0

2 years ago

Given -3x + 2y = 1 and x = 5, solve for y. a.-7 b.7 c.-8 d.8

eduard

Answer:

d. 8

Step-by-step explanation:

Given: -3x + 2y = 1 and x = 5

Now plug x =5 in the given equation and find the value of y.

-3(5) + 2y = 1

-15 + 2y = 1

2y = 1 + 15

2y = 16

Dividing both sides by 2, we get

y = 8

Thank you.

7 0

2 years ago

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Which expression is a factor of 12x2 + 29x – 8?

stira [4]

$12x^2 + 29x – 8 \\ \\ 12x^2 + 32x - 3x - 8 \\ \\ 4x (3x + 8) - (3x + 8) \\ \\ (3x + 8)(4x - 1) \\ \\$

The final result is: (3x + 8)(4x - 1).

6 0

2 years ago

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Evaluate the determinant of the matrix. -4 5 6 0 4 4 -2 -5 4 I need the work plz

FromTheMoon [43]

Answer:

-136

Step-by-step explanation:

We have to find the determinant of the following matrix:

$\left[\begin{array}{ccc}-4&5&6\\0&4&4\\-2&-5&4\end{array}\right]$

We can find the determinant by expanding via 1st column. i.e. by taking each element of 1st column and multiplying it by its co-factor matrix as shown below:

det $\left[\begin{array}{ccc}-4&5&6\\0&4&4\\-2&-5&4\end{array}\right]$

= $(-4 \times det \left[\begin{array}{cc}4&4\\-5&4\end{array}\right]) - (0 \times (-4 \times det \left[\begin{array}{cc}5&6\\-5&4\end{array}\right]))+ ((-2) \times det\left[\begin{array}{cc}5&6\\4&4\end{array}\right])\\\\ =-4 \times (16 + 20)-(0)+(-2 \times 20-24)\\\\ =-4(36)+(-2(-4))\\\\ =-144+8\\\\ =-136$

The notation det() stands for determinant of the matrix.

Therefore, the determinant of the given matrix is -136

8 0

2 years ago