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Ket [755]
2 years ago
9

What is -4 x 8 x n simplified?

Mathematics
1 answer:
Galina-37 [17]2 years ago
3 0

Answer:

It's -32x^2

Step-by-step explanation:

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What is the smallest power of 10 that exceeds this number 235,452?
taurus [48]

{10}^{6}
10 to the power of 6 equals 1,000,000.
8 0
3 years ago
Find the sum of 7a³ + 14a + 12 and -6a³ + 12a² -7
maw [93]

Answer: a^3+12a^2+14a+5

Step-by-step explanation:

7a^3+14a+12+(-6a^3+12a^2-7)

7a^3+14a+12-6a^3+12a^2-7\\a^3+12a^2+14a+5

7 0
3 years ago
The augmented matrix of a system of equations has been transformed to an equivalent matrix in​ row-echelon form. Using​ x, y
jenyasd209 [6]

Answer: The system of equations is:

x + 2y + 2 = 4

y - 3z = 9

z = - 2

The solution is: x = -22; y = 15; z = -2;

Step-by-step explanation: ONe way of solving a system of equations is using the Gauss-Jordan Elimination.

The method consists in transforming the system into an augmented matrix, which is writing the system in form of a matrix and then into a <u>Row</u> <u>Echelon</u> <u>Form,</u> which satisfies the following conditions:

  • There is a row of all zeros at the bottom of the matrix;
  • The first non-zero element of any row is 1, which called leading role;
  • The leading row of the first row is to the right of the leading role of the previous row;

For this question, the matrix is a Row Echelon Form and is written as:

\left[\begin{array}{ccc}1&2&2\\0&1&3\\0&0&1\end{array}\right]\left[\begin{array}{ccc}4\\9\\-2\end{array}\right]

or in system form:

x + 2y + 2z = 4

       y + 3z = 9

               z = -2

Now, to determine the variables:

z = -2

y + 3(-2) = 9

y = 15

x + 30 - 4 = 4

x = - 22

The solution is (-22,15,-2).

4 0
3 years ago
Determine whether y varies directly with x. If so, find the constant of variation k.
musickatia [10]
The answer is the option D because the formula is y upon x
3 0
3 years ago
At a school dance, the ratio of girls to boys is 8:3. If there are 528 students at the dance, how many are boys and how many are
weqwewe [10]

Answer:

144 boys and 384 girls

Step-by-step explanation:

8 girls to every 3 boys. You can make an equation to solve this: 8x + 3x = 528. 528 = 11x. Then divide 528 by 11 to get 48. x=48. 8(48) = 384 girls. 3(48) = 144 boys.

6 0
2 years ago
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