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3 years ago

4(x−3)=9 plz answer

Mathematics

1 answer:

dem82 [27]3 years ago

5 0

Step-by-step explanation:

x = 21/4 fraction form and alternative form is 5 1/4

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What is the value of 4 in the decimal 4.706

juin [17]

Answer:

whole number

Step-by-step explanation:

6 0

2 years ago

Find the inverse of this matrix. 1 -1 -1 -1 2 3 1 1 4

zheka24 [161]

Let's use Gaussian elimination. Consider the augmented matrix,

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

• Add row 1 to row 2, and add -1 (row 1) to row 3:

$\left[\begin{array}{ccc|ccc}1 & -1 & -1 & 1 & 0 & 0\\0 & 1 & 2 & 1 & 1 & 0\\0 & 2 & 5 & -1 & 0 & 1\end{array}\right]$

• Add -2 (row 2) to row 3:

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

• Add -2 (row 3) to row 2:

$\left[\begin{array}{ccc|ccc}1 & -1 & -1 & 1 & 0 & 0\\0 & 1 & 0 & 7 & 5 & -2\\0 & 0 & 1 & -3 & -2 & 1\end{array}\right]$

• Add row 2 and row 3 to row 1:

$\left[\begin{array}{ccc|ccc}1 & 0 & 0 & 5 & 3 & -1\\0 & 1 & 0 & 7 & 5 & -2\\0 & 0 & 1 & -3 & -2 & 1\end{array}\right]$

So the inverse is

$\begin{bmatrix}1&-1&-1\\-1&2&3\\1&1&4\end{bmatrix}^{-1} = \boxed{\begin{bmatrix}5&3&-1\\7&5&-2\\-3&-2&1\end{bmatrix}}$

3 0

3 years ago

Want points answer me question

WITCHER [35]

Answer:

$110

Step-by-step explanation:

1. The total cost:

(3 * 65) + (2 * 70) + (1 * 55) -> cost of dresses + jeans + earrings

Total: 195 + 140 + 55 = 390.

2. Money leftover:

500 - 390 = $110.

4 0

3 years ago

Chen has 4 pizzas to share with his friends. If each person will eat 2/3 of a pizza,how many people can share the pizzas?

sweet-ann [11.9K]

Answer:6 people

Step-by-step explanation: divide 4 by 2/3

4 0

3 years ago

Rewrite the equation in ax+by=c form. Y+3=2(x-5)

Deffense [45]

Y+3=2(x-5)

y+3=2x-10

y+3+10=2x

y+13=2x

2x-y=13

6 0

2 years ago