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alex41 [277]
3 years ago
14

Hey what's the answer

)" alt=" - 11a(3a + 2a)" align="absmiddle" class="latex-formula">
​
Mathematics
2 answers:
allsm [11]3 years ago
7 0

Answer:

- 11a(3a + 2b) \\  =  - 11 \times 3 \times a \times a + ( - 11 \times 2 \times a \times a) \\  =  - 33 {a}^{2}  - 22ab

<em><u>I </u></em><em><u>hope </u></em><em><u>it </u></em><em><u>helps</u></em>

<em><u>have </u></em><em><u>a </u></em><em><u>great </u></em><em><u>day </u></em>

<em><u>#Liliflim✌️</u></em>

olya-2409 [2.1K]3 years ago
5 0

- 11a(3a + 2) \\  =  - 11a \times 3a \:  \:   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: - 11a \times 2a \\  =  - 11 \times 3 \times a \times a \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   - 11 \times 2 \times a \times a \\  =\boxed  {- 33a {}^{2}  - 22a {}^{2}}

I \: hope \: it \: will \: help \: you

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16 rounded to the nearest 10 is 20

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A recipe for salad dressing uses 60mL of vinegar for 240mL of oil. Emily has 40mL of vinegar,how much should she use? Show your
soldier1979 [14.2K]

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4 years ago
A theater has a seating capacity of 750 and charges $3 for children, s5 for students, and $7 for adults. At a certain screening
-BARSIC- [3]

Answer:

Between 150 and 450

Step-by-step explanation:

We are going to find the number by resolving  a system of linear equations.

First we write the system equations :

C+S+A=750

Where C : children, S : students and A : adults

The equation represents the ''full attendance''

The second equation :

3C+5S+7A=3450

This equation represents the totaled receipts.

The system :

C+S+A=750\\3C+5S+7A=3450

has the following associated matrix :

\left[\begin{array}{cccc}1&1&1&750\\3&5&7&3450\end{array}\right]

By performing elementary matrix operations we find that the matrix is equivalent to

\left[\begin{array}{cccc}1&0&-1&150\\0&1&2&600\\\end{array}\right]

The new system :

C-A=150\\S+2A=600

Working with the equations :

C = 150 + A\\S = 600-2A

Our solution vector is :

\left[\begin{array}{c}C&S&A\end{array}\right] =\left[\begin{array}{c}150+A&600-2A&A\end{array}\right]

For example :

If 0 adults attended ⇒ A = 0

C = 150 + 0 \\C = 150\\S = 600 - 2A\\S = 600

This verify the totaled receipts equation :

150($3)+600($5) = $ 3450

A ≥ 0 ⇒ If A = 0 ⇒ C = 150

C = 150 is the minimum children attendance

From the equation :

S = 600 -2A

S ≥0

600 - 2A ≥ 0

600 ≥ 2A

300≥ A

A is restricted to the interval [ 0, 300]

When A = 0 ⇒ C = 150

When A = 300 ⇒C = 150 + A = 150 + 300 = 450

Children ∈ [ 150,450]

With C being an integer number (including 0)

Also S and A are integer numbers (including 0)

7 0
3 years ago
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