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2 years ago

Simplify the expression. 2(3y - 7) - 5y(2 - y)

Mathematics

2 answers:

never [62]2 years ago

8 0

Answer: The required simplified form of the given expression is $5y^2-4y-14.$

Step-by-step explanation: We are given to simplify the following expression :

$E=2(3y-7)-5y(2-y).$

To simplify the given expression, we need to evaluate the bracket first.

The simplification is as follows :

$E\\\\=2(3y-7)-5y(2-y)\\\\=6y-14-10y+5y^2\\\\=5y^2-4y-14.$

Thus, the required simplified form of the given expression is $5y^2-4y-14.$

meriva2 years ago

5 0

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2 years ago

The sum of two numbers is -6. The difference is 16. Find the two numbers.

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Answer:

$-5\:\mathrm{and}\: 11$

Step-by-step explanation:

We can write the following system of equations:

$\begin{cases}x+y=6\\x-y=16\\\end{cases}$

Adding both equations together, we isolate $x$ and get:

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Plugging $x=11$ in any of the equations, we can solve for $y$ :

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2 years ago

**Answer the question.**

guapka [62]

Answer:

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Step-by-step explanation:

y=mx+b

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2 years ago

A room has a rectangular floor that is 15 feet by 21 feet. What is the area of the floor in square yards ?

Soloha48 [4]

Answer:

Hey There!

Let's solve...

Here it is a rectangular floor with length =21 cm and width =15cm

$area = l \times w \\ = 21 \times 15 \\ = 315 {ft}^{2} \\ \\$

So now We need to convert it to yards square

$315ft^{2} \times \frac{ {1yd}^{2} }{ {9ft}^{2} } \\ \\ = \cancel{315ft^{2}} \: ^{35} \times \frac{ {1yd}^{2} }{ \cancel{9 {ft}^{2} }} \\ \\ = 35 {yd}^{2}$

So how this 9 ft^2 came??

Let's know

$ft \to \: yards \\ \\ 3ft = 1yd \\ \\ {3ft}^{2} = {1yd}^{2} \\ \\ \boxed{ {9ft}^{2} = {1yd}^{2}}$

<h2>I hope it is helpful to you...</h2><h3>Cheers!_______</h3>

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2 years ago

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alukav5142 [94]

Answer:

idk

Step-by-step explanation:

sorry i needed the points sorry

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3 years ago