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3 years ago

7

What is the simplified form of this expression? (-3x2 + 2x − 4) + (4x2 + 5x + 9)

2 answers:

olga2289 [7]3 years ago

3 0

Answer:

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

olya-2409 [2.1K]3 years ago

3 0

Answer:

$\large \boxed{\sf \ \ x^2 + 7x + 5 \ \ }$

Step-by-step explanation:

$\mathrm{\sf (-3x^2 + 2x -4) + (4x^2 + 5x + 9)}$

Remove brackets.

$\large{\sf -3x^2 + 2x -4 + 4x^2 + 5x + 9}$

Group like terms.

$\large{\sf -3x^2 + 4x^2 + 2x + 5x + 9 -4}$

Combine like terms.

$\large{\sf x^2 + 7x + 5}$

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Please help need an answer by today

love history [14]

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If that's the question, then . . .

Since the store marks up their cost by 60% before they sell
the thing, the price they sell it for is

(1.60 of their cost).

You know their cost. The selling price is (1.60 x $80) .

8 0

3 years ago

Find the Total surface area of a cone if it's slant height is 21m and diameter of it's base is 24m.

kherson [118]

<h3><u>Answer :- </u></h3>

The total surfAce area of cone is <u>1244.57m².</u>

<h3><u>Step-by-step</u><u> </u><u>explanation</u><u> </u><u>:</u><u>-</u><u> </u></h3>

<u>To </u><u>find </u><u>:</u><u>-</u><u> </u>

The total surface area of cone..

<h3><u>Solution :- </u></h3>

Given that ,

The slant height of the cone = 21m.
Diameter of it's base = 24m.

<h3><u>♦</u><u> </u><u>Radius is </u></h3>

<u>=</u>> Diameter / 2

=> 24 / 2

=> 12m

<h3>As we know that , </h3>

<u>Total surface area of cone = πr ( r + L ) .</u>

<h3><u>Where</u><u> </u><u>we </u><u>know</u><u>,</u></h3>

π = 22/7
r = Radius ( radii )..
L = Slant height.

<h3>According to the question :- </h3>

The total surface of cone is,

<u>=> Total surface area = πr { r + L } ..</u>

$= \frac{22}{7} \times 12 \times (12 + 21)$

$= \frac{22}{7} \times 12 \times 33$

$= (22 \times 12 \times 33) \div 7$

$= (726 \times 12) \div 7$

$= 8712 \div 7$

$= 1244.57 {m}^{2}$

• Therefore , The total surface area of cone is <u>1244.57m².</u>

Hope this helps you :)

8 0

2 years ago

Read 2 more answers

Find all Values of b that will make the polynomial a perfect square trinomial.

weeeeeb [17]

Answer:

10,404/334,084

Step-by-step explanation:

Given the polynomial

289r^2 - 102r + c

We are to find the value of c that will make it a perfect square

Divide through by 289

289r²/289 - 102r/289 + c/289

Half of the coefficient of r is 1/2(102/289)

Half of the coefficient of r = 102/578

Square the result

r² = (102/578)²

r² = 10,404/334,084

Hence the required constant is 10,404/334,084

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3 years ago

How many pounds are there in a kg

Dafna11 [192]

1 lb = 0.45359237 kg

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3 years ago

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kati45 [8]

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Step-by-step explanation:

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3 years ago

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