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jekas [21]
3 years ago
8

2x3y − 3x2 + 7y2x − 12y written in standard form

Mathematics
2 answers:
AlekseyPX3 years ago
7 0
Hey there, 

Lets solve this equation step by step. 

⇒ First of all, <span>Simplify </span><span>2x×3y</span><span> to </span><span>6xy 
</span>
6xy-3x^2+7y * 2x-12y 

⇒ Now <span>Simplify </span><span>7y×2x</span><span> to </span><span>14yx
</span>
6xy-3x^2+14yx-12y 

⇒ <span>Gather like terms 
</span>
(6xy+14xy)-3x2-12y&#10; &#10; 

⇒ <span>Simplify everything 
</span>
20xy-3x^2-12y 

                                        Hence Simplified. 

Masteriza [31]3 years ago
7 0
Okay, so if you have 2x*3y-3y*2+7y*2x-12y, add all your like terms together. If you have a constent, add it to the equation.

4x-2y*2 (<- I think this is my correct answer, haven't done this in a while.)
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QveST [7]

Answer:

A)

Step-by-step explanation:

Let me know if anything is unclear :)

6 0
3 years ago
. <br> A jacket costs $50. The sales tax is 7%. How much tax will you pay?<br> i neeed this fast pls
Dahasolnce [82]

Answer:

You will pay $3.50 tax

Step-by-step explanation:

$50 * 7% =

$50 *0.07 =

$3.50

8 0
3 years ago
6. The base of a triangular field is three times its height. If the cost of cultivating the field
dedylja [7]

Answer:

base = 519.62, height = 173.21 m

Step-by-step explanation:

Let the base and height of the triangle be represented by b and h respectively.

Thus,

b = 3h

Area of a triangle = \frac{1}{2} x base x height

For the given triangle,

area = \frac{1}{2} x b x 3h

       = \frac{3}{2}bh

Area of the triangle = \frac{3}{2}bh

To determine the number of hectares,

36 per hectare = 486

hectare = \frac{486}{36}

             = 13.5

numbers of hectares = 13.5

Area of the hectares = number of hectares x 10 000 m²

                                   = 13.5 x 10 000

                                  = 135000

Total area of the hectares = 135 000 m²

So that,

area of the hectares = area of the triangle

area of the triangle = \frac{3}{2}bh

135 000 = \frac{3}{2}bh

270000 = 3bh

bh = \frac{270000}{3}

     = 90000

bh = 90000

But, b = 3h

3h x h = 90000

3h^{2} = 90000

h^{2}  = \frac{90000}{3}

     = 30000

h = \sqrt{30000}

  = 173.2051

h = 173.21 m

So that,

b = 3 x 173.2051

  = 519.6153

b = 519.62

Therefore, the base of the triangle is 519.62 m, while the height is 173.21 m.

7 0
4 years ago
What percent of 180 is 45? A. 4.5% B. 18% C. 22% D. 25%
Ber [7]

Answer:

D. 25%

Step-by-step explanation:

45/180=0.25

0.25 into a percent is 25%

6 0
3 years ago
Read 2 more answers
Use the approach in Gauss's problem to find the sums of the arithmetic sequences below
I am Lyosha [343]

Answer:

15150 is the required sum.

Step-by-step explanation:

Gauss method of summing sequences like this is to add the first term to the last term, the second term to the second to the last term and so on until you get to the middle. By doing this, you will always get the same sum. Then you divide the number of terms by two, because you are technically adding the first half of the sequence to the second half. You then multiply the sum of each pair that gave the same number with the number of terms that has been divided by 2. For this problem we have:

3 + 300 = 303

6 + 297 = 303

9 + 294 = 303

and so on.

100÷ 2 = 50.

Therefore we have 50 * 303 = 15150 is the required sum.

5 0
3 years ago
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