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melisa1 [442]
3 years ago
13

(4x2y3 + 2xy2 – 2y) – (–7x2y3 + 6xy2 – 2y) i need help solving

Mathematics
1 answer:
lubasha [3.4K]3 years ago
5 0

Answer:

\huge \boxed{11x^2 y^3-4xy^2 }

Step-by-step explanation:

(4x^2y^3  + 2xy^2  - 2y) - (-7x^2 y^3  + 6xy^2  -2y)

Distribute the negative sign to the terms in the bracket.

(4x^2y^3  + 2xy^2  - 2y) +7x^2 y^3  - 6xy^2  +2y

Grouping like terms.

(4x^2y^3 +7x^2 y^3) + (2xy^2 - 6xy^2 ) +( - 2y   +2y)

Combining like terms.

(11x^2 y^3) + (-4xy^2 ) +(0)

11x^2 y^3-4xy^2

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Can you completely over a 4 ft by 8 ft area with 3 ft by 3 ft tiles?
Vika [28.1K]

Yes, but not without cutting some of the tiles into smaller pieces.

The length of the area is 8-ft.  That's (2 and 2/3) tiles long.

The width of the area is 4-ft.  That's (1 and 1/3) tiles wide.

So you can't just put down rows and columns of whole tiles
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______________________________________

Another way to look at it:

-- The area of the whole big plot is  (8 x 4) = 32 square feet.

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-- You can't cover 32 square feet with 9-square-feet pieces.
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3 years ago
Textbooks are exempted from PST in Ontario. If the total cost of a book
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Answer:

4.24

Step-by-step explanation:

Total price = price of the book + 5% of the price of the book

T = total price   P = price of the book G = GST

T = P + G

and

G = 5% of P = 0.05P

therefore

T = P + 5%P = 1P + 0,05P = 1.05P

P = T/1.05 = 89/1.05 ≅ 84.76 (it is 84.7619047619)

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3 years ago
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2 years ago
you plant 15 tulip bulbs and 10 of them grow into flowers to bloom. If you plant 21 more re tulips bulbs, predict how many of th
harina [27]

Answer:

14 more flower would bloom if 21 more tulip bulb is planted.

Step-by-step explanation:

Given ratio for tulip bulbs and flowers is 15:10.

Now, finding number of flower to bloom if 21 tulip bulb are planted.

Assume if 21 tulip bulbs are planted then number of flower would bloom be"x"

ratio given: \frac{Tulip\ bulbs}{ Flower} = \frac{15}{10} = \frac{21}{x}

Cross multiplying the ratio to get:

⇒x= \frac{21\times 10}{15} = \frac{210}{15}

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3 years ago
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