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balandron [24]
3 years ago
9

HELPPPPPPP PLZZZZ I DONT GET IT

Mathematics
1 answer:
expeople1 [14]3 years ago
7 0

Answer:

See below

Step-by-step explanation:

1) \:  \frac{1}{2}  \times 5 \times 6 = 15 \:  {cm}^{2}  \\  \\ 2) \:  \frac{1}{2}  \times 10 \times 6 = 30 \:  {cm}^{2}   \\  \\ 3) \: 5 \times 3 = 15 \:  {cm}^{2}  \\  \\ 4) \: 10 \times 6= 60\:  {cm}^{2}

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Ludmilka [50]
The answer is (c-a , b)
8 0
3 years ago
Evaluate <br> 2s+4t for s=3 and t =-2
Maksim231197 [3]

Answer:

-2

Step-by-step explanation: All you have to do is insert the s and t value they gave you into the equation.

2s + 4t = ?

2(3) + 4(-2) = ?

6 + (-8) = ?

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7 0
3 years ago
Answer please I’m dying from math
charle [14.2K]

Answer:

\huge\boxed{\text{D)} \  15x^4 + 2x^3 - 8x^2 - 22x - 15}

Step-by-step explanation:

We can solve this multiplication of polynomials by understanding how to multiply these large terms.

To multiply two polynomials together, we must multiply each term by each term in the other polynomial. Each term should be multiplied by another one until it's multiplied by all of the terms in the other expression.

  • <em>We can do this by focusing on one term in the first polynomial and multiplying it by </em><em>all the terms</em><em> in the second polynomial. We'd then repeat this for the remaining terms in the second polynomial.</em>

Let's first start by multiplying the first term of the first polynomial, 3x^2, by all of the terms in the second polynomial. (5x^2+4x+5)

  • 3x^2 \cdot  5x^2 = 15x^4
  • 3x^2 \cdot 4x = 12x^3
  • 3x^2 \cdot 5 = 15x^2

Now, we can add up all these expressions to get the first part of our polynomial. Ordering by exponent, our expression is now

  • \displaystyle 15x^4 + 12x^3 + 15x^2

Now let's do the same with the second term (-2x) and the third term (-3).

  • -2x \cdot 5x^2 = -10x^3  
  • -2x \cdot 4x = -8x^2
  • -2x \cdot 5 = -10x
  • Adding on to our original expression: \displaystyle 15x^4 + 12x^3 - 10x^3 + 15x^2 - 8x^2 - 10x

  • -3 \cdot 5x^2 = -15x^2
  • -3 \cdot 4x = -12x
  • -3 \cdot 5 = -15
  • Adding on to our original expression: \displaystyle 15x^4 + 12x^3 - 10x^3 + 15x^2 - 8x^2 - 15x^2 - 10x - 12x - 15

Phew, that's one big polynomial! We can simplify it by combining like terms. We can combine terms that share the same exponent and combine them via their coefficients.

  • 12x^3 - 10x^3 = 2x^3
  • 15x^2 - 8x^2 - 15x^2 = -8x^2
  • -10x - 12x = -22x

This simplifies our expression down to 15x^4 + 2x^3 - 8x^2 - 22x - 15.

Hope this helped!

7 0
3 years ago
Read 2 more answers
Which of the following sets is not finite?
Alja [10]
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8 0
3 years ago
A certain shade of paint is made by mixing 5 parts blue paint with 2 parts white paint. To get the same shade of paint how much
uysha [10]
The concept that is useful to answering the question above is the ratio -proportion. Let x be the number of white paint that should be used in the mixture. The ratio - proportion expression of the given above is , 
 
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Solving for x gives an answer of x = 3.4. Thus, 3.4 quarts of white paint should be used for the mixture.
5 0
3 years ago
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