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Alex Ar [27]
3 years ago
5

What is the product of 2x2 – 3xy + y2 and 2x – 4y?

Mathematics
1 answer:
Ganezh [65]3 years ago
6 0

Answer:

C. 4x^3 - 14x^2y + 14xy^2 - 4y^3

Step-by-step explanation:

Given:

Product of 2x^2 – 3xy + y^2 and 2x – 4y

Product means multiplication

(2x^2 – 3xy + y^2) (2x – 4y)

Open the bracket

= 4x^3 - 8x^2y - 6x^2y + 12xy^2 + 2xy^2 - 4y^3

Simplify the like terms

= 4x^3 - 14x^2y + 14xy^2 - 4y^3

The answer is

C. 4x^3 - 14x^2y + 14xy^2 - 4y^3

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If a is directly proportional to b, and a = 25 when b = 35, find b when a = 40
koban [17]

If a is directly proportional to b, we have the relationship to be:

\begin{gathered} a\propto b \\ \therefore \\ a=kb \\ where \\ b=constant \end{gathered}

When a = 25, b = 35. Therefore, we can calculate the value of k as follows:

\begin{gathered} 25=35k \\ k=\frac{25}{35} \\ k=\frac{5}{7} \end{gathered}

Therefore, the relationship is given to be:

a=\frac{5}{7}b

When a = 40, we can calculate the value of b to be:

\begin{gathered} 40=\frac{5}{7}b \\ 40\times7=5b \\ 5b=280 \\ b=\frac{280}{5} \\ b=56 \end{gathered}

The value of b is 56.

7 0
1 year ago
-5|x+1|=10 solve for x
katrin [286]

Answer:

x=-3

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
In the diagram provided, line I is parallel to line m. Select which of the following statements could be used to prove that
atroni [7]
<h3>Answer: There is only one answer and it is choice B</h3><h3>Angle 1 and angle 4 are alternate interior angles</h3>

========================================================

Explanation

  • A. This is false because it should be angle 4 + angle 5 = 180 without the angle 6. Adding on angle 6 results in some angle larger than 180. Note how angle 5 = (angle 3)+(angle 6).
  • B. This is true and useful to showing that the three angles of a triangle add to 180 degrees. This is because you'll use the fact that angles 4, 5 and 6 combine to 180 degrees.
  • C. While this is a true statement by the exterior angle theorem, it is not useful to the proof. It is better to state that angle 2 and angle 6 are congruent because they are alternate interior angles.
  • D. Like choice C, it is true but not useful. It's better to say that angle 1 is congruent to angle 4. See choice B above.

Note how it's not enough for a statement to be true. It also needs to be relevant or useful to the context at hand. A more simpler example of this could be stating that x+x = 2x.

8 0
3 years ago
Pls solve it and show your work :((
lisabon 2012 [21]

Answer:

See below

Step-by-step explanation:

To graph the line we need two points, one point is the y-intercept, the second point to be calculated.

Q7

<u>y = -3x + 6</u>

  • The y-intercept is (0, 6)

<u>Let the domain be x = 5 for the second point, then:</u>

  • y = -3*5 + 6 = -15 + 6 = -9
  • The point is (5, -9)

Connect these points to get the graph

Q8

<u>y = 4/5x - 3</u>

  • The y-intercept is (0, -3)

<u>Let the domain be x = 5 for the second point, then:</u>

  • y = 4/5*5 - 3 = 4 - 3 = 1
  • The point is (5, 1)

Connect these two points to get the graph

5 0
2 years ago
Please help quick will give brainly points
k0ka [10]

Answer: They are not inverse.

Step-by-step explanation:

6 0
2 years ago
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