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photoshop1234 [79]
3 years ago
5

Simplify (x -3)(x + 7) using the table method, and identify the resulting

Mathematics
2 answers:
ahrayia [7]3 years ago
7 0

Answer:

The simplified form of given expression is x^2+4x-21.

Step-by-step explanation:

The given expression is

(x-3)(x+7)

Here, we have to factors (x-3) and (x+7).

Factor (x-3) has two terms x and -3. Write these terms in first row.

Factor (x+7) has two terms x and 7. Write these terms in first column.

Now, find the elements of the table by multiplying corresponding rows and columns.

The elements of the table are x², -3x, 7x, -21.

Now, add all these elements.

x^2-3x+7x-21=x^2+4x-21

Therefore the simplified form of given expression is x^2+4x-21.

xxTIMURxx [149]3 years ago
4 0
(x-3)(x+7) —> multiply them together I do it by FOIL which stands for Firsts Inners Outers Lasts

x’(squared)+7x-3x-21 —> simplify

x(squared)+4x-21
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Points B and B' have symmetry with respect to P. Find the coordinates of P when B is (2, 8) and B' is (2, 2). A. (2, 5) B. (0, 5
Alecsey [184]

Answer:

A. (2, 5)

Step-by-step explanation:

If B and B' have symmetry, then P is a midpoint between those points. We can determinate the location of point P by using the midpoint equation, whose vectorial form is:

P(x,y) = \frac{1}{2}\cdot B(x,y)+\frac{1}{2}\cdot B'(x,y) (Eq. 1)

If we know that B(x,y) = (2,8) and B'(x,y) = (2,2), then the location of P is:

P(x,y) = \frac{1}{2}\cdot (2,8)+\frac{1}{2}\cdot (2,2)

P(x,y) = (1, 4)+(1,1)

P(x,y) = (2, 5)

Which corresponds to option A.

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3 years ago
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3 years ago
Ten more than 6 times a number is 4 less than 4 times the number. Please help me!!
Y_Kistochka [10]
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No links! & help me please
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Answer:

150.72 units³

Step-by-step explanation:

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V = pi (3.14) r² h

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V = 150.72 units³

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