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Shkiper50 [21]
3 years ago
6

GEOMETRY IM STUCK! PLEASE HELP!!

Mathematics
1 answer:
Elza [17]3 years ago
7 0
Um, here is the problem. WE NEED A PICTURE TO ACTUALLY TELL YOU THE ANSWER! DO YOU WANT AN ANSWER OR NOT?????
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I need 20 characters blah blah blah blah blah blah blah blah blah blah​
worty [1.4K]

Answer:

  • <u>Below it is shown the procedure and that +3 is one rational zero.</u>

Explanation:

The function is:

     f(x)=7x^3-5x^2-63x+45

According to the rational roots theorem, the possible rational roots of a polynomial are the negative and positive quotients of the factors of the constant term (45 in this case) divided by the factors of the coefficient of the highest degree term (7 in this case).

Then, the possible rational roots are the divisors of 45 divided by the divisors of 7.

  • Divisors of 45: ±1, ± 3; ± 5, ±9, ±15, ± 45

  • Divisors of 7: ±1, ±7

Then, the possible rational roots are:

  • ±1, ±1/7, ±3, ±3/7, ±5, ±5/7, ±9, ±9/15, ±15, ±15/7, ±45, ±45/7

Now you should test them to find out whether they are factors or not.

You need to find just one ration zero. Thus , I will show you the procedure, with one of them: use 3.

Then, you have to divide the original polynomial by x - 3.

The sythetic division is:

<u>1. Write the root and the coefficients in this form:</u>

+3  |   7     - 5    - 63   +45

     |

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

<u>2. Copy the first coefficient, 7, below the horizontal line:</u>

+3  |   7     - 5    - 63   +45

     |

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

        7

<u />

<u>3. Multiply the root (3) by 7, write the product below the second coefficient, and find the sum: 3 × 7 = 21; 21 + (-5) = 16</u>

+3  |   7     - 5    - 63   +45

     |           21

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

        7      16

<u>4. Multiply the root (3) by 16, write the product below the next coefficient, and find the sum: 3 × 16 = 48;  48 + (-63) = - 15</u>

+3  |   7     - 5    - 63   +45

     |           21    +48

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

        7      16    -15

<u />

<u>5. Multiply the root (3) by -15, write the product below the next coefficient, and find the sum: 3 × (-15)= - 45;  -45 + 45 = 0</u>

+3  |   7     - 5    - 63   +45

     |           21    +48   -45

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

        7      16    -15       0

Since the final total, which is the remainder of the division, is zero, +3 is a rational root of the polynomial.

You can now test others, to find if they are factors too.

6 0
3 years ago
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What is 25% of 192% just to know
Rufina [12.5K]
0.48 because 0.25*1.92=0.48
4 0
3 years ago
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Hurry up please im testing rn
Anon25 [30]

Answer:

<em>B</em>

Explanation:

The Honey Roasted Macadamia nuts are distributed relatively consistently among the lower end of the graph, whereas the Milk Chocolate Macadamia nuts are distributed throughout the entire graph with almost no consistency.

4 0
3 years ago
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What is the surface area of the square pyramid? A net has a square base with side lengths of 2, and 4 triangles with heights of
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Answer:

16 units²

Step-by-step explanation:

Surface area

= square + 4 triangles

= 2² + 4(½ × 2 × 3)

= 4 + 4(3)

= 4 + 12

= 16

7 0
3 years ago
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What multiples of 10 lie between 526 and 552
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10*50,10*30,10*40 are all the multples

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