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Zepler [3.9K]
2 years ago
10

Is -2 a solution to 4x^(3)-x^(2)+16x-4

Mathematics
1 answer:
sergiy2304 [10]2 years ago
3 0

Answer:

Not a solution

Step-by-step explanation:

In order for x=-2 to be a solution, the result after substituting must be 0:

4(-2)^3-(-2)^2+16(-2)-4\stackrel{?}{=}0

4(-8)-4-32-4\stackrel{?}{=}0

-32-40\stackrel{?}{=}0

-72\neq0

Therefore, x=-2 is not a solution to 4x^3-x^2+16x-4

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Helppppppppp
Anettt [7]

Answer:

The total number of U.S. high school students that played on a sports team that year can be estimated to be 7,950,000.

Step-by-step explanation:

From the random sample, we can expect that \frac{250000}{500000}=\frac{1}{2} of all students played on a sports team that year. So in the bigger sample of 15900000 high school students, we can expect 15900000 \cdot \frac{1}{2} = 7950000 students to have played on a sports team that year.

7 0
3 years ago
What is 9/20 and 6/11 in decimal form
Rama09 [41]

Answer:

\frac{9}{20} = 0.45

\frac{6}{11} = 0.54 repeating

Step-by-step explanation:

You can solve these easily with a calculator.

\frac{9}{20} = 0.45

\frac{6}{11} = 0.54 repeating

8 0
3 years ago
What sum is represented by the arrow diagram?
Julli [10]

Answer:

Would it be 1?

Step-by-step explanation:

I'm not that sure but it seems it goes up to 4 so 4- -3 = 1. Exuse me if my wrong..

4 0
3 years ago
Complete the equation of the line through (6,-6)and (8,8)
liberstina [14]

Answer:

vdxfvxdvd fdxbvdfbdf geg dgb v b b begw

Step-by-step explanation:

7 0
3 years ago
Find the value of x.
Serjik [45]

Answer:

Step-by-step explanation:

Comment

The square of the tangent = the external segment of the secant * the full length of the secant.

Formula

(x - 1)^2 = (x - 3)*(x - 3 + 5)                   Combine the right

Solution

(x - 1)^2 = (x - 3)*(x +2)                         Remove the brackets on both sides

x^2 - 2x + 1 = x^2 -3x + 2x - 6            Combine the right

x^2 - 2x + 1 = x^2 - x - 6                     Subtract x^2 from both sides

-2x + 1 = - x - 6                                    Add 6 to both sides

-2x + 1 + 6 = -x - 6 + 6                         Combine

-2x + 7 = - x                                         Add 2x to both sides

-2x+2x + 7 = -x+2x                              Combine

7 = x

Answer

x = 7

5 0
2 years ago
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