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LuckyWell [14K]
3 years ago
14

A student is given the problem: x^3+7x+9. Which of the following statements is false? A. Completing the square cannot be used to

solve the given equation. B. Completing the square can only be used to solve a quadratic equation. C. Completing the square can be used to solve the given equation. D. Completing the square cannot be used because of the x^3 term.
Mathematics
1 answer:
oksano4ka [1.4K]3 years ago
6 0

Answer:

  <u>False</u>: C. Completing the square can be used to solve the given equation.

Step-by-step explanation:

First of all, no equation is given. Any answer that suggests a way of finding solutions to the given equation will be false.

The statement of B is debatable. The method of completing the square is most often used for quadratics, but might reasonably be applied in any situation where a perfect square can be created by regrouping the terms.

Statements A and D essentially say the same thing. Both are true. That fact makes statement C false. Statement C is the one you're looking for.

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What is the equation of a line perpendicular to -x +2=y that intersects the line at (-1,5, 3,5)?
Mazyrski [523]

Answer:

B

Step-by-step explanation:

slope equals 1 and y-int equals 5

6 0
3 years ago
What is the slope for 22x-5y=-8
kvv77 [185]

Answer:

22/5 is the slope I think

Step-by-step explanation:

22x-5y=-8

-22x

-5y=-8-22x

Divide by -5

Y= 8+22x/5

7 0
3 years ago
The cost to mail a package is $8 for the first 4 pounds and 25 cents for each additional ounce. Which of the following functions
Rina8888 [55]

Answer:

f(x) = 8 + 0.25x

Step-by-step explanation:

The minimum cost is $8, for up to 4 pounds.

The added cost is ($0.25/oz)(x), where x is trhe ounces over 4 pounds

The total cost is the sum of these two:

f(x) = 8 + 0.25x

3 0
2 years ago
1, 8, 27, 64 what are the next five numbers
Thepotemich [5.8K]

125, 216, 343, 512, 729

the numbers given in the sequence are recognisable as cubes

1 = 1³, 8 = 2³, 27 = 3³, 64 = 4³

the next five terms will be

5³ = 125, 6³ = 216, 7³ = 343, 8³ = 512 and 9³ = 729


6 0
4 years ago
How would the sum of cubes formula be used to factor x3y3+343? Explain the process. Do not write the factorization.
Zepler [3.9K]

x^3y^3 + 343

The way the sum of cubes works is by taking the roots of each term and applying the formula.

The sum of cubes is as follows:

a^3 + b^3 = (a + b)(a^2 - ab + b^2)

In this case, we would display it like this:

x^3y^3 + 343 = (xy + 7)(x^2y^2 - 7xy + 49)


7 0
4 years ago
Read 2 more answers
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