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4 years ago

Which algebraic expression is a polynomial?

1 answer:

3 0

The correct answer is b.
A polynomial is an expression that contains terms with the form ax^n where a is equal to any number (negative or positive) and n is the power, or exponent, of x (squared, cubed, etc.). In order for it to be a polynomial, the exponent must be positive. Terms that contain square roots are not polynomials as the exponent is considered radical (1/2). Thus, b is the correct answer.

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Solve the system of equations x - 2y = – 7 and -3x – 2y = 29 by combining the equations.

Ksivusya [100]

Answer:

x = - 9, y = -1

Step-by-step explanation:

Given:

$\begin{bmatrix}x-2y=-7\\ -3x-2y=29\end{bmatrix}$

Solve:

$\mathrm{Substitute\:}x=-7+2y$

$\begin{bmatrix}-3\left(-7+2y\right)-2y=29\end{bmatrix}$

$\begin{bmatrix}21-8y=29\end{bmatrix}$

$\mathrm{For\:}x=-7+2y$

$\mathrm{Substitute\:}y=-1$

$x=-7+2\left(-1\right)$

$x=-9$

$\mathrm{Thus, Answer:x=-9,\:y=-1}$

[RevyBreeze]

5 0

3 years ago

Find two numbers whose product is 20 and whose sum is 12

ICE Princess25 [194]

10 * 2 = 20
2 + 10 = 12

Answer 2 and 10

6 0

4 years ago

Describe the process for calculating the volume of a pyramid. Use complete sentences.

Georgia [21]

For the answer to the question above, this question is incomplete. I've answered this question before.
Is it like this?
V = (1/3) * (area of the base) * height

If you have a pyramid with a square base, you just multiply the length of both sides together. For example, if the pyramid was 9 inches on a side, the area of the base is 9 * 9 = 81 sq. inches. 

Then you multiply that by the height and finally take 1/3 of the result. For example, if the pyramid was 10 inches high, you multiply 81 sq. inches x 10 inches = 810 cubic inches. But you have to remember to take a third of that result. 810 cubic inches / 3 = 270 cubic inches.
I hope this helps

8 0

3 years ago

What property will you use to solve this equation; 19+n=30

mr Goodwill [35]

Answer:

i think its multiplication property of equality

Step-by-step explanation:

19 + n = 30

19 + n - 19 = 30 - 19

n = 11

6 0

3 years ago

The distance that a jogger travels at a constant speed of 6.5 miles per hour can be modeled by the linear function f(x)=6.5x, wh

Sophie [7]

Domain : [ -infinite , infinite [
graph should be going up diagonally .

7 0

4 years ago