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Tanya [424]
2 years ago
7

If x = 3 and y = -2, what is the value of the expression x^3-2xy^2?

Mathematics
1 answer:
Nana76 [90]2 years ago
7 0

Answer:

3

Step-by-step explanation:

The expression is x^3-2xy^2. To find the value, substitute the values x = 3 and y =-2 then follow order of operations.

x^3-2xy^2\\3^3 -2(3)(-2)^2\\27 -2(3)(4)\\27 - 24\\3

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The equation y=2(x-1)^2-5y=2(x−1)
marin [14]

Answer:

(b) It is symmetrical about x = 1

Step-by-step explanation:

Given

y = 2(x - 1)^2 - 5

See attachment for options

Required

True statement about the graph

First, we check the line of symmetric

y = 2(x - 1)^2 - 5

Expand

y = 2(x^2 - 2x + 1) - 5

Open bracket

y = 2x^2 - 4x + 2 - 5

y = 2x^2 - 4x -3

A quadratic equation y = ax^2 + bx + c has the following line of symmetry

x = -\frac{b}{2a}

By comparison, the equation becomes:

x = -\frac{-4}{2*2}

x = \frac{4}{4}

x = 1

Hence, the line of symmetry is at: x = 1

(b) is true.

8 0
3 years ago
What is the equivalent fraction for 1/2​
allochka39001 [22]
It could be:

2/4
4/8
8/16
3/6
5/10
6/12
6 0
3 years ago
Read 2 more answers
Given the graph of a degree 3 polynomial below, complete the table of values for either the x-value of a zero, or the multiplici
leva [86]

The roots or zeros of a polynomial are the points it crosses the x-axis.

The roots of the polynomial in order from least to greatest are -5, 0 and 5

From the graph (see attachment), we have the following highlights

  • <em>The graph cross the x-axis at x = -5</em>
  • <em>The graph cross the x-axis at x = 0</em>
  • <em>The graph cross the x-axis at x = 5</em>

The points at which the graph crosses the x-axis are the roots of the graph.

So, the roots are: -5, 5 and 5

Read more about the roots of a polynomial at:

brainly.com/question/7921963

8 0
2 years ago
Ivan tried to evaluate the expression 6 - 2 + 4 x 9. Here is his work:
faltersainse [42]

I believe he is correct because you add/subtract from left to right, hence

6-2 comes first.

PEMDAS

()^X/+-

4 0
3 years ago
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Alana walks 5/6 of a mile to a park. Dane walks 1/2 of the distance Alana walks to get to the park. How far does Dane walk to th
Andru [333]

Hi There!

Find a fraction that can be cut in half,

5/6 = 10/12

Dane walks half the distance,

Half of 10/12 is 5/12

Answer: Dane walks 5/12 of a mile to a park.

Hope This Helps :)

6 0
3 years ago
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