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2 years ago

Is -0.4 a rational number?

Mathematics

1 answer:

Novosadov [1.4K]2 years ago

5 0

No it is not hope this helps

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2 years ago

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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.

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3 years ago

What is 20p-35=85 an example of?

Effectus [21]

Answer:

An algebraic equation

Step-by-step explanation:

This type of equation in the form of a mathematical statement. Thistwo equal has equal expressions. So 20p-35=85 is an algebraic equation because when we find the value of p then 20p-35 will be equal to 85.

HOPE IT HELPED

7 0

3 years ago

Is -0.4 a rational number?​

Is -0.4 a rational number?