Find an inequality that you can use to disprove john statement. explain your thinking.

Try this inequality with 0 as the right side.

-x > 0

According to John, we multiply both sides by -1, and the inequality sign does not change direction, so we get this

x > 0

Let's use a number for x that makes the original inequality true.
Let x = -2.

-x > 0

-(-2) > 0

2 > 0

As you can see, -2 does work on the original equation.

Now let's try -2 in John's solution.

x > 0

-2 > 0 which is a false statement.

Now let's solve it again, but we will reverse the inequality symbol when we multiply both sides by -1.

-x > 0

x < 0

Try x = -2.

-2 < 0   which is true

Now it works.

John is incorrect.
If you multiply or divide an equation by a negative number, even if one of its sides is 0, you still must change the direction of the inequality symbol.

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )