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Oduvanchick [21]
3 years ago
7

When multiplying an inequality by a negative number, make sure to flip the inequality sign.

Mathematics
2 answers:
nlexa [21]3 years ago
7 0

Answer:

Yes it is true

Take this for example:

If you were to  find <em>n </em>in  

<h2>-4<em>n </em>≥ 12 </h2>

Then you would have to divide both sides by -4 and the inequality sign would flip.

The answer would be:

<em>n </em>≤ -3

The same goes with multiplying.

antoniya [11.8K]3 years ago
6 0
I think it is A. true
when u multiplying an inequality by a negative number and make sure you flip it.
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a chord of 12cm long of 8cm is away from the of the circle what is the lenght of the chord which is 6cm away from the centre
lana66690 [7]

Answer:

The length of the chord is 16 cm

Step-by-step explanation:

Mathematically, a line from the center of the circle to a chord divides the chord into 2 equal portions

From the first part of the question, we can get the radius of the circle

The radius form the hypotenuse, the two-portions of the chord (12/2 = 6 cm) and the distance from the center to the chord forms the other side of the triangle

Thus, by Pythagoras’ theorem; the square of the hypotenuse equals the sum of the squares of the two other sides

Thus,

r^2 = 8^2 + 6^2

r^2= 64 + 36

r^2 = 100

r = 10 cm

Now, we want to get a chord length which is 6 cm away from the circle center

let the half-portion that forms the right triangle be c

Using Pythagoras’ theorem;

10^2 = 6^2 + c^2

c^2 = 100-36

c^2 = 64

c = 8

The full

length of the chord is 2 * 8 = 16 cm

5 0
3 years ago
Peter drove 432 Mi over a period of 6 hours while his best friend Eric drove 360 miles over 5 hours who had the faster unit righ
Darina [25.2K]

Answer:

Both Peter and Eric had the same unit rate of 72mph.

Step-by-step explanation:

Peter:

432/6 = 72

72 miles per hour

Eric:

360/5 = 72

72 miles per hour

4 0
3 years ago
Solve the equation -6 = -9 - 3x for x
Xelga [282]

Answer:

-6= - 9 - 3x

3x = -9 + 6

3x = - 3

Therefore x = -1

3 0
3 years ago
Factor using the identity: a3 + b3 = (a + b)(a2 – ab + b2) 8z3 + 27
vivado [14]

Answer:  this is our required factor i.e.

8z^3+27=(2z+3)(4z^2-6z+9)

Explanation:

Since we have given that

8z^3+27

As we know the identity , which says that

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

So, we can use this here ,

8z^3+27=(2z)^3+3^3\\\\=(2z+3)((2z)^2-2z\times 3+3^2)\\\\=(2z+3)(4z^2-6z+9)

Hence this is our required factor i.e.

8z^3+27=(2z+3)(4z^2-6z+9)


7 0
3 years ago
Read 2 more answers
60 plus 18% ill give brainliest :)
aksik [14]

Answer:

70.8

Step-by-step explanation:

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8 0
3 years ago
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