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Yuki888 [10]
3 years ago
12

Which number sentence is not true?A.|-4.5| = 4.5 B.|0| < |-45| C.|45| > 0 D.|4.5| > |-45|

Mathematics
2 answers:
dexar [7]3 years ago
8 0

Answer:

D

Step-by-step explanation:

Reminder that | x | = | - x | = x

A

| - 4.5 | = 4.5 ← True

B

| 0 | = 0 and | - 45 | = 45 ⇒ 0 < 45 ← True

C

| 45 | = 45 and 45 > 0 ← True

D

| 4.5 | = 4.5 and | - 45 | = 45 and 4.5 < 45 ← False


IRISSAK [1]3 years ago
6 0

Answer:

B.|0| < |-45|

Step-by-step explanation:

B is right because -45 is a negative and 0 isn't, 0 is bigger than -45. And A. C. and D. are all correct.

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The answer is D .....
7 0
3 years ago
Which of the following constants can be added to x^2+2/3 to form a perfect square trinomial?
Lera25 [3.4K]

As your question is stated, there is no answer!


I'm going to assume the polynomial you meant is:


x^2 + \frac{2}{3} x


To create a perfect square trinomial, take half the coefficient of x and then square it.


\left( \frac{1}{2} \times \frac{2}{3} \right) ^2 = \left(\frac{1}{3} \right) ^2 =\frac{1}{9}


In all problems like this, you want to square half the coefficient of x -- always half.

4 0
3 years ago
Simplify 5p2 over 5p3
castortr0y [4]

Answer:

1/p^1

Step-by-step explanation:

5p^2/5p^3

  1. cancel the fives
  • p^2/p^3

2. subtract denominator exponent from numerator exponent

  • p^-1
  • (you can't have negative exponents so you have to move the negative exponent coefficient to the denominator to make it possitive)

3. 1/p^1

4 0
3 years ago
Solve the linear system if 3x+4y-z=-6 5x+8y+2z=2. -x+y+z=0
Anni [7]
We are given with three equations and three unknowns and we need to solve this problem. The solution is shown below:
Three equations are below:
3x + 4y - z = -6
5x + 8y + 2z = 2
-x + y + z = 0

use the first (multiply by +2) and use the second equation:
2 (3x+4y -z = -6)  => 6x + 8y -2z = -12
                               + ( 5x + 8y +2z = 2)
                                  ------------------------
                                     11x + 16y = -10  -> this the fourth equation

use the first and third equation:
 3x + 4y -z = -6
+ (-x + y + z =0)
-------------------------
        2x + 5y = -6 -> this is the fifth equaiton

use fourth (multiply by 2) and use fifth (multiply by -11) equations such as:
2 (11x + 16y = -10)   => 22x + 32y = -20  -> this is the sixth equation
-11 (2x + 5y = -6)    => -22x -55y = 46   -> this is the seventh equation

add 6th and 7th equation such as:
   22x + 32y = -20
+(-22x - 55y = 66)
---------------------------
             - 23y = 46
               <span>   y = -2

solving for x, we have:
</span>2x + 5y = -6 
2x = -6 - 5y
2x = -6 - (5*(-2))
2x = -6 +10
2x = 4
x=2

solving for y value, we have:
-x + y + z =0
z = x -y 
z = 2- (-2)
z =4

The answers are the following:
x = 2
y = -2
z = 4
5 0
4 years ago
Which is a factor of 24x2 − 44x + 12?<br> 3<br> 3x + 3<br> 3x − 2<br> 2x − 3
Kipish [7]
24x²-44x+12 = 4(2x-3)(3x-1)

<span>2x − 3 </span>
7 0
3 years ago
Read 2 more answers
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