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fredd [130]
2 years ago
7

Write an expression for: half a number decreased by 12.

Mathematics
1 answer:
Gennadij [26K]2 years ago
5 0

Answer:

x/2 - 12

Step-by-step explanation:

let the number be x

half a number means x divide by 2. i.e x/2

when decreased by 12 means x/2 - 12

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Factor. x^2 - 11x + 30 delta math
4vir4ik [10]

Answer:

(x-5)(x-6)

Step-by-step explanation:

-6-5=-11

-6 times -5=30

so...

(x-5)(x-6) and -5 and -6 are the factors.

4 0
3 years ago
A magazine contains 80 pages of advertisements. This represents 64% of the total pages in the magazine. How many total pages are
dimaraw [331]

Answer:

125 pages

Step-by-step explanation:

Since 80 is 64% of unknown x we can write the equation 80/x=64/100. Now cross multiply to get 8000=64x. Divide both sides by 64 to get 125=x.

6 0
3 years ago
According to Descartes's rule of sign, how many possible positive and negative roots are there for the equation
damaskus [11]
<h2>Descartes Rule of Sign</h2><h3>Answer:</h3>

There are 3 Real Roots for the Equation

<h3>Step-by-step explanation:</h3>

According to Descartes Rule of Sign, The maximum number of real roots a polynomial equation has is the number of times the sign of term changes from a higher power term to a lower power term.

In the given equation, 0=-4x^6-3x^5+2x^2-4x+1, we can already see that from \red -4x^6 to \red -3x^5 we can see that the sign didn't change so there might be no real roots. From \red -3x^5 to \blue +2x^2, we can see that the signs change so we now know that there might be 1 real root for equation. From \blue +2x^2 to \red -4x, the signs changed so there might be 2 real roots. From \red -4x to \blue +1, it changed again so there might be 3 real roots. There are no other term with lesser power to compare for \blue +1 so we are left with 3 real roots.

7 0
3 years ago
Read 2 more answers
If K is the midpoint of JL , JK = MN, LM = 3JK and JN = 78, find LN
borishaifa [10]
A. 42

JN, which is the whole line, equals 78. We learned that JK, KL, and MN are all equal, and that LM equals three points.

So, there are 6 parts to the line in total. Dividing 78 by 6 gives you 13 for a sixth of the line.

Now, to find LN all you have to do is know that LM is 13 times three. And just add one more 13 from MN.

13 x 4 = 42 as your answer. I hope you were able to follow my explanation lol
6 0
3 years ago
What is 122 / 600?<br><img src="https://tex.z-dn.net/?f=122%20%5Cdiv%20600" id="TexFormula1" title="122 \div 600" alt="122 \div
kipiarov [429]
The answer : 0.20333333333
5 0
2 years ago
Read 2 more answers
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