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4 years ago

Perform the indicated operation. (6x^2 + 4x -12) - (3x^2 + 9x -8)

1 answer:

Studentka2010 [4]4 years ago

4 0

Combine Like Terms - same variables with same exponent

6x² - 3x² = 3x²

4x - 9x = - 5x

-12 - -8 = -4

ANSWER: 3x² - 5x - 4

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¿En cuál de los siguientes intervalos están solo los números reales que pertenecen a ] –3 , 5 ] y no pertenecen a [ –1 , 7 [?

vitfil [10]

Complete question:

¿En cuál de los siguientes intervalos están solo los números reales que pertenecen a ]- 3,5 ] y no pertenecen a [ –1 , 7 [ ?

A) ]-3, -1[

B) ]- 3, -1 ]

C) [-1,5]

D) ]- 3,7[

E) [5,7[

Answer:

A) ]-3, -1[

Step-by-step explanation:

El intervalo ]- 3,5 ] incluye a todos los números que se encuentran entre -3 y 5. Es decir,

...-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6...

El intervalo [–1 , 7[ excluye a los números que se encuentran entre -1 y 7, pero incluye a todos los números que sean menores a -1 y a todos los mayores a 7. Es decir,

...-7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12 13...

Para responder el problema, debemos encontrar aquellos números reales que se incluyan dentro de ambos intervalos. Esto es,

]- 3,5 ] ...-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10...

]- ∞ , -1[ ∪ [7,∞[...-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10...

Es decir que el intervalo ]-3, -1[, corresponde a la intersección entre ambos conjuntos.

8 0

3 years ago

Someone help me please

Julli [10]

JCL because

JCL + LCT = 90

If you notice there is a right angle symbol

4 0

4 years ago

Read 2 more answers

Mean, Median, Mode And Range What Do You Do For Each Of These

Umnica [9.8K]

Mean, Median: Is the middle number of the ordered data or the mean of the middle two numbers

Mode: The number or numbers that occur most often

Rage: The difference between the lowest and highest values

Example:

5, 6, 6, 9, 11, 13, 13, 13, 24, 28, 33, 48

Median and Mean: 13
Because is the middle number

Mode: 13
Because is the number that repeats more often

Rage: 43
Because 48 the highest number minus 5 the lowest number equals 43
48-5=43

7 0

3 years ago

Read 2 more answers

PLEASE PLEASE PLEASE PLEASE SHOW YOUR WORK

stellarik [79]

Answer:

9.11x10^-28

Step-by-step explanation:

1.67x10^-24 would be .000000000000000000000000167 and 9.11x10^-28 would be .0000000000000000000000000000911 and because it has more zeros in front of it, 9.11x10^-28 would be the smaller mass

I'm 99.99999999999999999% sure this is correct.

6 0

4 years ago

Kirk has 12 dollars less than jim. If jim spends half of his money and kirk spends none,then kirk will have two dollars more tha

skelet666 [1.2K]

Answer:

Jim had $28

Kirk had $16

Step-by-step explanation:

Let

the amount of dollars Kirk has be "k"

and

the amount of dollars Jim has be "j"

Kirk has 12 dolalrs LESS THAN Jim, so we can write:

j = k + 12

Jim spends half & kirk spends none, so:

Jim has:

(k+12)(1/2) = (1/2)k + 12(1/2) = (1/2)k + 6

Kirk still has:

This will make Kirk's amount(k) be 2 dollar MORE THAN JIM'S AMOUNT (1/2k + 6). So we can write:

k = 2 + (1/2)k + 6

Now we can solve this for k:

$k=2+\frac{1}{2}k+6\\k-\frac{1}{2}k=6+2\\\frac{1}{2}k=8\\k=16$

And now, finding jim's amount:

j = k + 12

j = 16 + 12

j = 28

Initially,

Jim had $28

Kirk had $16

8 0

3 years ago