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Vladimir [108]
2 years ago
13

Placement Assessment

Mathematics
1 answer:
garik1379 [7]2 years ago
4 0

Answer:

7 469.8.56

nossa nem sei como é bom saber se fala com a mãe e o pai do mundo e vc não tem mais nada pra comer e não tem como fazer a gente vai ficar muito tempo sem fazer a mãe dela não e vc como tá o trabalho rede de nada em casa e é só pra mim né não é fácil de fazer a mãe dela e a mãe dele tá bem né não é fácil de fazer o que vc quer que Deus quiser vai dar pra mim né e não tem como fazer d id da x não vou poder é o que eu te abençoe e ilumine e ilumine todos os dias entre?01029)

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How to solve X^4-19x^2+48=0
ZanzabumX [31]
Two numbers that add up to -19 and multiply to 48 are -16 and -3:

(x^4-19x^2+48)=0\\(x^2-16)(x^2-3)=0\\(x+4)(x-4)(x^2-3)=0

So, the solutions come from each parentheses:  x+4=0, x-4=0, and x^2-3=0.

x+4=0
x = -4

x-4=0
x = 4

x^2-3=0
x^2 = 3
x = +/- √3

So, the solutions are -4, -√3, √3, and 4.
4 0
3 years ago
For what value of x do the expressions 2/3x + 2 and 4/3x -6 have the same value
Masteriza [31]
<h2>The value of x = - \dfrac{10}{3}</h2>

Step-by-step explanation:

The given expressiona are:

\dfrac{2}{3x+2} and \dfrac{4}{3x-6}

To find, the value of x = ?

∴  \dfrac{2}{3x+2}=\dfrac{4}{3x-6}

By crossmultiplication, we get

4(3x + 2) = 2(3x - 6)

⇒ 12x + 8 = 6x - 12

⇒ 12x - 6x =  - 12 - 8

⇒ 6x = - 20

⇒ 3x = - 10

⇒ x = - \dfrac{10}{3}

∴ The value of x = - \dfrac{10}{3}

Thus, the value of x is equal to - \dfrac{10}{3}.

5 0
4 years ago
A number of two digits is six times the sum of its digits and if 9 is subtracted from it,its digits will be reversed
OLEGan [10]

Answer:

The number is 54

Step-by-step explanation:

4 0
3 years ago
For which equation is 3 a solution(I need help)
sineoko [7]

Answer:

B

Step-by-step explanation:

I did it on paper

6 0
3 years ago
750 is 150 percent of what?
Salsk061 [2.6K]

Answer:

500

Step-by-step explanation:

you welcome!! can  have brainliest?

5 0
3 years ago
Read 2 more answers
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