Question

Me ayudan porfa son mis ultimos dos trabajos porfaaa

Answer 1

Respuesta:

17.

a) x = 49/100

b) x = 3/14

c) x = 13/10

d) x = 11/10

18.

a) x = 6

b) x = -4

c) x = -3

d) x = 0

e) x = 7

f) x = -7

Explicación paso a paso:

17 a) $\sqrt{x} = \frac{7}{10}$ Para resolver, pasamos la raíz en exponente 2

$x = (\frac{7}{10} )^{2}$ Calculamos el valor...

$x = \frac{49}{100}$ Y lo tenemos! Verificamoslo:

$\sqrt{\frac{49}{100} } = \frac{7}{10}$

$\frac{\sqrt{49}}{\sqrt{100}} = \frac{7}{10}$

$\frac{7}{10} = \frac{7}{10}$ ✔

17 b) $2x = \frac{3}{7}$ Hallamos la x...

$x = \frac{\frac{3}{7} }{2}$ Calculamos

$x = \frac{3}{14}$ Verificamos:

$2*\frac{3}{14} = \frac{3}{7}$

$\frac{6}{14} =\frac{3}{7}$

$\frac{3}{7} =\frac{3}{7}$ ✔

17 c) x - 1 = 0,3 Pasamos el 0,3 a fracción

$x - 1 = \frac{3}{10}$ Hallamos la x

$x = \frac{3}{10} + 1$ Resolvemos:

$x = \frac{3+10}{10}$

$x = \frac{13}{10}$ Verificamos:

$\frac{13}{10} -1 = 0,3$

$\frac{13}{10} -\frac{10}{10} = \frac{3}{10}$

$\frac{3}{10} =\frac{3}{10}$ ✔

17 d) $2x -2 = \frac{1}{5}$ Hallamos:

$2x = \frac{1}{5} +2}$ Calculamos:

$\frac{10x}{5} = \frac{1+10}{5}$

$10x = \frac{11*5}{5}$

$x = \frac{11}{10}$ Verificamos:

$2*\frac{11}{10} -2 = \frac{1}{5}$

$2*\frac{11}{10} -\frac{20}{10} = \frac{2}{10}$

$\frac{22}{10} -\frac{20}{10} = \frac{2}{10}$

$\frac{2}{10} = \frac{2}{10}$ ✔

18) Lo haré sin explicaciones

a) 4x-20+√36 = (-2)*(-5)

4x = 10+20-6

x = 24/4

x = 6

4*6-20+√36 = (-2)*(-5)

24-20+6 = 10

4+6 = 10

10 = 10 ✔

b) 2x + (-12) : (-2) = -2

2x = -2 - 6

x = -8/2

x = -4

2*(-4) + (-12) : (-2) = -2

(-8)+6 = -2

-2 = -2 ✔

c) -4x + √25 = 4² + 5⁰

-4x = 16+1-5

x = 12/-4

x = -3

-4*(-3) + √25 = 4² + 5⁰

12 + 5 = 16 + 1

17 = 17 ✔

d) -7x = 0

x = 0/-7

x = 0

-7*0 = 0

0 = 0 ✔

e) -7 + x = 0

x = 0 + 7

x = 7

-7 + 7 = 0

0 = 0 ✔

f) 7 + x = 0

x = 0 - 7

x = -7

7 + (-7) = 0

7 - 7 = 0

0 = 0 ✔