3 years ago

What is A decreased by 20% and then increased by 20% of that? Please show your work.

Mathematics

1 answer:

umka21 [38]3 years ago

8 0

$Answer: \\ A - 20\%A = A - 0.2A = 0.8A \\ 0.8A + 20\%0.8A = 0.8A + 0.2 \times 0.8A = 0.8 + 0.16A = 0.96A$

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En un trabajo manual de una escuela secundaria se necesitan pedazos alambron de 10,12,16,20 cm de largo, sin que sobre ni falte

zhenek [66]

Hola! No se si buscaste antes por aquí pero ya hay una respuesta anterior a esta pregunta y es la opción D

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2 years ago

Find the roots of the quadratic equation w+w²/3=0

Daniel [21]

I assume that the equation you mean is below:

$\large \boxed{w + \frac{ {w}^{2} }{3} = 0}$

To find roots for this equation, we have to get rid of the denominator. We can do by multiplying both sides by 3.

$\large{w(3) + \frac{ {w}^{2} }{3} (3) = 0(3)} \\ \large{3w + {w}^{2} = 0}$

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Answer

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2 years ago

The difference of a number times 2 and 7 is 9. (Use w for the unknown number)

asambeis [7]

2w-7=9
+7=+7
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w=8

7 0

2 years ago

Can y’all help me out with this

labwork [276]

$(a) P= \frac{A}{e^{rt}} 

(b) e^{rt}= \frac{A}{P} 

ln e^{rt}= ln(\frac{A}{P}), 
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3 years ago

What do I do for this question

padilas [110]

Answer:

Step-by-step explanation:

a + 9 = 15

a = 15 - 9

a = 6

c + 9 = 16

c = 16 - 9

c = 7

d = c + 9

= 7 + 9

= 16

e = d + 15

= 16 + 15

e = 31

P(selecting a boy) = total boy /total pupils = 16/31

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2 years ago