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2 years ago

13

A number plus 16 times its reciprocal equals 4. Find all possible values for the number.(My question was not answered correctly

for this time I earnestly beg for someone to give the steps and a proper answer.)

1 answer:

Gwar [14]2 years ago

6 0

Answer:

-8±√17 and -8±6√2

Step-by-step explanation:

1. x+16/x=4, x^2+16-4x=0. x=-8±√17

2. x+16/x=8, x^2+16-8=0. x=-8±6√2

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3 years ago

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Write an equation that describes the function

kozerog [31]

Answer:

Answer D

Step-by-step explanation:

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3 years ago

The approximate molar concentration of several chemicals are given. Find the pH of each use the calculator and round to the near

mojhsa [17]

Answer:

$pH = 13$ --- Oven Cleaner

$pH = 6.2$ --- Water

$pH =7.4$ --- Blood

$pH = 2.2$ --- Vinegar

Step-by-step explanation:

The given molar concentration are:[Missing from the question]

Oven Cleaner: [h+] = $10^{-13}$

Water: [h+] = $0.0000007$

Blood: [h+] = $0.00000004$

Vinegar: [h+] = $0.0063$

Required

Determine the pH

pH is calculated using:

$pH = -\log(h+)$

So, we have:

Oven Cleaner:

$pH = -\log(10^{-13})$

Using a calculator, we have:

$pH = 13$

Water:

$pH = -\log(0.0000007)$

Using a calculator, we have:

$pH = -1*-6.2$

$pH = 6.2$

Blood:

$pH = -\log(0.00000004)$

Using a calculator, we have:

$pH = -1 * -7.4$

$pH =7.4$

Vinegar:

$pH = -\log(0.0063 )$

Using a calculator, we have:

$pH = -1 * -2.2$

$pH = 2.2$

4 0

3 years ago

Simplify the expression:<br> 8a + 9(7 + 10a)

Irina18 [472]

Answer:

8a+9(7+10a)

8a+63+90a

8a+90a+63

98a+63.

Thank you.

BY GERALD GREAT.

3 0

2 years ago