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8_murik_8 [283]
3 years ago
6

Help!!! Solve for variable and show steps

Mathematics
1 answer:
denis23 [38]3 years ago
7 0

Step-by-step explanation:

here,

\sqrt{x + 4}  - 3 = 1

\sqrt{x + 4}  = 1 + 3

\sqrt{x + 4}  = 4

x + 4 = (4) ^{2}

x + 4 = 16

<u>x</u><u>=</u><u>1</u><u>6</u><u>-</u><u>4</u>

<u>x</u><u>=</u><u>1</u><u>2</u>

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When a certain prescription drug is taken orally by an adult, the amount of the drug (in mg/L) in the bloodstream at t hours is
castortr0y [4]

Answer:

1. y = f(8)

2. So for t which f'(t) > 0, the drug level in the bloodstream is increasing. And for t which f'(t) < 0, it is decreasing.

Step-by-step explanation:

The concentration of the drug in the bloodstream at t hours is:

y = f(t)

1. What is the concentration of the drug in the bloodstream at t= 8 hours?

At t hours, y = f(t)

So at 8 hours, y = f(8)

2. During what time interval is the drug level in the bloodstream increasing? Decreasing?

A function f(t) is increasing when

f'(t) > 0

And is decreasing when

f'(t) < 0

So for t which f'(t) > 0, the drug level in the bloodstream is increasing. And for t which f'(t) < 0, it is decreasing.

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3 years ago
Write a compound inequality where A quantity x is at least 10 and at most 20
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<h3><u>20 ≥ x ≥ 10</u></h3>

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4 years ago
Marry has 13 cats if she sold 7 brown cats and sold 2 black cats then how many white cats are there in total
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<u>Step-by-step explanation</u>:

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  • Tristan can iron = 20 shirts per hour
  • Total work done by both = 490 shirts

Let 'x' be the number of hours Jeremiah ironed.

Let 'y' be the number of hours Tristan ironed.

x+y = 17   ------(1)

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Multiply (1) by 20 and subtract (2) from (1),

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