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nevsk [136]
4 years ago
9

3x^2 - 4x + 7 (Find the domain of the expression)

Mathematics
1 answer:
Jobisdone [24]4 years ago
3 0
<span><span><span><span>x1</span> </span><span>= <span><span>−(−4) − √<span> (−4)2 − 4×3×7 </span> </span>2×3</span> </span><span>= <span><span>4 − 2 × √ 17 i </span>6</span> </span><span>≈ 0.666667 − 1.374369i</span></span><span><span><span>x2</span> </span><span>= <span><span>−(−4) + √<span> (−4)2 − 4×3×7 </span> </span>2×3</span> </span><span>= <span><span>4 + 2 × √ 17 i </span>6</span> </span><span>≈ <span>0.666667 + 1.374369i</span></span></span></span>
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A museum charges $10
Tanzania [10]

A piecewise function is a function that behaves differently in different intervals of its domain.

The piecewise function is:

  • f(x) = $10   if  0 < x < 6
  • f(x) = $15   if  6 ≤ x  ≤ 18
  • f(x) = $20  if 18 < x

<em />

<em>Here the given information for the function is:</em>

  1. The museum charges $10 for kids of 5 and under
  2. The museum charges $15 for ages of 6 to 18
  3. The museum charges $20 for ages larger than 18.

Then if we define x as the age of the person, the function f(x) that tells the <u>cost of the ticket will be:</u>

  • f(x) = $10   if  0 < x < 6
  • f(x) = $15   if  6 ≤ x  ≤ 18
  • f(x) = $20  if 18 < x

So as you can see, depending on the value of x and in which interval it belongs, the function behaves differently.

If you want to learn more, you can read:

brainly.com/question/12561612

5 0
3 years ago
Which situation about Sam's money could be described using the sum of -2.5 and -10?
satela [25.4K]

Answer

C. Sam owes his dad $7.50

Step-by-step explanation:

because none are correct but tat is te closetes one

6 0
3 years ago
Your bank is offering a savings account with a nominal rate of 1.5%, compounded continuously. If you deposit $1,000 in 2010, wha
Anastaziya [24]

Answer:

$1,161.83

1.51%

Step-by-step explanation:

Continuously compounded interest is:

A = Pe^(rt)

where A is the final amount,

P is the initial amount,

r is the rate per time,

and t is time.

Given P = 1000, r = 0.015, and t = 10:

A = 1000e^(0.015 × 10)

A = 1000e^(0.15)

A = 1161.83

The effective annual yield is the annually compounded rate needed to have the same yield after the same time.  For continuously compounded interest, he equation for effective annual yield is:

R = -1 + e^r

R = -1 + e^0.015

R = 0.0151

The effective annual yield is 1.51%.

7 0
4 years ago
I need too know what is 8×25×23?
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The answer to your question is 4600.
6 0
3 years ago
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Lindsey is tracking the progress of her plant’s growth. Today the plan is 5cm high. The plant grows 1.5 cm per day. What will th
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31.5 cm . multiply 20 times 5 then added the 1.5 cm

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