If x is a real number such that $x^3 = 729$ , then $x^2+√(x)$ equals?

Answers

Answer 1

Answer: $x^3 = 729 \n \n x^2+√(x) =? \n \n x^3 - 729=0 \n \n x^3-9^3 = 0\n \n(x-9)(x^2+9x+81)=0$

$x^2+9x+81 =0 \ \ or \ \ x-9 = 0\n \n\Delta =b^2-4ac =9^2-4\cdot 1\cdot 81=81- 324 =-243 \n \n and \ we \ know \ when \ \Delta \ is \ negative, \ theres \ no \ solution \n or \n x-9=0 \n \nx=9$

$a^3-b^3=(a-b)(a^2+ab+b^2) \n\n \n x^2+√(x) = 9^2+√(9)=81+3 = 84$

Answer 2

Answer: First, we find the value of 'x.'
$x^(3)=729 \n x= \sqrt[3]{729}$
x=9

$x^(2) + √(x)$
$9^(2)$ + $√(9)$
81+3
= 84
$x^(2) + √(x)$ =84

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A florist sells two dozen roses for $50.88. At this rate what's the cost per rose? A. $25.44 B. $0.12 C. $2.12 D. $21.20

Answers

1 dozen = 12
2 dozen = 24

24 roses for $50.88

$(50.88)/(24)$ = $2.12

1 rose = $2.12

Answer is: C. $2.12

C.2.12 two dozen is 24 cause a dozen is 12 so add 2.12 24 times or multiply then you will get $50.88

The exterior angles of a quadrilateral have measures of 72°, 58°, 2xº, and 3xº. Find the value of x.x=

Answers

Answer:

Step-by-step explanation:

72 + 58 + 2x + 3x = 360

5x = 230

x = 46

When making a statistical inference about the mean of normally distributed population based on the samples drawn from the population which of the following statements is correct all else being equalEight. The 68% confidence interval is wider than the 90% confidence interval.
B.The 90% confidence interval is narrower than the 95% confidence interval.
C. The 90% confidence interval is wider than the 99% confidence interval.
D.The 99% confidence interval is narrower than the 68% confidence interval.

Answers

When making a statistical inference about the mean of normallydistributed population based on the samples drawn from the population the statement that is true and correct all else being equal is (option C)

What is stated in option C?

Option C indicates that the 90% confidence interval is wider than the 99% confidence interval.

Other qualities of a Normally Distributed Population are:

they are symmetric
They are unimodal
They are asymptotic
The mean, median and mode are all equal.

Learn more bout Normally Distribution Population at;
brainly.com/question/15123330
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If T(n) = 2n + 3, what is the 3rd term? Please explain how you got the answer.I would really appreciate it!

Answers

T(n)=2n+3
it is easy :) you should just plug in 3 to the n and it is the answer :)

T(3)=2×3+3
=9 IT IS THE ANSWER
hope you understand it!

$T(3)=2\cdot3+3=6+3=9$

Mr. Chong deposits RM5 000 into a fixed deposit account with 4% interest rate compounded every 3 months for a period of 3 years. Calculate the amount of interest accrued after the third year。 fast please tq

Answers

Answer:

The interest is 634.13.

Step-by-step explanation:

Amount deposit , P = 5000

Interest, R = 4 % so, R = 4/4 = 1 %

Time, T = 3 years quarterly

n = 3 x 4 = 12

Let the amount is A.

Use the formula of the compound interest

$A = P \left ( 1 + (R)/(100) \right )^n\n\nA = 5000 \left ( 1 + (1)/(100) \right )^(12)\n\nA = 5634.13$

So, the interest is

I = A - P = 5634.13 - 5000 = 634.13

Reasonableness use the clues to solve the riddle. I am between 24 and 34. you say my name when you count by twos from zero. You say my name when you count by fives from zero. What number am I?