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sweet-ann [11.9K]
3 years ago
8

Solve for x in the equation 3x2-18+5=47

Mathematics
1 answer:
Airida [17]3 years ago
7 0
3x^2-18+5=47
3x^2 = 60
x^2 = 20
x = 4.472 , x = - 4.472
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A city has a population of 14000. The population is 27000 after 10 years.
pogonyaev

Answer:

Umm... the population increased

Step-by-step explanation:

what is the question though.. .I mean what are we supposed to answer but The population increased 13000 after 10 years. hope that is what it you're asking for the answer and hope that helps ( :

6 0
3 years ago
How do I write x - y = 11 in slope-intercept form?
belka [17]

Answer:

y = x - 11

Step-by-step explanation:

Slope-intercept form:  y = mx + b

<u>Step 1:  Subtract x from both sides</u>

x - y - x = 11 - x

-y = 11 - x

<u>Step 2:  Multiply both sides by -1</u>

-y * -1 = (11 - x) * -1

<em>y = x - 11</em>

<em />

Answer:  y = x - 11

7 0
4 years ago
Read 2 more answers
When the solution of x2 − 9x − 6 is expressed as 9 plus or minus the square root of r, all over 2, what is the value of r? x equ
jarptica [38.1K]

Answer:

r = 105

Step-by-step explanation:

Given quadratic equation:

x² − 9x − 6

Quadratic formula is given by:

(-b ± √b² - 4ac) ÷ 2a

For the equation: x² - 9x - 6

a = 1, b = -9 and c = -6

Substitute in the quadratic formula:

(-b ± √b² - 4ac) ÷ 2a

(-(-9) ± √(-9)² - 4(1*-6)) ÷ 2*1

= 9 ± √105 / 2

The solution of x² − 9x − 6 is expressed as 9 plus or minus the square root of r, all over 2

Therefore, the value of r is 105

4 0
3 years ago
What is the answer to 13 in precise detail?
lyudmila [28]

Well, I don't know.  Let's see . . . . .

First draw: One 'M' available out of 11 letters.   Probability of picking it = 1/11.
2nd draw:  Four 'I's available out of 10 letters.  Probability of picking one = 4/10.
3rd draw:  Four 'S's available out of 9 letters.   Probability of picking one = 4/9.
4th draw:  Three 'S's available out of 8 letters. Probability of picking one = 3/8.
5th draw:  Three 'I's available out of 7 letters.  Probability of picking one = 3/7.
6th draw:  Two 'S's available out of 6 letters.   Probability of picking one = 2/6.
7th draw:  One 'S' available out of 5 letters.     Probability of picking it = 1/5.
8th draw:  Two 'I's available out of 4 letters.     Probability of picking it = 2/4.
9th draw:  Two 'P's available out of 3 letters.   Probability of picking one = 2/3.
10th draw: One 'P' available out of 2 letters.   Probability of picking it = 1/2.
11th draw: One letter left.  It is an 'I'.  Probability of picking it = 1 .

Probability of all of those draws in order =

    (1/11) x (4/10) x (4/9) x (3/8) x (3/7) x (2/6) x (1/5) x (2/4) x (2/3) x (1/2) x (1) =

           1,152 / 39,916,800 =

                 1 / 34,650 =

                                     0.00002886 =

                                   <em>  0.002886 percent</em> (rounded)

Not a good bet.  (But better than the lottery.)


7 0
4 years ago
Eduardo is building a sandbox that has an area of 84 square feet. What are the possible whole number measurements for the length
kicyunya [14]
Try this option:
1. note, that the number 84 is divided by numbers: 1;2;3;4;6;7;12;14;21;28;42 and 84. It means, that measurements of the length may be: 1;2;3;4;6;7;12;14;21;28;42;84 and for the width: 84;42;28;21;14;12;7;6;4;3;2;1.
2. according the numbers calculated in item 1, the possible number measurements for the length and width of the sandbox are (length; width):
1;84
2;42
3;28
4;21
6;14
7;12
12;7
14;6
21;4
28;3
42;2
84;1
4 0
4 years ago
Read 2 more answers
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