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Leona [35]
2 years ago
9

The population of a town is 13,000. It decreases at a rate of 5% per year. In about how many years will the population be less t

han 12,000?
Mathematics
1 answer:
Allushta [10]2 years ago
4 0

Answer:

2 years

Step-by-step explanation:

13000 X 0.05 = 650    

13000 - 650 = 12350     year 1

12350 X 0.05 =617.5

12350 - 617.5 =11732.5     year 2

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mr Goodwill [35]

Answer: 1. 26-12=14

2. 19-12=7

3. 17.50 divided by 7=2.5

Step-by-step explanation:

7 0
3 years ago
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If 75% of the students in Toby's grade voted, how many students are in Toby's grade?
kupik [55]

Answer:

HOW SHOULD WE KNOW WE DONT HAVE ANY INFORMATION EXCEPT 75% AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

Step-by-step explanation:

3 0
3 years ago
What is the value of x
Nezavi [6.7K]

\tan(16)  =  \frac{8.3}{x}  \\

0.2867453858 =  \frac{8.3}{x}  \\

Thus :

x =  \frac{8 .3}{0.2867453858}  \\

x = 28.9455398797

Thus :

x = 28.9

3 0
2 years ago
4n² +7n=0 what do I do if there is no part c?
Gnoma [55]

Answer:

  • Find the coefficients using ax^2 + bx + c = 0

a = 4

b = 7

c = 0

  • Make the coefficient equal 1. But how do we do that? Division.

4n² + 7n = 0

4/4n² + 7n/4 = 0/4

  • Simplify

= n² + 7/4n = 0

a = 1

b = 7/4

c = 0

  • Complete the square using b/2².

b = 7/4

(b/2)² = (7/4 ÷ 2)²

Use fraction rule.

7/4 ÷ 2² = 7/4² / 2²

<em>square the numbers</em>

7/4² / 2² = 49/16 ÷ 4

49/16 ÷ 4 = 49/16 × 1/4

49/16 × 1/4 = 49/64

Add to both sides of the equation using 49/64

b = 7/4

b/2 = 7/4 ÷ 2

<em>simplify</em>

b/2 = 7 ÷ (4 × 2)

<em>simplify(arithmetic)</em>

b/2 = 7/8

n² + 7/4n + 49/64 = 49/64

(n + 7/8)² = 49/64

  • Solve for the unknown x

(n+\frac{7}{8})^2=\frac{49}{64}\\\sqrt{(n+\frac{7}{8})^2}=\sqrt{\frac{49}{64}}\\

Next, cancel out the square on the left side.

n+\frac{7}{8}=+/-\sqrt{\frac{49}{64}}

Subtract 7/8 from both of the sides.

n+\frac{7}{8}-\frac{7}{8}=-\frac{7}{8}+/-\sqrt{\frac{49}{64}}

Simplify the left side.

n=-\frac{7}{8}+/-\sqrt{\frac{49}{64}}\\n=-\frac{7}{8}+/-\frac{\sqrt{49}}{\sqrt{64}}\\n=-\frac{7}{8}+/-\frac{7}{8}\\n_1=0\\n_2=-\frac{7}{4}

<em>That wraps it up for this equation. Hope it helped!</em>

3 0
1 year ago
A line passes through the points A(-1,7) and B(1,3)<br><br>find the slope​
steposvetlana [31]

Answer:

-2

Step-by-step explanation:

The slope of a line is given by

m = (y2-y1)/(x2-x1)

    = (3 - 7)/(1 - -1)

    = (3-7)/(1+1)

    = -4/2

   -2

8 0
3 years ago
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