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3 years ago

11

#38: The integers below represent the monthly gains and losses in the value of an investment over one year. Find the mean of the

integers: -$190, $75, -$65, $100, $72, -$54, -$62, -$87, $92, $81, -$73, $63

1 answer:

jek_recluse [69]3 years ago

8 0

It should be $84.50 because you have to add all the numbers up and divide it by how many numbers there are

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Calculate the area of rectangle if the area of the shaded triangle is 2.6cm

bagirrra123 [75]

Answer:

12

Step-by-step explanation:

3 0

3 years ago

Need help with math homework

Pavel [41]

Hello!

The answer for A is:

$X1=-1\\X2=5$

The answer for B is: The rocket will hit the lake surface in 5 seconds.

<h2>Why?</h2>

Defining the terms:

$a=-16\\b=64\\c=80\\$

So, replacing it in the quadratic equation (it's given to you in the exercise)\\

$x=\frac{-b+-\sqrt{b^{2}-4*a*c } }{2*a}$

$x=\frac{-64+-\sqrt{64^{2}-4*-16*80 } }{2*-16}$

$x=\frac{-64+-\sqrt{64^{2}+5120} }{-32}=\frac{-64+-\sqrt{4096+5120} }{-32}\\x=\frac{-64+-\sqrt{9216} }{-32}=\frac{-64+-\ 96 }{-32}\\x=\frac{-64+-\ 96 }{-32}\\x1=\frac{-64+\ 96 }{-32}=\frac{32}{-32} =-1\\\\x1=\frac{-64-\ 96 }{-32}=\frac{-160}{-32} =5\\$

We are working with a quadratic equation, so we will have two possible results,

$X1=-1\\X2=5\\$

Now, we are asked to find the time, time can not be a negative value, we have to discard X1 (-1) since it's a negative value, knowing that, the rocket will hit the lake after 5 seconds.

Have a nice day!

5 0

4 years ago

Pin this please answer my question i will make you a brainlist .....

cricket20 [7]

Answer:

10%

Step-by-step explanation:

<u>Given:</u>

Borrowed amount P = Rs 100000
Time t = 3 years
Number of compounds n = 3
Interest I = Rs 33100
Rate r = ?

<u>Use formula:</u>

I = P(1 + r)³ - P

<u>Substitute values and solve for r:</u>

33100 = 100000(1 + r)³ - 100000
133100 = 100000(1 + r)³
(1 + r)³ = 133100/100000
(1 + r)³ = 1.331
1 + r = ∛1.331
1 + r = 1.1
r = 0.1 or 10%

5 0

3 years ago

11. The table shows the lengths of fish caught by three,

blsea [12.9K]

Numbers can be ordered in ascending or descending order.

The length of fishes from greatest to least is

$Emily = 12 \frac 34$ .
$Emma = 12.7$ .
$Anne = 12 \frac 35$

Given

$Emma = 12.7$

$Anne = 12 \frac 35$

$Emily = 12 \frac 34$

Convert all fractions to decimals

$Emma = 12.7$

$Anne = 12.6$

$Emily = 12.75$

Arrange from greatest to least

$Emily = 12.75$

$Emma = 12.7$

$Anne = 12.6$

<em>Hence, the length of fishes from greatest to least is </em>

$Emily = 12 \frac 34$ $Emma = 12.7$ $Anne = 12 \frac 35$

Read more about order of numbers at:

brainly.com/question/3729546

6 0

3 years ago

Which ordered pair is a solution of the equation?<br> y = -3x-4.

geniusboy [140]

Answer:

B. Only (-3,5)

Step-by-step explanation:

1. Plug in the x values from the answer choices and see if it gives you the y-value in the answer choices.

A. y=-3(-2) - 4

= 6 - 4

y = 2

The ordered pair for answer A is (-2,4) where the y-value is 4. Well, when you plugged in -2 for x you got 2, not 4. So A can't be the right answer.

B. y=-3(-3) - 4

= 9- 4

y = 5

The y-value in this ordered pair (-3,5) is indeed 5, so this answer holds true.

Therefore, the answer is B because it is the only ordered pair that has the correct solution.

8 0

3 years ago