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3 years ago

Help ASAP! ill mark brainliest if correct

Mathematics

1 answer:

irina [24]3 years ago

5 0

Answer:

fourth option

Step-by-step explanation:

The mean is calculated as

mean = $\frac{sum}{count}$

= $\frac{15+16+21+23+25+25+25+39}{8}$

= $\frac{189}{8}$

= 23.6 ( to 1 dec. place )

The median is the middle value of the data set. If there is no exact middle then it is the average of the values either side of the middle.

15 16 21 23 25 25 25 39

↑ middle

median = $\frac{23+25}{2}$ = $\frac{48}{2}$ = 24

The mode is the value that occurs most often, that is 25

Thus

mean = 23.6 , median = 24 , mode = 25

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How do I solve this question

nika2105 [10]

Answer:

Step-by-step explanation:

Sum = -12

Product = -48

Factors = -12 , 4

-12 + 4 = - 8 & -12 * 4 = -48

x² - 8x - 48 = x² - 12x + 4x - 4*12

= x(x - 12) + 4(x - 12)

= (x - 12) (x + 4)

5 0

2 years ago

The product of two numbers is 24. One of the numbers is 10 units less than the other. The numbers are:

AleksandrR [38]

Answer:

E. -12 and -2

Step-by-step explanation:

-12 x -2 = 24

brainliest please

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2 years ago

Read 2 more answers

What is the ratio and percent of the rectangle below is shaded

kvv77 [185]

Answer:

choice C) 1:3 and 33 1/3%

Step-by-step explanation:

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3 years ago

Read 2 more answers

A building in a city has a rectangular base. the length of the base measures 65 ft less than twice the width. the perimeter of t

dybincka [34]

By solving a system of equations, we will see that the width is 170ft and the length 275 ft.

<h3>How to get the dimensions of the base?</h3>

For a rectangle of length x and width y, the perimeter is:

P = 2*(x + y).

Here we know that:

x = 2y - 65ft

p = 890ft = 2(x + y)

So we have a system of equations.

To solve this, we need to replace the first equation into the second one:

890ft = 2(x + y)

890ft = 2(( 2y - 65ft) + y)

Now we can solve this for y.

890ft = 4y - 130ft + 2y

890ft + 130ft = 6y

1020ft/6 = y = 170ft

So the width is 170ft, and we know that:

x = 2y - 65ft = 2*(170ft) - 65ft = 275ft

So the length is 275 ft.

If you want to learn more about systems of equations:

brainly.com/question/13729904

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5 0

1 year ago

Click the picture that I sent you

Digiron [165]

Answer: 1211.6585 years

<u>Step-by-step explanation:</u>

The equation for exponential growth is: $P=P_oe^{kt}$

P: final population
P₀: initial population
k: rate of decay (or growth)
t: time

Use the half life information to find k:

$\dfrac{1}{2}P_o=P_oe^{k(800)}\\\\\\\dfrac{1}{2}=e^{800k}\qquad \rightarrow \qquad \text{divided both sides by}\ P_o\\\\\\ln\bigg(\dfrac{1}{2}\bigg)=800k\qquad \rightarrow \qquad \text{applied ln to both sides}\\\\\\\dfrac{ln(\frac{1}{2})}{800}=k\qquad \rightarrow \qquad \text{divided both sides by 800}\\\\\\\large\boxed{-0.000867=k}$

Next, input the information (65% decayed = 35% remaining) and the k-value to find your answer.

$.35P_o=P_oe^{-0.000867t}\\\\\\.35=e^{-0.000867t}\\\\\\ln(.35)=-0.000867t\\\\\\\dfrac{ln(.35)}{-0.000867}=t\\\\\\\large\boxed{1211.6585=t}$

5 0

3 years ago