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Zepler [3.9K]
3 years ago
6

Can someone help me on what is 2(4x+5)

Mathematics
2 answers:
Ber [7]3 years ago
8 0

2(4x+5)

Distribute 2 to 4x and 5.

8x+10

This can't be simplified/solved any further without any more information.

I hope this helps :)


ankoles [38]3 years ago
3 0
Ok....
Multiply 2 time 4x and 2 times 5
You should then have 8x plus 5
It's the distributive property
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from the edge of a 486-foot cliff, peyton shot an arrow over the ocean with an initial upward velocity of 90-feet per second
anygoal [31]

Answer:

9 seconds

Step-by-step explanation:

The complete question is

The altitude of an object, d, can be modeled using the equation below:

d=-16t^2 +vt+h

from the edge of a 486 foot cliff, Peyton shot an arrow over the ocean with an initial upward velocity of 90 feet per second. In how many seconds will the arrow reach the water below?

Let

d ----> the altitude of an object in feet

t ---> the time in seconds

v ---> initial velocity in ft per second

h ---> initial height of an object in feet

we have

d=-16t^2 +vt+h

we  know that

When the arrow reach the water the value of d is equal to zero

we have

v=90\ ft/sec

h=486\ ft

d=0\ ft

substitute the values and solve for t

0=-16t^2 +(90)t+486

-16t^2+90t+486=0

Multiply by -1 both sides

16t^2-90t-486=0

The formula to solve a quadratic equation of the form ax^{2} +bx+c=0 is equal to

x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}

in this problem we have

a=16\\b=-90\\c=-486

substitute in the formula

t=\frac{90(+/-)\sqrt{-90^{2}-4(16)(-486)}}{2(16)}

t=\frac{90(+/-)\sqrt{39,204}}{32}

t=\frac{90(+/-)198}{32}

t_1=\frac{90(+)198}{32}=9\ sec

t_2=\frac{90(-)198}{32}=-3.375\ sec

the solution is t=9 sec

see the attached figure to better understand the problem

4 0
3 years ago
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Answer:

Non of the above

I

f(x) = 4x - 1 \\ f(1) = 4 - 1 \\ f(1) = 3

II

f(x) = 3x -  \frac{1}{4}  \\  {f}^{ - 1} (x) =  \frac{1}{3x}  +  \frac{1}{12}  \\   {f}^{ - 1} (2) =  \frac{1}{6}  +  \frac{1}{12}  \\  {f}^{ - 1} (2) =  \frac{1}{4}

III

2y + 8 = 4y - 2 \\  - 2y =  - 10 \\ y = 5

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110 and 294 are the outliers because their difference in value from other data is large.

<h3>What are outliers?</h3>
  • An outlier is an observation that lies an abnormal distance from other values in a random sample from a population.

<h3>sample of data</h3>

Given the sample data 110, 196, 197, 199, 205, 208, 209, 210, 210, 294, we need to get the outliers that are an observation that lies an abnormal distance.

From the data, we can see clearly that 110 and 294 are the outliers. Their difference in value from other data is large.

Learn more on outliers here: brainly.com/question/2749543

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