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vodomira [7]
3 years ago
15

Calculati : d. (3/1x4+ 3/4x7 + 3/7x10 + ...... + 3/97x100) + (1/20x21 + 1/ 21x22 + .... + 1/79x80)=

Mathematics
1 answer:
kakasveta [241]3 years ago
5 0

Hi there!

So, first you have to do all the multiplication and division, then the addition.

Steps:

1. (3/4 + 3/28 + 3/70 + 3/9700) + (1/420 + 1/462 + 1/6320)

2. (0.9003092784...) + (0.004703682394...)

3. Answer = 0.9050129608

Of course for the actual answer your teacher may wanted it rounded.

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A builder has an 5-acre plot divided into 1 2 -acre home sites. How many 1 2 -acre home sites are there? please answer soon
STALIN [3.7K]

Answer:

10

Step-by-step explanation:

5 divided by 1/2 is 10

3 0
3 years ago
An object is launched from the ground. The object’s height, in feet, can be described by the quadratic function h(t) = 80t – 16t
steposvetlana [31]
Would you like me to help walk you through this with you figuring out the work?
Or would you prefer just an answer in math form with me explaining it along the way?

<span>h(t) = 80t – 16t^2
When you are on the ground we have zero height, h(t) = 0. This is saying that at some amount of time we will call t, the object will hit the ground. Now we solve for t to get that time 
so we sub h(t) for 0.
0=80t-16t^2 move the -16t^2 to the other side
 16t^2=80t   divide both sides by t
16t=80   divide both sides by 16
t=5
Now... it is important to realize that there are going to be 2 answers to this equation as you have a t^2. The other answer is 0. Obviously, unless the object started on the ground, the time to hit the ground is not 0 and that answer is ruled out.



</span>
6 0
3 years ago
Read 2 more answers
What is the sum?
gavmur [86]

Answer:

The answer is option D.

Step-by-step explanation:

First we must first find the LCM

the LCM of x² - 9 and x + 3 is x² - 9

So we have

\frac{3}{ {x}^{2} - 9 }  +  \frac{5}{x + 3}  =   \frac{3 + 5(x - 3)}{ {x}^{2}  - 9}  \\  \\  =  \frac{3 + 5x - 15}{(x + 3)(x - 3)}    \\  \\  = \frac{5x - 12}{(x +  3)(x - 3)}

Hope this helps you

5 0
3 years ago
25−2(5+4x)
ExtremeBDS [4]

Step-by-step explanation:

25 - 2(5 + 4x)

= 25 - 10 - 8x (Distributive Property)

= 15 - 8x.

3 0
3 years ago
Find the mode(s) for the given sample data.
ryzh [129]

Answer:

4.9 & 4.2

Step-by-step explanation:

First, we will have to define mode,

 

“Mode is the most frequently occurring value of the given data.”

The value with the greatest frequency is called mode. In order to find mode, we have to skim through the data. The value which is repeated most is the mode of the given data. A data can have more than one modes.

For the above data,

4.9 is repeated 3 times.

4.2 is repeated 3 times.

These both numbers have highest frequency in the data.

So the modes are 4.9 and 4.2 ..  

4 0
4 years ago
Read 2 more answers
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