Find the sum of the first 39 terms of the following series, to the nearest integer. 2 , 7 , 12 , . . .

Mathematics

2 answers:

hammer [34]2 years ago

7 0

Answer:

3783

Step-by-step explanation:

kodGreya [7K]2 years ago

3 0

Answer:

let'ssssssssss gooooooooooooooooooooooooooooooooooooooooooooooooo

Step-by-step explanation:

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A pilot can travel for 140 miles with the wind in the same amount of time as 360 miles against the wind. Find the speed of the w

quester [9]

Answer:

-88 mph

Step-by-step explanation:

We can use the relation ...

time = distance/speed

to compare the times in the two directions.

$\dfrac{140}{200+w}=\dfrac{360}{200-w}\\\\140(200-w)=360(200+w)\\\\200(140-360)=w(360+140)\\\\w=\dfrac{200(-220)}{500}=-88 \quad\text{miles per hour}$

The wind speed is -88 miles per hour.

_____

The problem statement tells us the travel is slower <em>with</em> the wind than <em>against</em> the wind. Hence "with the wind" must be subtracting from the net speed. That is, the wind speed is negative.

4 0

2 years ago

Write 1.4 over 7 in simplest form

Nana76 [90]

2/10 because 0.7/7 is equal to one tenth, so 1.4/7 is equal to 2/10

7 0

2 years ago

Pyramid A is a square pyramid with a base side length of 14 inches and a height of 6 inches. Pyramid B has a volume of 3,136 cub

leonid [27]

The Volume of PYRAMID A is 8 times greater than the Volume of PYRAMID B as obtained by taking the ratio of the volume of both pyramids.

Volume of a square based pyramid is given as :

$V = a^2h/3$