3 years ago

Look at the question below.

Mathematics

1 answer:

AnnyKZ [126]3 years ago

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Find the sum of the 1st 100 terms: 100+98+96+...... 50 100 -98 1000

Mice21 [21]

Answer:

100

Step-by-step explanation:

Given :

Terms ( n ) = 100

First term ( a ) = 100

Series = > 100 + 98 + 96 .......

Common difference ( d ) = 98 - 100 = > - 2

We know sum formula:

S_n = ( n / 2 ) ( 2 a + ( n - 1 ) d )

= > S_100 = ( 100 / 2 ) ( 200 + ( 100 - 1 ) - 2 )

= > S_100 = 50 ( 200 - 198 )

= > S_100 = 50 ( 2 )

= > S_100 = 100

Therefore, sum of first 100 terms is 100.

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3 years ago

Whats the geometric mean of 6 and 9

Evgesh-ka [11]

Answer:

7.3485

Step-by-step explanation:

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3 years ago

Elena went to a store where you can scoop your own popcorn and buy as much as you want. She bought 10 ounces of spicy popcorn fo

kumpel [21]

Answer:

Step-by-step explanation:

$2.50 → 10 ounces

$1.00 → (10/2.50 x 1.00) ounces = 4 ounces

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3 years ago

Evaluate 5/8-(1/4)2=

ValentinkaMS [17]

Answer:

0.125

Step-by-step explanation:

(5 divided by 8) - ((1 divided by 4) x 2) = 0.125

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4 years ago

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Given the points below find XY. Round to the nearest hundred. X(-9,2) Y(5,-4)

posledela

$\bf ~~~~~~~~~~~~\textit{distance between 2 points} \\\\ X(\stackrel{x_1}{-9}~,~\stackrel{y_1}{2})\qquad Y(\stackrel{x_2}{5}~,~\stackrel{y_2}{-4})\qquad \qquad d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2} \\\\\\ XY=\sqrt{[5-(-9)]^2+[-4-2]^2}\implies XY=\sqrt{(5+9)^2+(-4-2)^2} \\\\\\ XY=\sqrt{14^2+(-6)^2}\implies XY=\sqrt{232}\implies XY\approx 15.23$

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3 years ago

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