What is the average of the first 99 counting numbers?

2 answers:

8 0

That's the only way possible, here 1 sec lemme look it up to see if their is any other way... I know their is I just don't remember it... Lol

andrew-mc [135]3 years ago

4 0

50 Because 
The average of 1 and 99 is 50
The average of 2 and 98 is 50
...
The average of 49 and 51 is 50
The average of 50 is 50

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Find the surface area of a right triangle prism with legs measuring 3 and 4 and a height of 10.

Hunter-Best [27]

Since we have a rectangle triangle, then we can find the other side of the triangle using the Pythagorean theorem.
We have then:
$L = \sqrt{3^2+4^2}$
$L = \sqrt{9+16}$
$L = \sqrt{25}$
$L = 5$
Then the surface area is given by the sum of the areas.
Triangle of the base and the top:
$A1 = (1/2) * (4) * (3)

A1 = 6$
Rectangle 1:
$A2 = (3) * (10)

A2 = 30$
Rectangle 2:
$A3 = (4) * (10)

A3 = 40$
Rectangle 3:
$A4 = (5) * (10)

A4 = 50$
Finally, the surface area is:
$A = 2A1 + A2 + A3 + A4
$
Substituting values:
$A = 2 * (6) + 30 + 40 + 50

A = 132$
Answer:
The surface area of a right triangle prism is:
B. 132

6 0

3 years ago

What number makes the expressions equivalent? 1/2(-1.4m +0.4)=?m+0.2

ch4aika [34]

Answer:

2/4 6/12 4/8 5/10

4 0

3 years ago

Find the area of the following shape. You must show all work to receive credit. (10 points)

nalin [4]

Triangle ABF has base 10 and height 3, so area (1/2)*10*3 = 15.

Trapezoid EBCD has bases 6 and 7 and height 6, so area
.. (6+7)*6/2 = 39

The total area of the figure is
.. 15 +39 = 54 . . . . . square units