2/5/9 solved will be 0.4 repeating as a decimal, & 4/9 as a fraction
It'd be easier to do #18 if y ou were to break it up:
14* (first term + 14th term)
Sum from n=1 to 14 of n = S = ---------------------------------
14 2
14(1+14)
= ---------------- = 7(15) = 105
2
The sum of twice that is 210. The sum of "1 from n=1 to n=14" is just 14.
The final sum is 210 + 14 = 224 (answer)
68 cubic in.
Explanation:
The explanation is too long, just trust me and look at keep in mind these steps:
Separate that figure into 2 pyramids and 1 rectangular prism. Find the volume of each figure and add them all up
Keep in mind that the formula for volume of rectangular prism is length x width x height
The formula for volume of triangular prism is
1/2 x length x width x height.
Hope this helps! Comm.ent me if u have any questions
Mark me brainliest if I got this right!
-SpaceMarsh
He has a total of 40
$40-$5-$15=$20
he has a total of $20 left
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