find the original number, A two-digit number is seven times the sum of its...

A two-digit number is seven times the sum of its digits.  The number formed by reversing the digits is 18 less than the  original number. Find the original number.

Subsets of real numbers, is it true or false that all whole numbers are rat...

is it true or false that all whole numbers are rational numbers

Determine z-scores and percentiles, Q. Determine Z-scores and Percentiles? ...

Q. Determine Z-scores and Percentiles? Ans. Z-scores help measure how far a piece of data is from the mean. More specifically, Z-scores tell how far a piece of data is fr

Time table, tips to memorize my time table

tips to memorize my time table

#rounding off, I am the least two digit number which round off to 100?

I am the least two digit number which round off to 100?

What was brian''s total commission on these three sales, Brian is a real es...

Brian is a real estate agent. He forms a 2.5% commission on each sale. During the month of June he sold three houses. The houses sold for $153,000, $299,000, and $121,000. What was

Cluster sampling, Cluster Sampling Cluster sampling is where a few geog...

Cluster Sampling Cluster sampling is where a few geographical regions for illustration, a location, village or town are selected at random and say every single household or sho

Vectors, calculate the vector LM given l(4,3),m(-1,2)

calculate the vector LM given l(4,3),m(-1,2)

Je veux le resumé des suites numériques,

Prove that the height of the center of the balloon, A round balloon of radi...

A round balloon of radius 'a' subtends an angle θ at the eye of the observer while the angle of elevation of its centre is Φ.Prove that the height of the center of the balloon is a