15. If S., S₂, S3, Sm be the sums of n terms of m A. Ps, whose first term as well as the common differences are 1,2,3, , m respectively;
show that S; + S2 + S3 +
+Sm
(m +1) (n + 1).
4
mn
=​

Will give brainliest plz hurry lexie surveyed 4 teenagers to find out approximately how many hours, per week, they read for fun, and how many siblings they have. brooke said she reads about 10 h a week for fun, and that she has 5 siblings. celia said she has 1 brother and 1 sister and reads for fun about 3 h each week. henry said he has 2 brothers and reads for fun about 30 min each week. jude said he doesn't read for fun and has 3 brothers and 3 sisters. use this information to complete the data table. express your answers as whole numbers or decimals. name hours of fun number of siblings brooke celia __ henry jude

Write the expression 7x^3-28xy^2 as the product of 3 factors

The functions below show the amount of money bella and sweet t had saved after earning money for doing chores. which description best compares the two functions?