Lucas and david and measure the length of the school garden who's his measurement is 11.3 m in devin's measurement is 113 cm could both be correct explain

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant.given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.

Find the ratios of the corresponding sides