Arithmetic problems (18 20:24:23) &#First simplify, then evaluate (T + 3t2-3) - (- t = 42), where t = - 1 2 (2A2 of 3ab-1) + a2 - (3ab-b2), where a = - 2, B = 1                                       

Arithmetic problems (18 20:24:23) &#First simplify, then evaluate (T + 3t2-3) - (- t = 42), where t = - 1 2 (2A2 of 3ab-1) + a2 - (3ab-b2), where a = - 2, B = 1                                       

A 2 is not a & sup2; if so, it should be typed as a ^ 2. (t = 42) is not (- t-42)? (T + 3t2-3) - (- t-42), where t = - 1 = t + 3T & sup2; - 3 + T + 42 = 3T & sup2; + 2t-39 = 3 (- 1) & sup2; + 2 (- 1) - 39 = 3-2-39 = - 382 (2A2 of 3ab-1) + a 2 - (3ab-b2)

There is a one meter long rod. Half of it is cut off in the first time, and the remaining half is cut off in the second time. How long is the remaining rod after the seventh time?
 
 
 
 

0.0078125

Mathematics loan of grade one, please answer in detail, thank you! (24 17:14:3)
A factory applies to the bank for two kinds of loans, a total of 350000 yuan, and the annual interest is 22500 yuan. The annual interest rate of a loan is 7%, and the annual interest rate of B Loan is 6%?

Let a be x and B be (35-x)
X*0.07+(35-X)*0.06=2.25
0.07X+2.1-0.06X=2.25
0.01X=2.25-2.1
0.01X=0.15
X=15
35-15 = 200000 yuan