Evaluate this please help me

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?

Write the equation of the circle centered at (10,-2) with radius 2