Kayla puts $225 in a savings account at the beginning of the year at the end of each month she with drew $10 from her account Matthew put $50 in his savings account at the beginning of the year at the end of each month he deposit $15 in his account let extra percent the number of months which have passes and why are you present the amount in each savings account Please help me with this I’ll mark you as a brainliest.

idk

step-by-step explanation:

use that smart brain

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204