The initial start-up fee for signing up with Rita's lawn mowing service is $20, using simultaneous equations.
Simultaneous equations are two or more algebraic equations that share variables like x and y and can be solved at the same time.
Let y = fixed cost (initial start-up cost)
Let x = variable cost per lawn mowing
Equation 1: Customer A = y + 10x = $370
Equation 2: Customer B = y + 7x = $265
Subtract equation 2 from equation 1 to get:
3x = $105
x = $35
Substitute x in any of the two equations to find the value of y, thus:
Customer A:
y + 10($35) = $370
y + #350 = $370
y = $20 ($370 - $350)
Thus, the initial start-up fee for signing up with Rita's lawn mowing service is $20, using simultaneous equations.
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