Answer:
$350
Explanation:
Your "20x + 30y = C(x, y)" formula is correct. For part b, you need to substitute 10 for x and 5 for y:
20(10) + 30(5) = C(10, 5) = 200 + 150 = 350 (all figures represent dollar amounts).
Kito's total July income was $350.
x=mowing lawn
y= babysitting
=20x+30y
=20 x 10 + 30 x 5
=200 + 150
=350
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