Answer:
con you be more organized on how you post the question will answer if fixed
Step-by-step explanation:
Solve the top equation for x and then substitute that into the bottom equation and solve for y:
Top equation: subtract 4 from both sides to get x = y - 4
Substitution and simplify:
y = 4(y - 4) - 10
y = 4y - 16 - 10
y = 4y - 26
-3y = -26
y = 26/3 or 8 1/3 or 8.333 (those are all the same but in different forms)
area = pi X radius squared
so area = 3.14 x 124^2
= 3.14 x 15376 = 48,280.64 square centimeters.
8*(1/x) = 4*(1/8)
8/x = 4/8
64 = 4x
x = 16
Answer:
battery costs: 0.39...............
