Try this solution:
Step-by-step explanation:
1) for zeros of the function: x²-6x-7=0; ⇒ x₁=7; x₂= -1.
2) for the vertex of the function: x₀= -b/2a, where a;b;c - numbers from ax²+bx+c=0 (from x²-6x-7=0).
x₀=6/2=3;
y₀= (4ac-b²)/4a; ⇒ y₀= -16.
It means, the coordinates of the vertex are (3;-16).
Total clay = πr²h = π x (4÷2)² x 6 = 12π in³
Clay ball = 4/3 x π x (1)³ = 4/3 π in³
Number of clay balls that can be made = 12π ÷ 4/3 π = 9
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Answer: 9 clay balls.
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Make this into an equation keeping the number as x
3x-3 = 57+x
3x-x = 57+3
2x=60
x= 30
prove this by substituting the x
30*3 -3 =57+30
87=87
there you have it :)
Answer:
21
Step-by-step explanation:
The pattern is going up by 3s
