The answer is 20.24
After rounding, it becomes 20.2
Answer:
The solution is x =2 for the given equation 
Step-by-step explanation:
We need to find the solution for x in the given equation.
Solving:
Subtract 
from both sides
Taking square on both sides
Putting values and solving
Verifying the solution by putting values of x in given equation
Putting x=18
So, x=18 is not solution o given equation.
Putting x = 2
So, x=2 satisfies the equation
The solution is x =2 for the given equation
Answer:
a = 6 and b = -1.
Step-by-step explanation:
To find the maximum value of y = -x²+ ax + b we differentiate it with respect to x to find the value of x at which it is maximum.
So dy/dx = d(-x²+ ax + b)/dx = -2x + a
we equate it to zero.
-2x + a = 0
-2x = -a
a = 2x
Now, given that x = 3 at the maximum value,
a = 2x = 2(3) = 6
Also, substituting y = 8 and x = 3 into y, we have
y = -x²+ ax + b
8 = -(3)²+ a(3) + b
8 = -9 + 3a + b
3a + b = 8 + 9
3a + b = 17
So, b = 17 - 3a
substituting a = 6, we have
b = 17 - 3(6)
b = 17 - 18
b = -1
So, a = 6 and b = -1.
Answer: 3 packets
12/2 = 6 seeds per packets
18/6 = 3 packets
Combine the "like terms" in <span>7p + 4 = – p + 9 + 2p + 3p:
7p + 4 = 4p + 9 Again, combine like terms, obtaining 3p = 5.
Solving for p, p = 5/3</span>
