Hello!
The formula for the area of a circle is:
A = x r²
Nancy gets a weekly allowance or $18. She spends $3 each week on art supplies. She splits the rest of her allowance into equal a
1 answer:
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You solve the equation : t^2 - 9t - 90 = 0 ;
Δ = ( - 9 )^2 - 4 * 1 * ( - 90 ) = 81 + 360 = 441 ;
t1 = ( 9 +
) / 2 = 30 / 2 = 15 ;
t2 = ( 9 -) / 2 = -12 / 2 = - 6 ;
The numbers are 15 and - 6 ;
Δ = ( - 9 )^2 - 4 * 1 * ( - 90 ) = 81 + 360 = 441 ;
t1 = ( 9 +
t2 = ( 9 -
The numbers are 15 and - 6 ;
Answer:
Step-by-step explanation:
Given
Let the number be x
So:
Required
Using trial and improvement, find x
This implies that we keep guessing the values of x until we get a value that match the equation.
Let
So, we have:
Take the square root of 625
Let
So, we have:
Take the square root of 729
At this point, we can conclude that x is approximately 729 because
So: