Multiply both sides by the reciprocal (-8/7). You would get 40/7 or 5.71428571
X would equal 81 because the square root of 81 is 9.
9 x 9 = 81
Answer:
Step-by-step explanation:
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Answer:
length = 5
width = 9
Step-by-step explanation:
V = lwh
let 'x' = length
let '4+x' = width
9 = height
405 = 9x(4+x)
405 = 36x + 9x²
this is a quadratic equation: 9x² + 36x - 405 = 0
factor out a 9 to get:
9(x² + 4x - 45) = 0
9(x-5)(x+9) = 0
one root is 5 and the other is -9
since distance cannot be negative we use 5 as the length and 9 is the width
Answer:
-1
Step-by-step explanation:
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