(x + 3x3 + 8x2) - (8x – 7x3 + 7x2)
2 answers:
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Answer:
length = x - 2
Step-by-step explanation:
Area (A) of rectangle = lw ( l is the length and w the width )
A = x² - 7x + 10 = (x - 2)(x - 5) ← in factored form
l = =
cancel the factor (x - 5) on the numerator/ denominator, hence
l = x - 2
Answer:
B
Step-by-step explanation:
Using Pythagoras' identity in the right triangle.
The square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is
x² = 13² + 4² = 169 + 16 = 185 ( take the square root of both sides )
x = ≈ 13.6 ( to 1 dec. place ) → B