Which expressions represent a quadratic expression in factored form? (x − 3)(x + 2) 5(x + 9) (x − 1)(x − 1) x2 + 8x (x + 4) − (x + 6)

Answer this question only if you know the 30 points and

In a probability experiment, karen flipped a coin 76 times. the coin landed on heads 32 times. what percentage of the coin flips resulted in tails? round to the nearest percent. a. 58% b. 65% c. 42% d. 60%

If 1.4% of the mass of a human body is calcium, how many kilograms of calcium are there in a 165-pound man? 1.0 kg ca 5.1 kg ca 1.0 x 102 kg ca 5.1 x 102 kg ca