1. choose the correct simplification of the expression −5x2(4x − 6x2 − 3). 30x4 − 20x3 + 15x2 −11x4 − x3 − 8x2 −30x4 + 20x3 − 15x2 30x4 + 20x3 + 15x2 2. simplify (6x2 − 3 + 5x3) − (4x3 − 2x2 − 16). 2x3 − x2 + 21 −2x3 + x2 − 21 x3 + 8x2 + 13 −x3 − 8x2 + 13

Neoli is a nurse who works each day from 8: 00 am to 4: 00 pm at the blood collection centre. she takes 45 minutes for her lunch break. on average, it takes neoli 15 minutes to collect each sample and record the patient's details. on average, how many patients can neoli see each day?

Find the value of x for which line a is parallel to line b

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?