First bring the 9 to the other side by subtracting it so you get the equation; x^2+10x-9=0 and you answer would be x=9 and x=1. you may have wrote the question own wrong? is the x^2 negative? if so i give my answer :)
Answer:
12
Step-by-step explanation:
Answer + Step-by-step explanation:
<u>the probability that a child will not fall on any given day</u> :
= (63 × 64 + 27 × 88) ÷ 100
= 64.08 %
<u>the probability that a child will fall in dry weather</u> :
= (27 × 12) ÷ 100
= 3.24 %
40/5 is 8, so when t=1, r=8.
8 • 11 is 88, so when t=11, r=88.