<span>x intercept when f(x) = 0
so
</span><span>x^2-81 = 0
x^2 = 81
x = + 9 and x = -9
Answer
</span><span>C -9</span>
Answer:
graph C
Step-by-step explanation:
because the vertex is h,k. h is -3 k is -25. C is the only graph with a vertex at that location.
Answer:
Step-by-step explanation:
a.
5kg = 5000 g
5000 ÷ 125 = 40
Mary can make 40 packets
b. 40 x 99 = 3960
3960 ÷ 100 = 39.60
39.6 - 25 = 14.6
Therefore, Mary makes a profit of £14.6
There's 24 hours in a day
so 24/100 = 0.24 < that is the percentage per hour
first eating - %10. 0.24x10= 2.4hrs eating
free time - 15% 0.24x15= 3.6hrs of free time
homework - 10% 0.24x10 = 2.4hrs of homework
school - 25% 0.24x25= 6hrs of school
and sleeping = 40% 0.24x40=9.6hrs of sleep
add them(hours) all up and you'll get 24!
