Answer:
it is 21 because 9+10=19+2=21-10=11+10=21 its magic
Step-by-step explanation:
Part a b2+49−(b−7)2
Distribute:
=b2+49+−b2+14b+−49
Combine Like Terms:
=b2+49+−b2+14b+−49
=(b2+−b2)+(14b)+(49+−49)
=14b
Answer:
=14b
part b
(2a+6b)2−24ab
Distribute:
=4a2+24ab+36b2+−24ab
Combine Like Terms:
=4a2+24ab+36b2+−24ab
=(4a2)+(24ab+−24ab)+(36b2)
=4a2+36b2
Answer:
=4a2+36b2
32 copies - 1 min - 60 seconds
176 copies - t
32 * t = = 176 * 60 seconds
t = 176 * 60 / 32 = 330 seconds
a. How many males surveyed preferred playing sports?
The relative frequency of men who prefer sports is:
0.30
Therefore, for this case we have:
(0.30) * (200) = 60
60 males surveyed preferred playing sports
b. How many people surveyed preferred to read a book?
The people who prefer to read books are:
0.10 + 0.15 = 0.25
Then, of the quantity interviewed we have:
(0.25) * (200) = 50
50 people surveyed preferred to read a book
c. How many females were surveyed?
The number of women interviewed is:
0.15 + 0.05 + 0.15 = 0.35
(0.35) * (200) = 70
70 females were surveyed
I’m pretty sure it’s 1/360 but don’t take my word for it I tried my best
