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3 years ago

What is negative 81 minus4

Mathematics

1 answer:

Ugo [173]3 years ago

5 0

-81 - 4 would equal to -85

hope i helped :)

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A translation of trapezoid PQRS (blue) to trapezoid P'Q'R'S' (green) is shown, where the location of Q' is the origin. The coord

Kruka [31]

On USATestprep the answer is C) (c-a,-b)

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3 years ago

Evaluate the expression when a is -5 and y is 7

sasho [114]

$a - 5y$

when a = -5 and y = 7 :

$( - 5) - 5(7) = - 5 - 35 = - 40$

Answer: -40

ok done. Thank to me :>

7 0

2 years ago

For a group of 100 people, compute(a) the expected number of days of the year that are birthdays of exactly 3 people.(b) the exp

Scilla [17]

Answer:

Step-by-step explanation:

Leaving leap years, a year contains 365 days.

For a group of 100 people, each person is independent of the other and probability of any day being his birthday has a chance of

$\frac{1}{365}$

a) Probability that exactly 3 people have same birthday = $\frac{1}{365^3}$

Each day is independent of the other

And hence no of days having exactly 3 persons birthday out of 100 persons is binomial with n = 365 and p = $\frac{1}{365^3}$

Expected value of days = np = $\frac{1}{365^2}$

b) Distinct birthdays is binomail with p =1/365 and n = 365

Hence

expected value = np =1

4 0

3 years ago

A jet flies over the Air Force Base at 10:20 a.m. At 10:32 a.m., the plane passes over the Navy Base Station, 120 miles away. Ho

kati45 [8]

So first calculate the time between the plane flied over the Air Force Bases (AFB) and Navy Base Station (NBS):
(time passed Air Force Bases) - (time passed Air Force Bases) = 10:32 - 10:20 = 12 mins
Since we know the distance that plane travel from AFB to NBS is 120 miles and the plane traveled that distance within 12 minutes.
We have
120 miles / 12 minutes = 10 miles / minute
Calculate it into miles per hour (60 minutes):
10 miles/minute x 60 minutes = 600 miles per hour.
ANSWER : 600 mph

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3 years ago

Mrs. Patil bought 4 packs of pencils for her class. Then she bought 3 more packs of pencils. There are 12 pencils in a pack. How

Cloud [144]

She bought 4, then she bought 3 more....so she bought 7 packs
each pack contains 12 pencils..

so 7 packs each containing 12 pencils ...
7(12) = 84 total pencils <===

5 0

2 years ago

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