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Dimas [21]
3 years ago
6

Determine the domain of the function. f(x)=4/x^2

Mathematics
1 answer:
harkovskaia [24]3 years ago
3 0
Since x can be any value as long as the denominator equals 0 (it doesn't matter if it's positive or negative), we have to figure out when x^2=0, which is when x=0. Therefore, the domain is (-inf, 0) U (0, inf) 
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A train goes at a constant speed. If it covers 150 miles in 2 1 2 hours,
natali 33 [55]

Answer:

Velocity=Speed/Time

s = 150/2.5 = 60 miles per hour

To cover 270 miles, it will take

270/60 = 4.5 hours

4 0
3 years ago
The square of the difference between a number and 10.​
vaieri [72.5K]

Answer:

an integer

Step-by-step explanation:

it is the correct answer

6 0
3 years ago
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The the length of a rectangle is 9 centimeters less than four timesfour times its width. its area is 28 square centimeters. find
wel

Let w = width

then

5w-3 = length

w(5w-3) = 14

5w^2-3w = 14

5w^2-3w-14=0

(5w+7)(w-2) = 0

w = {-7/5, 2}

throw out the negative solution leaving

w = 2 centimeters

length:

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4 0
4 years ago
Tommy has a history test on Monday morning. He writes down the number of minutes he studies for the test each day for a week. Us
Schach [20]
To find the average, add up all the numbers, then divide that answer by the quantity of numbers.

STEP 1:
add all numbers

=30 + 20 + 0 + 0 + 0 + 0 + 120
=170 total


STEP 2:
divide total from step 1 by 7 (total quantity of numbers given, including zeros)

=170 ÷ 7
=24.2857
=24.3 rounded to nearest tenth


***You could also calculate the average by adding only non-zero results (20,30,120) and then dividing by 3 (the quantity of only non-zero numbers).


ANSWER: The average number of minutes studied per day is 24.3.

Hope this helps! :)
7 0
3 years ago
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Answer this for 50 pts, if u get it wrong I am reporting you
NeX [460]

Answer:

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