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Korolek [52]
3 years ago
7

I had 28 tests to mark and finished 54%. How many do I have left

Mathematics
1 answer:
timama [110]3 years ago
6 0

52 tests because you would multiply 28 by 100 then divide by 54. You would get 51.851, but you cannot have and 8th of a test, so you would round up

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Is the inverse of a function always a function? explain your answer please
lys-0071 [83]
No, i don't think so

In a function, one value of x is only assigned to one value of y

It's okay if you can get the same y value from two x value, but that mean that inverse can't be a function.

y = x^2 is a function

but inverse y = +/- √x   is not
6 0
3 years ago
5. Is this function one-to-one? How do you know?
sergejj [24]

Answer:

If the graph of a function f is known, it is easy to determine if the function is 1 -to- 1 . ... If no horizontal line intersects the graph of the function f in more than one point, then the function is 1 -to- 1 . A function f has an inverse f−1 (read f inverse) if and only if the function is 1 -to- 1 .

Step-by-step explanation:

Plz Give brainliest

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3 years ago
The freezer is 18c after cooling the temp. Was -12c, what's the difference?
zmey [24]
I am pretty sure 30 is the answer
6 0
3 years ago
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The hardware store where you work charge 80 cents including tax, for a pound of nails. A customer purchases 5 3/4 pound of nails
Sophie [7]

Answer:

$4.60

Step-by-step explanation:

1 lb ---> 80 cents

5 3/4 lb ---> 5 3/4 * 80 cents

5 \dfrac{3}{4} \times 80 =

= \dfrac{23}{4} \times \dfrac{80}{1}

= \dfrac{23 \times 80}{4 \times 1}

= \dfrac{1840}{4}

= 460

460 cents = $4.60

5 0
3 years ago
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Use the following cell phone airport data speeds​ (Mbps) from a particular network. Find the percentile corresponding to the dat
Tems11 [23]

Answer:

Thus percentile lies between 53.3% and 55.6 %

Step-by-step explanation:

First we arrange the data in ascending order . Then find the number of the values corresponding to the given value. Then equate it with the number of observations and x and then multiply it to get the percentile. n= P/100 *N

where n is the ordinal rank of the given value

N is the number of values in ascending order.

The data in ascending order is

0.1 0.2 0.2 0.2 0.3 0.6 0.6 0.6 0.7 0.8 0.8 0.8 0.9 1.3

1.5 1.7 1.9 2.2 2.3 2.3 2.6 2.8 3.3 3.5 5.5 6.1 6.4 6.9 7.5 7.9 8.3 9.8 10.1 11.8 11.9 12.1 12.3 12.7 12.9 13.8 13.8 14.6 14.7 14.8 27.5

Number of observation = 45

4.9 lies between 3.3 and 5.5

x*n = 24 observation x*n = 25 observation

x*45= 24 x*45= 25

x= 0.533 x= 0.556

Thus percentile lies between 53.3% and 55.6 %

7 0
3 years ago
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