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Annette [7]
3 years ago
7

Evaluate the functions.

Mathematics
1 answer:
Bad White [126]3 years ago
4 0
2. 3x-8
a.-5
b.-17
c.-8

4.(x^2)-x
a.20
b.2
c.42

6.-(x^2)+6x-4
a.-31
b.-11
c.1
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All 5 students in Mrs. Awful's class got a 50 on the test. For the next test, one of the students got 100 but the remaining 4 st
Anarel [89]

Data on first test: 50, 50, 50, 50, 50
Mean = 250 / 5 = 50

In the next test, Data is: 50, 50, 50, 50, 100

Mean = sum of data / number of data
Mean = 50 + 50 + 50 + 50 + 100 / 5
M = 300 / 5
M = 60

In short, Your Answer would be 60

If You're looking for combined progress (average of class then, it would be: 50 + 60 /2 = 110/2 = 55

Hope this helps!
5 0
4 years ago
How do i find the least common denominator of 3/8 and 5/6?<br><br>No links please.​
torisob [31]

Step-by-step explanation:

first find a number that makes divided both if you don't get multiply the denominators

8 0
3 years ago
What is the area of the circle if XY = 5.4 mm?
inysia [295]
So the answer would be A = πr 2 because we are talking about area 
6 0
3 years ago
Which of the following statements describes the absolute value of a number "a"?
Softa [21]
This is a tricky question as for me. But I think, I'd go with <span>C) The distance from the number "a" to 0 on a number line can be represented by the absolute value of a number "a." As it's sounds better in practical way.</span>
5 0
4 years ago
Tomos is a skier he completed a ski race in 2 min 6 seconds
Varvara68 [4.7K]

Answer: 3\ min\ 12\ s

Step-by-step explanation:

The complete exercise is: "Tomos is a skier he completed a ski race in 2 min 6 seconds the race was 525 m in length. Tomos assumes that his average speed is the same for each race. using this assumption, work out how long tomos should take to complete an 800 m race give your answer in minutes and seconds"

For this exercise you can use the following formula to find the average speed :

V=\frac{d}{t}

Where "d" is the distance and "t" is the time.

In this case, based on the information given in the exercise, you can identify that:

d=525\ m

Since  he completed a ski race in 2 min 6 seconds, and 1 minute has 60 seconds, you ge that this time in seconds is:

t=120\ s+6\ s=126\ s

Substitute these values into the formula to find the average speed:

V=\frac{525\ m}{126\ s} \\\\V=\frac{25}{6\ }\frac{m}{s}

The formula for the time is:

t=\frac{d}{V}

Knowing that Tomos assumes that his average speed is the same for each race, for the  800 meters race you can identify that:

V=\frac{25}{6\ }\frac{m}{s}\\\\d=800\ m

So, substituting values into the formula and evaluating, you get that the time it takes him to complete this race is:

t=\frac{800\ m}{ \frac{25}{6\ }\frac{m}{s}}\\\\t=192\ s

Convert from seconds to minutes:

(192\ s)(\frac{1\ min}{60\ s} )=3.2\ min

Converting 0.2 minutes to seconds, you get:

(0.2\ min)(\frac{60\ s}{1\ min} )=12\ s

Therefore:

t=3\ min\ 12\ s

8 0
3 years ago
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