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sineoko [7]
3 years ago
13

Simplify the the problem 2x^2-4x-390=0 ​

Mathematics
1 answer:
Sergio039 [100]3 years ago
7 0

Answer:

The answer is <em>-195</em>

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in an examination ,80%examines passed in English ,70%in mathematics and 60% in both subject if 45 examines failed in both find t
stiv31 [10]

Answer:

135 and 135

Step-by-step explanation:

The computation is shown below:

The number of examiners who passed in only one subject is as follows

=  n(E) - n(E ∩M) + n(M) - n(E ∩M)

= (80 - 60 + 70 - 60)%

= 30%

Now the number of students who passed in minimum one subject is

n(E∪M) = n(E) + n(M) -  n(E ∩M)

= 80 - + 70 - 60

= 90%

Now the number of students who failed in both subjects is

= 100 - 90%

= 10% of total students

= 45

So total number of students appeared for this 450

So, those who passed only one subject is

= 450 × 30%

= 135

Now the Number of students who failed in mathematics is

= 100% - Passed in Mathematics

= 100% - 70%

= 30% of 450

= 135

4 0
2 years ago
1. A quadratic equation can have all of the following number of solutions except
mina [271]
You cannot have infinite solutions.
7 0
3 years ago
How many pages could I read per day for 4 weeks if the book has 292 pages?
Gemiola [76]
About 10 pages
If you divide 292 / 28 since there is 28 days in 4 weeks
7 0
3 years ago
22+(30-4) ÷2 And 18+(22-4) ÷6
schepotkina [342]

22 + (30 - 4) divided by 2

30 - 4 = 26

26/2 = 13

22 + 13 = 35

35

18 + (22 - 4) divided by 6

22 - 4 = 18

18 divided by 6 = 3

18 + 3 = 21

21

6 0
3 years ago
Read 2 more answers
The probability of Tina's winning a tennis game is 75%. What is the probability that Tina will lose a game A 10% B 25% C 50% D 7
Flauer [41]

Answer:

<u>The correct answer is B. 25%</u>

Step-by-step explanation:

If Tina's probability of winning a tennis game is 75%, therefore:

(100% - 75%) = Probability that Tina will lose a game

25% = Probability that Tina will lose a game

<u>The correct answer is B. 25%</u>

6 0
3 years ago
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