Mariana's score if got right if she got 5 wrong is 60 points.
Mariana's score if got right if she got xx wrong is 80 - 4xx.
<h3>What is Mariana's score?</h3>
The first step is to determine the number of questions that Mariana got right. In order to get the number of questions that she got right, subtract the total number of number of questions from the questions that he got wrong.
Questions that Mariana got right = total number of questions - questions he got wrong
Total number of questions = total number of points / point of each question
Total number of questions = 80 / 4
Total number of questions = 20
Questions that Mariana got right if he got 5 wrong = 20 - 5 = 15
Mariana's score = questions she got right x number of points per question
Mariana's score = 15 x 4 = 60 points
Questions that Mariana got right if he got x wrong = 20 - xx
Mariana's score = (20 - xx) x 4
Mariana's score = 80 - 4xx
To learn more about scores, please check: brainly.com/question/28627499
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Answer:
10 or x=10
Step-by-step explanation:
First we can combine like-terms.
8x+6=86
Then subtract 6 from both sides
8x=80
Divide by 8
x=10
Answer:
50-4/25 is 49 21/25
Step-by-step explanation:
Given that
a=3
b=3
c=2
The number and kind of roots depend on the Discriminant of the equation .
Formula for the Discriminant ,D is given by this
So using the formula we get that
Concept is that if the Discriminant is negative then no real solution is possible ,
here using the Discriminant formula we have got the Discriminat value as -15 which is a negative number so we say there is no real solution for the given information .
Hence <u><em>C</em></u> is the correct option .
Bearing in mind that, if you multiply, any integer whatsoever by 2, you end up with a even integer, 17*2, or 19*2, 88*2 you name it, you get an even number
now, you can get an odd integer by simply going from an even integer, back or forth, so if you have an even number of say 24, 24 - 1, 23, 24+1, 25, 23 and 25 are the odd ones next to 24
so.. let's pick some number, let's say hmm "a", we know 2*a is even, so 2a, thus, 2a +1 or 2a -1 is an odd one.... let's use hmm 2a + 1 as our first odd integer
to jump from an odd integer to another, you simply add 2, 3+2, 5, 5+2, 7 and so on
so... our first one is 2a + 1, so the next consecutive one, will then be (2a+1)+2
and next consecutive after that is (2a+1+2)+2
so our three consecutive odd integers are then
2a + 1
2a + 3
2a + 5
now, 4 times the middle is 4(2a+3)
the sum of the first and last is (2a+1) + (2a+5)
now, two more than that is just (2a+1) + (2a+5) + 2
thus
4(2a + 3) = (2a + 1) + (2a + 5) + 2
solve for "a"
