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Elena-2011 [213]
2 years ago
13

3. Letx = -5 and y=-*

Mathematics
1 answer:
Varvara68 [4.7K]2 years ago
6 0

Answer:

A

Step-by-step explanation:

I don't really understand the numbers but if both X and Y are negative, then adding the 2 will result in a negative value.  Multiplying 2 negative values will be positive, as will dividing them, and sometimes subtracting will too.

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Number 2 and please provide a step by step explanation!!!!
Alekssandra [29.7K]

The number of students in 5th grade is 60, since 24% of 250 is 60.

Since 90 is 38% if 250, 38 is going to be the percent of all students in sixth grade.

20% of 250 is 50, so the percent of all students in seventh grade is 50.

Finally, 45 is 18% of 250, so 18 percent of all students are in eight grade.

Hope this helped :)

8 0
2 years ago
Read 2 more answers
Shown below is a problem Margaret solved and the steps she used to solve it. Margaret has entered this problem incorrectly. What
leva [86]

She has distributed the bracket incorrectly

\frac{1}{2}(64 + 5) - 0.2(- 20 + 10)

= \frac{1}{2}(69) - 0.2 (- 10)

=34.5 + 2

= 36.5



7 0
3 years ago
How do I solve this problem below!
mojhsa [17]

Answer:

$5.44

Step-by-step explanation:

$1.75 + $1.26 + $1.08 + $0.52 = $4.56

$10.00 - $4.56 = $5.44

3 0
3 years ago
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How many 5-letter words can be made using exactly 5 of the letters from
kow [346]

The total number of ways by words are formed is 35 ways.

According to the statement

We have given that the 5 letters and we have to make word from them and the letters are repeated as equal to letters in given words.

And we have to find the possible ways.

So, The given words are:

TEXAS and MEXICO

Here X = 2 and E = 2 and all other words are one time used words.

We can find possible ways by use of combination and permutation.

So,

Total number of ways = 3C_{1} ^{5} + 2C_{2} ^{5}

here 3 because three letters are not repeatable and 2 letters are repeated for 2 times.

So,

Total number of ways = 3C_{1} ^{5} + 2C_{2} ^{5}

Total number of ways = 3(\frac{5!}{1!} ) + 2(\frac{5!}{2!*3!} )

Total number of ways = 3(5) + 2(10)

Total number of ways = 15 + 20

Total number of ways = 35.

So, The total number of ways by letters are formed is 35 ways.

Learn more about combination and permutation here

brainly.com/question/11732255

#SPJ1

3 0
1 year ago
A survey was done to determine the effect of students changing answers while taking a​ multiple-choice test on which there is on
Umnica [9.8K]

Answer:

6% of the changes were from incorrect to​ incorrect

Step-by-step explanation:

The sum of the percentages must be 100%.

We have these following percentages

65​% of the changes were from incorrect answers to correct

29​% were from correct to incorrect

P% were from incorrect to incorrect

So

65 + 29 + P = 100

P = 100 - 94

P = 6

6% of the changes were from incorrect to​ incorrect

7 0
3 years ago
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