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3 years ago

Evaluate |x| + |-2y| when x = -2 and y=3

Mathematics

2 answers:

Dafna1 [17]3 years ago

4 0

8 -2 chafes in to 2 6+2=8

Jobisdone [24]3 years ago

3 0

It's 8 because -2 turns to +2 and -6 turns to +6. so 2+6=8

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Solve for m and show your work. 4n=3m-1

Bad White [126]

4n = 3m - 1

4n = 3m - 1
Subtract 3m from both sides.
-3m + 4n = -1
Subtract 4n from both sides.
-3m = -4n - 1
Divide both sides by -3.
m = 4/3n + 1/3

m = 4/3n + 1/3

4 0

4 years ago

Read 2 more answers

A professor has recorded exam grades for 10 students in his class, but one of the grades is no longer readable. If the mean sco

Nostrana [21]

Answer:

unreadable score = 35

Step-by-step explanation:

We are trying to find the score of one exam that is no longer readable, let's give that score the name "x". we can also give the addition of the rest of 9 readable s scores the letter "R".

There are two things we know, and for which we are going to create equations containing the unknowns "x", and "R":

1) The mean score of ALL exams (including the unreadable one) is 80

so the equation to represent this statement is:

mean of ALL exams = 80

By writing the mean of ALL scores (as the total of all scores added including "x") we can re-write the equation as:

$\frac{R+x}{10} =80$

since the mean is the addition of all values divided the total number of exams.

in a similar way we can write what the mean of just the readable exams is:

$\frac{R}{9} = 85\\$ (notice that this time we don't include the grade x in the addition, and we divide by 9 instead of 10 because only 9 exams are being considered for this mean.

Based on the equation above, we can find what "R" is by multiplying both sides by 9:

$\frac{R}{9} = 85\\R=85*9= 765$

Therefore we can now use this value of R in the very first equation we created, and solve for "x":

$\frac{R+x}{10} =80\\\frac{765+x}{10} =80\\765+x=80*10=800\\765+x=800\\x=800-765=35$

4 0

3 years ago

Seven halves is equal to how many wholes?

nikdorinn [45]

Seven halves would equal to 3.5 wholes. What you do is divide 7 by 2 to find out how many wholes their are.

6 0

3 years ago

A city park is in the shape of a rectangle with width of 25 yd. and length of 60 yd. What is the length of the diagonal that run

Jobisdone [24]

Answer:

65 yd

Step-by-step explanation:

The diagonal of a rectangle can be found using

Pythagoras' Theorem a² + b² = c²

(where a and b are the legs, and c is the hypotenuse of a right triangle)

Given:

a = 25
b = 60

⇒ 25² + 60² = c²

⇒ c² = 4225

⇒ c = √4225

⇒ c = 65

Therefore, the length of the diagonal is 65 yd

7 0

3 years ago

Will give Brainliest! if right!

Fiesta28 [93]

The range is the difference in between the largest and the smallest number in the set.

On a box and whisker plot, the maximum and the minimum are shown as the dots on the furthest right and left side. On this particular one, they would be the dots on 29 and 17.

All you have to do is
29-17
and you get 12

The range of the data is 12.

Hope this helps!

6 0

3 years ago

Read 2 more answers