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3 years ago

HELP!!!

Mathematics

1 answer:

Troyanec [42]3 years ago

8 0

Answer:

Step-by-step explanation:

18-12

12-X

X=12*12/18

X=8mm

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If LR = 12 and PR = 4, find LP. Explain.

Softa [21]

<h2>Answer:</h2>

LP = 8 because LR + PR = LP according to the Segment Addition Postulate, and 8 + 4 = 12 using substitution

<h2>Step-by-step explanation:</h2>

From this problem, we know that:

LR = 12

PR = 4

So here we have a Line segment. Recall that a line segment has two endpoints, places where they end or stop and they are named after their endpoints, so the line segment here is LR whose measure is 12. Then, according to Segment Addition Postulate it is true that:

LP + PR = LR

By substituting LR = 12 and PR = 4, we have:

LP + 4 = 12

Subtracting 4 from both sides:

LP + 4 - 4 = 12 - 4

LP + 0 = 8

Finally:

LP = 8

7 0

3 years ago

Read 2 more answers

Use the Distributive Property to expand the expression -(u-v)

deff fn [24]

Answer:

(U+V) is the answer to the solution

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3 years ago

Travis has hired Charlie and Dora to plant flowers . Dora can plant 150 flowers in the same time it takes Charlie to plant 120 f

Vikki [24]

Answer:

21 flowers

Step-by-step explanation:

because if dora can plant 18 plants then Charlie can plant 21 flowers

4 0

3 years ago

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":

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

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3 years ago

The area of a rectangular ceiling tile is 234 square inches. The perimeter is 62 inches. What are the dimensions of the tile?

saveliy_v [14]

I answered this using trial and error, so let me know if you need workings, but I got the dimensions as 18 inches and 13 inches.

I hope this helps!

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3 years ago