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Radda [10]
3 years ago
14

The average of students is 15 years if the age of a teacher is included their average becomes 18 years .what is the age of the t

eacher ?
​
Mathematics
2 answers:
xxTIMURxx [149]3 years ago
8 0

Answer:

21; the age of the teacher

Step-by-step explanation:

15+x/2=18

Estimate - I estimated in the 20's because it only averaged up a little bit

Started with 23 and kept going until i got to my answer

21

15+21/2

36/2

18

Please mark brainliest :)

zubka84 [21]3 years ago
6 0
I think the age of the teacher is 21
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Solve the inequality for x. Show each step of the solution.<br> 4x-6(x+1)&gt;12
VLD [36.1K]
Answer:

x < - 9

steps:

4x - 6(x + 1) > 12

2x - 3(x + 1) > 6

2x - 3x - 3 > 6

2x - 3x > 6 + 3

-x > 6 + 3

-x > 9

x < -9


hope this helps, have a great day
mark brainliest :)!!

8 0
3 years ago
Stephen’s lunch bill is currently at $8.33. Stephen orders a fruit salad for take-out, and wants to leave $2.25 as a tip for his
KatRina [158]

Answer:

$4.42

Step-by-step explanation:

by combining $8.33 and $2.25 you get a combined total of $10.58 and if you subtract that from $15 you get $4.42 as the amount of money remaining.

7 0
3 years ago
A potential buyer of the breed of snake known as a rattlesnake wishes to find the average weight and length of a full-grown rept
BlackZzzverrR [31]

Answer:

A

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5 0
3 years ago
Read 2 more answers
the legs of a right triangle have lengths of 28 meters and 21 meters. the hypotenuse has a length of 5x meters. what is the valu
Hitman42 [59]
We have a right triangle with
a = one leg = 28
b = other leg = 21
c = hypotenuse = 5x

use the pythagorean theorem (a^2+b^2 = c^2) and solve for x

a^2+b^2 = c^2
28^2+21^2 = (5x)^2
784+441 = 25x^2
1225 = 25x^2
25x^2 = 1225
(25x^2)/25 = 1225/25
x^2 = 49
sqrt(x^2) = sqrt(49)
|x| = 7
x = 7 or x = -7

Since the hypotenuse has length 5x meters, this means
5x = 5*7 = 35
or
5x = 5(-7) = -35

Toss out the negative length as it makes no sense. 

The only value of x is x = 7

Therefore the final answer is x = 7
6 0
3 years ago
Haruka hiked several kilometers in the morning. She only hiked 6 kilometers in the afternoon, which was 25% less she had hiked i
SOVA2 [1]

WEW can use a simple equation to solve this

Let x be the number of kilometers she hiked in the morning . Then

x - 0.25x = 6 (Note 0.25 = 25 %)

0.75x = 6

x = 6 / 0.75 = 8 kilometers answer

4 0
4 years ago
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