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mixas84 [53]
2 years ago
14

Thirteen people with different heights have a median height of 145 cm. How many people are taller than 145 cm ?

Mathematics
2 answers:
Vikentia [17]2 years ago
6 0

there r 5 people taller than 145 cm


ruslelena [56]2 years ago
5 0
Median is the middle height when arranged in increasing order

so it is like this

1,2,3,4,5
median is 3

so 13 people means 13 numbers
example
100,101,102,103,104,105,145,146,147,148,149,150,151
145 is median

there are 6 people taller than 145cm
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15. A rectangle has a length of 2x - 1 and a width of 3x + 7. Find the perimeter of this rectangle.
andrew11 [14]

Answer:

10x + 12 and 6x² + 11x - 7

Step-by-step explanation:

The perimeter (P) of a rectangle is calculated as

P = 2l + 2w ( l is length and w is width )

   = 2(2x - 1) + 2(3x + 7) ← distribute parenthesis

    = 4x - 2 + 6x + 14 ← collect like terms

     = 10x + 12

--------------------------------------------------

The area (A) of a rectangle is calculated as

A = lw

   = (2x - 1)(3x + 7) ← expand using FOIL

    = 6x² + 14x - 3x - 7 ← collect like terms

    = 6x² + 11x - 7

7 0
2 years ago
Justin has $7.50 more than Eva, and Emma has $12 less than Justin. Together, they have a total of $63.00. How much money does ea
uysha [10]

Answer:


Step-by-step explanation:   emma's amount be X .  justin has $7.50+x because he has $7.50 more than emma.Since emma has 7.50+x-$12.to get everyones amount add what they have together which is=$7.50+x+$7.50+x-12 which in total is $63.00.after the calculations you get x=30.now distribute the x equally. so justin has $7.50+30=37.50.we also distribute it with emma's which is 7.50+30-12=25.5.

justin=$37.50

Emma=$25.50

to be sure add 37.50+25.50=$63


5 0
3 years ago
Is the function even, odd or neither?<br> y=x^2-2x-8
mestny [16]

It is neither.

To be even, f(x) must equal f(-x).

If you substitute -x for x, you'd get

     y = (-x)^2 - 2(-x) -8

     y = x^2 +2x -8

This is not the same as the original, so this is not even.

To be odd, f(x) must equal -f(-x).

If you take the -x substitution from the last step and then multiply it by -1, you'd have:

      y = -1 (x^2 +2x -8)

      y = -x^2 -2x +8

This is not the same as the original either.

The function is neither even nor odd.

5 0
2 years ago
Read 2 more answers
A circle is divided into 8 equal parts. What is the total<br>angle measure of 4 parts?<br>​
snow_lady [41]

Answer:

Step-by-step explanation:

A circle is divided into 8 equal parts means : 360°/8 = 45°

the total  angle measure of 4 parts is :

45°×4=180°

4 0
3 years ago
Use rounding to estimate the difference of 18.14 - 9.88.<br><br> A. 6<br> B. 9<br> C. 7<br> D. 8
Anna35 [415]

Answer:


D. 8 is the answer


7 0
2 years ago
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