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Ber [7]
1 year ago
8

I need help please!!

Mathematics
1 answer:
vivado [14]1 year ago
4 0

Answer:

b.

Step-by-step explanation:

15 .12.9the sum of 5 4.3

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A train travels 63 kilometers in 2 hours, and then 87 kilometers in 2 hours. What is its average speed?
Lesechka [4]
87 - 63 = 14
14/2 = 7
7kmph
6 0
3 years ago
Read 2 more answers
Between what two consecutive integers is <img src="https://tex.z-dn.net/?f=%5Csqrt182" id="TexFormula1" title="\sqrt182" alt="\s
Elden [556K]

Answer:

C. 13 and 14

Step-by-step explanation:

They notice that the square root of 182 is between 13 an 14, and it gives them the idea that the numbers 13 and 14 are the solution.

Let n be the smaller of the two consecutive integers.

   Then the other integer is  (n+1).

   We are given that  

      n*(n+1) = 182.

   Simplify

      n^2 + n - 182 = 0,

   Factor left side

      (n-13)*(n+14) = 0.

   The solutions are  n= 13  and  n= -14.

   You may check that both of them satisfy the problem' condition, giving you two answers

       the pair  (13,14)  and the pair  (-14,-13).

 

Many people prefer to solve this problem in a short way.

   They notice that the square root of 182 is between 13 an 14,

   and it gives them the idea that the numbers 13 and 14 are the solution.

   Then these people get the next idea that if the product of 13 and 14 is equal to 182,

   then the product of the opposite numbers is also 182, so

           both the pairs (13,14)  and  (-14,-13)  are solutions.

Solved and explained in detailed and short modes.

7 0
2 years ago
Can someone find the answer key for this
snow_tiger [21]
Search up the name of it and type answer key
6 0
3 years ago
Somebody help #9 geometry
IrinaK [193]

Answer:

41.1units^2

Step-by-step explanation:

A=\frac{h_{b}b }{2} \\=\frac{8*4}{2} \\=16units^2(triangle)

A=\frac{\pi r^2}{2}\\\frac{\pi 4^2}{2}\\=25.13units^2(semicircle)

Add both together

16+25.13\\=41.13units^2

4 0
3 years ago
A triangle has angle measures of 18° and 57°. What is the measure of the third angle?
Pachacha [2.7K]

Answer:

105°

Step-by-step explanation:

Measure of the third angle

= 180° - 18° - 57° (angle sum of triangle)

= 105°

5 0
1 year ago
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