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Alex73 [517]
3 years ago
5

How do I start off these problems?

Mathematics
1 answer:
Marina CMI [18]3 years ago
8 0
First of all you have to make them equal to each other. What I mean is the following
3x+20=2x+40
Then you should just solve for x
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Find n so that mean of the data set is 140. (120, 145, 130, 80, 95, 100, 340, n)
Varvara68 [4.7K]

Answer:

we know that mean of the data set is

Sum of all terms / total no. of terms

mean = 120+145+130+80+95+100+340+n / 8

140 = 1010+n / 8

140*8 = 1010 + n

1120 = 1010 + n

1120 - 1010 = n

110 = n

therefore the value of n should be 110

hope it's helpful

5 0
3 years ago
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If a dog eat 10 apples and there were 50 apples how much are left​
Nadya [2.5K]

Answer:

40

Step-by-step explanation:

50-40

7 0
3 years ago
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Helppppppppppppppppppp ill mark you brainlist
erastovalidia [21]

c^2 = a^2 + b^2

c^2 = 16^2 + 20^2

c^2 = 256 + 400

c^2 = 756

Now, square root both sides.

<h2><em><u>c = 27.5 in</u></em></h2>
5 0
3 years ago
What is the square root of 12
Viktor [21]
12 is not a perfect square, but 4, a factor of 12, is a perfect square.  Thus, separate the problem

sqrt(12) into factors as follows:

sqrt(12) = sqrt(4)*sqrt(2)    = 2*sqrt(2)  (answer)
6 0
3 years ago
19. 140% of 60<br> find the percent of the number. Explain your method
KonstantinChe [14]

Answer:

84

Step-by-step explanation:

is                    x           140

----   SO ...    -------  =  --------

of                  60         100

(hit like pls)

60*140=100x

8400=100x

/100     /100

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

   84 = x

8 0
2 years ago
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