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8_murik_8 [283]
2 years ago
9

Find square of (6m-5n) by using formula.​

Mathematics
1 answer:
pshichka [43]2 years ago
4 0

Answer:

36m² -60mn +25n²

Step-by-step explanation:

Formula=(a-b)²=a²-2ab+b²

(6m-5n)²

=(6m)²- 2×6m×5n + (5n)²

=36m² -60mn +25n²

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3n^2-1 find the 2nd and 5th term
Butoxors [25]

Answer:

2nd term = 11

5th term = 74

Step-by-step explanation:

3n² - 1

n = 2 , 2nd term = 3*2²  - 1

                           = 3*4 -1

                          = 12 - 1

                          = 11

n= 5 , 5th term = 3*5² - 1

                        = 3*25 - 1

                      = 75 - 1

                      = 74

7 0
3 years ago
Read 2 more answers
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
2 years ago
Read 2 more answers
What is the value of 5 in 756? write and draw to explain how you know
Dennis_Churaev [7]
The value of 5 is 10 because it is in the tens place. If you draw a place value chart it shows that 5 is in the tens place. You could also draw it with 5 blocks with ten cubes.

Happy studying ^_^
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3 0
3 years ago
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Solve each system of linear or non-linear equations. Show all work!!<br> 3x - 4y = 13<br> 2x + y = 5
OLga [1]
Answer: See below

Explanation:

3x - 4y = 13 (1)
2x + y = 5 (2)
——————
3x - 4y = 13
4(2x + y = 5) (2) times 4
——————-
3x - 4y = 13
8x + 4y = 20
——————-
11x = 33
x = 33/11
x = 3

Plug x = 3 in (2):

2(3) + y = 5
6 + y = 5
y = 5-6
y = -1

Thus, x = 3 and y = -1
6 0
3 years ago
How many cards he has left​
lisabon 2012 [21]

Answer:

Wrong grammar

Step-by-step explanation:

how many cards DOES HE HAVE LEft

3 0
3 years ago
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