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OverLord2011 [107]
2 years ago
8

If 3 lawns are mowed in 4 hours, how long does it take to mow 21 lawns?

Mathematics
2 answers:
VladimirAG [237]2 years ago
6 0

Answer:

28 hours

Step-by-step explanation:

21/3 = 7

7x4=28

Serggg [28]2 years ago
4 0
28 I guess because 3+4=7 and 21+7=28
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Make ”a” the subject of the formula 9a-8=2(a-b)
beks73 [17]

Answer:

Step-by-step explanation:

9a - 8 = 2a - 2b

7a - 8 = -2b

7a = 8 - 2b

a = (8 - 2b)/7

3 0
3 years ago
What is median of 3 7 5 2 4 2 53 6 9 7 7 3 5 2 7 3 2 2 7
ludmilkaskok [199]

Answer:

5

Step-by-step explanation:

To find the median number of

3 7 5 2 4 2 53 6 9 7 7 3 5 2 7 3 2 2 7

Number them from least to greatest

2 2 2 2 3 3 3 4 5 5 6 7 7 7 7 7 9 53

Since this isn't an even numbered set, all we do is cancel each number out equally on both sides until only one number which should be in the middle is left. This gives you an answer of 5

Hope this helps!

3 0
3 years ago
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6+ (-x) + 2x + (-7) + 2x
sashaice [31]

Answer:

3x-1

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7 0
3 years ago
Use completing the square to find the value to add that makes x^2 - 12x a perfect square trinomial. Then write the expression as
yarga [219]

Answer:

Step-by-step explanation:

If you want to make

x^2-12x

into a perfect square binomial, take half the linear term, square it, then add it to both sides.  Our linear term is 12.  Half of 12 is 6, and 6 squared is 36.

The value that makes this a perfect square binomial is 36.

Writing the expression as a square of the binomial is:

(x^2-12x+36)-->(x-6)^2

4 0
3 years ago
Answer quick for brainliest
finlep [7]

Answer:

x=-15

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x=3

x=-21

Step-by-step explanation:

4 0
3 years ago
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