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Nastasia [14]
3 years ago
6

If 2k - 3 = 9 (k+7)-3 then k is ????

Mathematics
2 answers:
Akimi4 [234]3 years ago
6 0

Answer:

K = -9

Step-by-step explanation:

2k-3 = 9(k+7)-3

2k-3 = 9k+63-3

2k-3 = 9k+60

2k-9k = 60+3

-7k = 63

-k = 9

k = -9

m_a_m_a [10]3 years ago
4 0

Answer:

k= -9

Step-by-step explanation:

2k-3=9k+63-3     [expand the 9(k+7) first]

2k-9k=63-3+3     [put the like terms together]

-7k=63                 [do the simple math]

k= 63 ÷ by -7

k=-9  

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Winter coats are marked 70% off on February 1st. If a coat costs 57.75 on January 31st, how much will it cost on February 1st.
satela [25.4K]

Answer:

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Step-by-step explanation:

Given:

Original Cost  =57.75

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To Find:

Price after discount = ?

Solution:

We have to find the price after discount which is given by the formula

Price after Discount = Original Cost - Discount Price

We have to find the value of discount price

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Putting in the values

Discount Price = 70 % * 57.75

it becomes

Discount Price =\frac{70*57.75}{100}

It becomes

                         =\frac{4025}{100}

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Now

Price after Discount = Original Cost - Discount Price

Putting in the values

it becomes

Price after Discount = 57.75-40.25

                                   = 17.5

So Price after discount would be 17.5 on February 1st


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3 years ago
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