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lapo4ka [179]
2 years ago
6

-19-(k + 7) + 10k I need help on this you have to simplify the expression

Mathematics
1 answer:
Step2247 [10]2 years ago
3 0

Answer: =9k−26

Step-by-step explanation:

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A pair of Jeans has a marked price AED 800.
Bumek [7]

Answer:

640

Step-by-step explanation:

you say 100% = 800

what about 80%(i get 80% after substracting 100% that's marked price - 20% discount)

then u say 80×800÷100

4 0
2 years ago
Mrs white wants to crochet beach hits and baby afghans for a church fund raising bazaar. she needs 7 hours to make a hat and 4 h
denis-greek [22]
This is a maximization problem so we apply derivatives here to determine the unknown variables in the problem. 

In this problem, we represent x as the number of hats made, and y as the number of Afghans made by Mrs White. 
Equation 1 relating to the time it takes to make these is expressed:

7x + 4y = 68
Another equation that represents inequality to the number of hats and Afghans respectively is expressed: 
x<= 14
y<=11

the third equation expresses the income from selling these items expressed as 
P = 21 x + 9y 
we subtitute 1 to 3

P = 9(68-7x)/4 + 21x = 153-15.75x + 21 x = 153 -5.25x 

So by trial and errror, x and y should be integers, we get two cases of which x and y should be

1) x = 4 ; y = 10
2) x = 8 ; y = 3


Subsituting to 3,  P1 = 174$ while P2is equal to $195, Answer then is 8 hats and 3 Afghans in total.
3 0
3 years ago
ABCD is a parallelogram
vova2212 [387]

Answer:

a) 2a

b) -a + b

c) -b -a

Step-by-step explanation:

a) From C, you just go down with a twice.

b) From A, you go up the a hence -a, then you go down b so -a + b.

c) From B, you go down b to O then you go up a to C.

5 0
2 years ago
Joel is considering putting a $1,000 laptop purchase on his credit card, which has an interest
Alex777 [14]

Answer: Joel is considering putting a $1,000 laptop purchase on his credit card, which has an interest

rate of 12% compounded monthly. How long will it take him to pay off the purchase if he

makes payments of $30 a month?

33.333

Step-by-step explanation: Divided 1000 by 30

7 0
2 years ago
What is number 2 been stuck on it for a while I need to know the sum
Whitepunk [10]
11k+6

You add same variables the add/subtract normal #s
8 0
2 years ago
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