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docker41 [41]
3 years ago
14

Can someone please help me solve this problem

Mathematics
1 answer:
ololo11 [35]3 years ago
3 0

Answer:

3

Step-by-step explanation:

substitute -2 in where y is.

the subtraction sign in front of the 3 makes it negative so -3 x -2 is positive 6.

4x+6=18, subtract 6 on both sides.

4x=12

divide 4 on each side.

×=3

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{\bold{\red{\huge{\mathbb{QUESTION}}}}}

what is the average cost of 7 articles if 3 of them cost 30k each and the rest cost 12.5k each

\bold{ \red{\star{\blue{GIVEN }}}}

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\bold{\blue{\star{\red{TO \:  \: FIND}}}}

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\bold{  \green{ \star{ \orange{FORMULA \:  USED}}}}

\red{AVERAGE  =  \frac{TOTAL \:  COST}{ NUMBER  \: OF\: ARTICLES }}

\huge\mathbb{\red A \pink{N}\purple{S} \blue{W} \orange{ER}}

Average \:  cost  \: of  \: 7  \: articles -  >  \\  \frac{(3 \times 30k) + (12 .5k \times 4)}{7}  \\  \frac{90k + 50k}{7}  \\  \frac{140k}{7}  \\  \blue {Average \:  cost  \: of  \: 7  \: articles -  >} \\ 20k

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