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4 years ago

I need help solving this

Mathematics

2 answers:

Temka [501]4 years ago

4 0

subtracting 9.1 - 12.9 is -3.8

Vlad1618 [11]4 years ago

4 0

Just do
12.9 - 9.1 which is 3.8
then put a negative sign because yor negative # has a higher absolute value ( simply bigger)
the answer would be -3.8

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

LenKa [72]

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

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

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

TOTAL NUMBER OF ARTICLE= 7

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

Average cost of 7 articles

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

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

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3 years ago

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love history [14]

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Step-by-step explanation:

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4 years ago

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creativ13 [48]

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Step-by-step explanation:

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fenix001 [56]

Answer:

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Step-by-step explanation:

Rewrite the quadratic equation $2\, x^{2} - 3\, x + 8 = 0$ in the standard form $a\, x^{2} + b\, x + c = 0$ :

$2\, x^{2} + (-3)\, x + 8 = 0$ , for which:

$a = 2$ .
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The quadratic discriminant of $a\, x^{2} + b\, x + c = 0$ is $(b^{2} - 4\, a\, c)$ . The quadratic discriminant of $2\, x^{2} + (-3)\, x + 8 = 0$ would be: