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3 years ago

3=7(4-2u)-6u can you help

Mathematics

2 answers:

Zina [86]3 years ago

5 0

u=5/4

Explanation:

distribute and simplify right side of equation

3= 28−14u −6u

3=28−20u

subtract 28 from both sides

3−28=−20u

−25=−20u

divide both sides by

−20/ −25 = u ⇒ u =54

sp2606 [1]3 years ago

3 0

Answer:

5/4

Step-by-step explanation:

, open the bracket

3=28-14u-6u

Collect like terms

3-28=-14u-6u

-25 =-20u

Divide both side by -20

u=-25/-20. Minus sign will cancel each other and reduce to the lowest term

u=5/4

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andreev551 [17]

Answer:

A ≈ 28.5

Step-by-step explanation:

a, b, c

P = a + b + c

Semiperimeter s = $\frac{a+b+c}{2}$

A = $\sqrt{s(s-a)(s-b)(s-c)}$

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$P_{ABC}$ = 4.3 + 2.89 + 6.81 = 14

s = 14 ÷ 2 = 7

$A_{ABC}$ = $\sqrt{7(7-4.3)(7-2.89)(7-6.81)}$ = √14.75901 ≈ 3.84

$P_{BCD}$ = 8.59 + 7.58 + 6.81 = 22.98

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2 years ago

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masya89 [10]

Answer:

x = 2

Step-by-step explanation:

How to find "x"

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5x = 10 *Divide both sides*

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I hope the helped!!!

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