2 years ago

What’s the answer???

Mathematics

1 answer:

Korvikt [17]2 years ago

5 0

Answer:

dude unit test reviews dont matter you can fail that and move on

Step-by-step explanation:

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Firdavs [7]

I think it’s B I’m sorry if I’m wrong

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Plot the points and decide if the rectangular cakes are scale drawings of each other.

pentagon [3]

Answer:

1 side would be 4.0, then the next 4.0, the very botton is a 90 degree

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2 years ago

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Write an expression that is equivalent to 2/8b+(3/8b+4/5)

pogonyaev

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i dont know im wondering to o-o

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What is the value of y when x = 43 A. 87 B. 85 C. 49 D. 45

BartSMP [9]

Answer:

A x

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Step-by-step explanation:

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2 years ago

Harmonic mean if a number h such that (h-a)/(b-h)=a/b Prove h is H(a,b) iff satisfies either relation a. (1/a)-(1/h) = (1/h) - (

Fudgin [204]

A.

$\displaystyle\frac1a-\frac1h=\frac1h-\frac1b$
$\implies\displaystyle\frac{h-a}{ah}=\frac{b-h}{bh}$
$\implies\displaystyle\frac{h-a}{b-h}=\frac{ah}{bh}$
$\implies\displaystyle\frac{h-a}{b-h}=\frac ab$

b.

$\displaystyle h=\frac{2ab}{a+b}$
$\displaystyle\implies\frac{h-a}{b-h}=\frac{\frac{2ab}{a+b}-a}{b-\frac{2ab}{a+b}}$
$\displaystyle\implies\frac{h-a}{b-h}=\frac{2ab-a(a+b)}{b(a+b)-2ab}$
$\displaystyle\implies\frac{h-a}{b-h}=\frac{ab-a^2}{b^2-ab}$
$\displaystyle\implies\frac{h-a}{b-h}=\frac{a(b-a)}{b(b-a)}$
$\displaystyle\implies\frac{h-a}{b-h}=\frac ab$

The other direction can be proved by following the manipulations in the reverse order.

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2 years ago