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3 years ago

Which image does not have reflective symmetry?

Mathematics

2 answers:

kow [346]3 years ago

5 0

Answer:

THE TOP/ FIRST ONE

ki77a [65]3 years ago

5 0

Answer:

The correct answer is option 2

Step-by-step explanation:

For a shape to bbe reflective it needs to symmetrical on both sides, which the shape for option 2, does not.

Hope this helps :)

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Can you please find the angles with the angles shown? Like the

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Step-by-step explanation:

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Identify the parts relating to A

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Answer:

FG is a secant,

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DH is a secant,

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3 years ago

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A tank contains 250 liters of fluid in which 40 grams of salt is dissolved. Brine containing 1 gram of salt per liter is then pu

VashaNatasha [74]

Answer:

$A(t)=250-210e^{-\frac{t}{50}}$

Step-by-step explanation:

We are given that

Volume,V=250 L

Mass of salt=m=40 g

Brine containing 1 g per liter

Pumped into the tank at the rate=5 L/min

We have to find the number A(t) of grams of salt in the tank at time t.

Rate of change of salt in the tank

$\frac{dA}{dt}=$ Rate in-Rate out

Rate in=5 L/min

Rate out= $\frac{A}{250}\times 5=\frac{A}{50}$ L/min

$\frac{dA}{dt}=5-\frac{A}{50}=\frac{250-A}{50}$

$\int \frac{50dA}{250-A}=\int dt$

$-50ln(250-A)=t+C$

Using the formula

$\int \frac{dx}{x}=ln x$

A=40 and t=0

$-50ln(250-40)=0+C$

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$-50ln(250-A)=t-50ln(210)$

$-50ln(250-A)+50ln(210)=t$

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$t=50ln\frac{210}{250-A}$

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8 0

4 years ago

I need help with the equation inserted in the picture.

sergij07 [2.7K]

Answer:

x = 4

-4x+21 => 5

Step-by-step explanation:

The given triangle in the picture is isosceles triangle which means that two sides of the triangle are equal.

So,

$Side\ 1: -4x+21\\Side\ 2: -4x+21\\Side\ 3: 6\\Perimeter = 16$

Now

Putting all the values in equation for perimeter

$Side\ 1+Side\ 2+Side\ 3 = 16\\-4x+21 -4x+21 + 6 =16\\-8x +48 = 16\\-8x = 16-48\\-8x = -32\\\frac{-8x}{-8} = \frac{-32}{-8}\\x = 4$

Putting x = 4 in side 1

$=-4(4)+21\\= -16+21\\=5$

Hence,

x = 4

-4x+21 => 5

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3 years ago

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