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asambeis [7]
3 years ago
10

The ___________ of a lens or mirror is a rotational symmetry axis of the surfaces.

Mathematics
1 answer:
densk [106]3 years ago
5 0

Answer:

Optical axis

Step-by-step explanation:

Optical axis is the rotational symmetry axis of the surfaces.

A line with a certain degree of rotational symmetry is called as the optical axis in an optical system.

It is the straight line that passes through the geometric center of the lens and joins two curvature centers of its surfaces.

It is also called as the principal axis.

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Step-by-step explanation:

hi

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2 years ago
What is the equation of a line when the slope is -1/2 and the y-intercept is 0.
tangare [24]

Answer:

y = -1/2x + 0

y = mx+b

Step-by-step explanation:

8 0
3 years ago
I need help... I honestly don’t know.
Serhud [2]

Answer:

∡ABC=55°

Step-by-step explanation:

<u>Step 1: Identify all angles</u>

∠A=(x+45)°

∠B=(6x+5)°

∠C=(3x)°

∠ABC=(180-∠B)°=(180-(6x+5))°

<u>Step 2: Use the Triangle Angle Sum Theorem</u>

∠A+∠ABC+∠C=180°

(x+45)+(180-(6x+5))+(3x)=180

x+45+180-6x-5+3x=180

-2x+45+180-5=180

-2x+45-5=0

-2x+40=0

-2x=-40

x=20

<u>Step 3: Plug in x=20 for ∠ABC</u>

∠ABC=(180-(6x+5))°

(180-6(20)-5)°

(180-120-5)°

(60-5)°

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8 0
2 years ago
Read 2 more answers
What is the answer to 2(x+1)&lt;x+3
Temka [501]
2x+2 < x+3
2x-x < 3-2 
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5 0
2 years ago
You were born, your mother deposited 2000 in an account that pays 5% simple interest. How much would the balance be in your acco
leonid [27]

Answer:

C

Step-by-step explanation:

the formula for simple interest is given as A=P(1+rt), where A is the final balance, P is the initial principal balance (the amount of money that you start out with), r is the annual interest rate, and t is the time

we know that the mom deposited 2000 into an account when the person was born. This is our initial principal balance (the amount of money started out with)

substitute that value into the formula to get:

A=2000(1+rt)

we also know the rate, which is 5% and the time, which is 18

5%=0.05 (we need it as a decimal)

so substituting the values into the equation:

A=2000(1+0.05*18)

A=2000(1+0.9)

A=2000(1.9)

A=3,800

therefore the answer is C

Hope this helps!

8 0
3 years ago
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