3 years ago

Plz Help!!!

Mathematics

1 answer:

leonid [27]3 years ago

6 0

Answer:

a and b

Step-by-step explanation:

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Can someone help me with this geometry question

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3 years ago

What are the correct steps in solving an equation -3x+1=10?

topjm [15]

Answer:

x = -3

Step-by-step explanation:

-3x + 1 = 10

=> subtract 1 from both sides

-3x = 9

=> divide both sides by -3

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Your lunch account has $22 and you spend $2.20 on it each day write an equation for the line

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Answer:

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Step-by-step explanation:

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3 years ago

The focal lengths of the objective lens and the eyepiece of a microscope are 0.50 cm and 2.0 cm, respectively, and their separat

VladimirAG [237]

Answer:

- 103.7

Step-by-step explanation:

Given:

Focal length of the eyepiece, f = 2.0 cm

Focal length of the objective lens, f' = 0.50 cm

Separation for minimum eyestrain = 6,0 cm

Image distance, v = - 25 cm

Now, from the lens formula,

$\frac{1}{f}=\frac{1}{u}+\frac{1}{v}$

here, u is the object distance

on substituting the respective values, we get

$\frac{1}{2}=\frac{1}{u}+\frac{1}{-25}$

u = 1.852 cm

also, the separation is adjusted for minimum eyestrain,

therefore, image distance for the objective lens, v' = 6 - 1.852 = 4.148 cm

Now, for the objective lens

using the lens formula, we get

$\frac{1}{0.5}=\frac{1}{u'}+\frac{1}{4.418}$

Here, u' is the distance between the physical object and objective lens

u' = 0.568 cm

Thus,

Magnification, m = $-\frac{vv'}{ff'}$

m = $-\frac{25\times4.418}{0.5\times2}$

m = - 103.7

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3 years ago

When I take half of my number and add two, I get twenty-four. What is my number?

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The answer is 46 since if you subtracted 23 and add 2 that’s what you get

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