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3 years ago

How would you find AC and DC

Mathematics

1 answer:

Harrizon [31]3 years ago

6 0

Because you know that segments AD and DC are congruent, that means that DC=20.

You also know that segments AD+DC=AC.

You can plug in all the information you know and begin to solve for x.

AD+DC=AC
20+20=3x+4
40=3x+4
36=3x
12=x

Now we know that:

x=12
AC=40
DC=20

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How many times will the digit '3' appear if we write all whole numbers from 1 to 99?

SSSSS [86.1K]

Answer:

20 times

Step-by-step explanation:

Here is a chart:

3,13,23,30,31,32,33,34,35,36,37,38,39,43,53,63,73,83,93.

It appears 20 times. Hope this helps!

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3 years ago

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Nesterboy [21]

Answer:

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2 years ago

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Is it possible to have a negative value for sin but a positive value for tangent

bonufazy [111]

Answer:

Yes

Step-by-step explanation:

Tan = sin / cos

If sin is negative, ans cos is negative, then tangent is positive.

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3 years ago

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalen

alexandr1967 [171]

The new equation after the expression equivalent to x from the first equation is substituted into the second equation is: $2(-4y-9)+5y=-6$

Step-by-step explanation:

We will solve the initial steps for substitution method for finding the correct answer

Given equations are:

$x+4y = -9\ \ \ \ Eqn1\\2x+5y=-6\ \ \ Eqn2$

From equation one

$x+4y = -9\\x+4y-4y = -9-4y\\x = -4y-9$

Putting x = -4y-9 in equation 2

$2(-4y-9)+5y=-6$

Hence,

The new equation after the expression equivalent to x from the first equation is substituted into the second equation is: $2(-4y-9)+5y=-6$

Keywords: Linear equations, variables

Learn more about linear equations at:

#LearnwithBrainly

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3 years ago

What is 50h+150/25 ?

Alla [95]

Answer:

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Step-by-step explanation:

50h+ (150/25) <--- Divide/ simplify

=50h+6

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3 years ago