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Oksana_A [137]
3 years ago
14

PLEASE HELP AND EXPLAIN!

Mathematics
1 answer:
Neko [114]3 years ago
8 0

Answer:

12 years old.

Step-by-step explanation:

1) 2x+x=18

2) Now solve 2x+x=18

Add alike terms

3x=18

Now divide both sides by 3 (3x/3 and 18/3)

x=6

So Hannah is 6 years old. Her sister must be 12.

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W(x)=x+4; find w(xt4)
shusha [124]

Answer:  W(x + 4) = x + 8

<u>Step-by-step explanation:</u>

I am assuming the "t" is supposed to be an addition sign "+"

w(x + 4) means to replace all of the x's in the given function with x + 4

W(x) = x + 4

W(x + 4) = (x + 4) + 4

             = x + 8

7 0
3 years ago
The waitress and the hostess at a restaurant share the tips at the end of the shift. The average amount earned in tips between t
Lynna [10]
Ratio of Waitress to hostess money = 45/30 = 3/2

So, the ratio of waitress earning to total earning = 3/5

If they earn 350, waitress will receive = 350 * 3/5 = 210

So, your final answer is $210

Hope this helps!
5 0
4 years ago
Read 2 more answers
Antonio earns $6 an hour helping his grandmother. Write and solve an equation to find out how many hours she needs to work to ea
Ilia_Sergeevich [38]
48/6 = 8 (just divide)
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7 0
3 years ago
What type of heat transfer is responsible for an ice cube melting in your hand?​
Orlov [11]

Answer:

conduction

Step-by-step explanation:

The heat in the hand conducts into the ice to cause it to melt.

4 0
3 years ago
Difference of Squares gives which complex factors for the expression +3?
Oduvanchick [21]

The difference of squares is:

(x+i√3)(x-i√3)

So the correct option is the last one, D.

<h3>Which expression gives x^2 + 3?</h3>

For a complex number:

Z = a + b*i

We define the complex conjugate of Z as:

Z' = a - b*i

Such that the product between the complex number and its complex conjugate gives:

Z*Z' = a^2 + b^2

Now, of you look at option D, you can see we have the product of a number and its conjugate, then we can write the product and use the above rule to get:

(x + i\sqrt{3} )*(x - i\sqrt{3} ) = x^2 + (\sqrt{3} )^2 = x^2 + 3

Which is what we wanted to get, so that is the correct option.

If you want to learn more about complex numbers:

brainly.com/question/10662770

#SPJ1

3 0
2 years ago
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