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elixir [45]
3 years ago
7

I need help with a problem. Please leave an explanation

Mathematics
1 answer:
nignag [31]3 years ago
3 0

Answer:

B

Step-by-step explanation:

(1/5)b-5((2/5)a-(1/10)b)+4a

(1/5)b-(10/5)a+(5/10)b+4a

2a+(7/10)b

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Amber is making a scale drawing of a movie screen. The actual dimensions of a movie screen in her local theater are 60 ft wide a
Annette [7]

Answer:

3 inches  

60x = 9 x 20

60x = 180

x = 3        

7 0
3 years ago
Show that x = -5 is a solution to the inequality 18x – 42 ≠7x
vodka [1.7K]

Answer:

It works.

Step-by-step explanation:

11x≠42

So 42/11 is not a viable solution for x. All other real numbers work, so x=-5 is a solution.

6 0
3 years ago
If X^2= 3+2√2 what is the value of √x+1/√x
Nikolay [14]

Step-by-step explanation:

Let √x - 1/√x = a

Squaring both the sides,

x + 1/x - 2 = a^2

Putting the value,

3–2√2 + 1/(3–2√2) - 2 = a^2

a^2 = 1 - 2√2 + 1/(3–2√2)

= [(3–2√2) (1–2√2) + 1] / 3–2√2

= {3 - 8√2 + 9} / 3–2√2

= [12 - 8√2] / 3–2√2

Rationalising both the sides

= {(12 - 8√2)(3+2√2)} ÷ (9–8)

= 36 + 24√2 - 24√2 + 16(2)

= 36 - 32

=> 4

a^2 = 4

a = √4

a = 2, -2

So,

√x - 1/√x = a = 2, -2.

5 0
3 years ago
If the cost of plastering 4 walls of a room at Rs 45 per sq. m is Rs 8100, find the area of the 4 walls of the room​
olga55 [171]

Step-by-step explanation:

Rs8,100 / (Rs45 per square meter)

= 180 square meters.

The area of the 4 walls of the room is 180 sq.m.

3 0
3 years ago
the password is 5 characters long how many password possibilities are there if there are five characters are numbers
Digiron [165]
60,466,176 passwords would be the answer
4 0
4 years ago
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