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3 years ago

Plzzz i need help helpppppppppppppppppppppp

Mathematics

2 answers:

butalik [34]3 years ago

5 0

Answer:

x+(x-23)

Step-by-step explanation:

The sum of a number

And 23 less than that number

(x-23)

Put it together

x+(x-23)

Stella [2.4K]3 years ago

3 0

Answer:

b is the correct expression

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(2^8 * 3^-5 * 6^0)^-2 * (3^-2/ 2^3) ^4 * 2^28

11Alexandr11 [23.1K]

$\left(2^8\cdot \:3^{-5}\cdot \:1\right)^{-2}=\left(1\cdot \frac{256}{243}\right)^{-2}=\left(\frac{256}{243}\right)^{-2}=\left(\frac{243}{256}\right)^2$

$\left(2^8\cdot \:3^{-5}\cdot \:6^0\right)^{-2}\left(\frac{3^{-2}}{2^3}\right)^4\cdot \:2^{28}$

$=2^{28}\left(\frac{3^{-2}}{2^3}\right)^4\left(3^{-5}\cdot \:2^8\cdot \:1\right)^{-2}$

Consider

$\left(2^8\cdot \:3^{-5}\cdot \:1\right)^{-2}=\left(1\cdot \frac{256}{243}\right)^{-2}=\left(\frac{243}{256}\right)^2=\frac{243^2}{256^2}$

$=2^{28}\left(\frac{3^{-2}}{2^3}\right)^4\frac{243^2}{256^2}$

$=2^{28}\cdot \frac{1}{2^{12}\cdot \:3^8}\cdot \frac{243^2}{256^2}$

$=\frac{243^2\cdot \:1\cdot \:2^{28}}{256^2\cdot \:3^8\cdot \:2^{12}}$

$=\frac{2^{16}\cdot \:243^2}{3^8\cdot \:256^2}$

$=\frac{2^{16}\cdot \:3^{10}}{2^{16}\cdot \:3^8}$

$=3^2$

$=9$

6 0

3 years ago

Alex and Freddy collect stamps. The number of stamps in Alex’s collection is in ratio 3:5 to the number of stamps in Freddy’s co

tiny-mole [99]

Suppose Alex has 3x stamps, Freddy has 5x stamps. After Freddy gives Alex 10 stamps, Alex has 3x+10 while Freddy has 5x-10
the new ratio is 7 to 9, so we have the equation: (3x+10)/(5x-10)=7/9
9(3x+10)=7(5x-10)
27x+90=35x-70
160=8x
x=20
So Alex has 3*20=60 stamps while Freddy has 5*20=100. Together they have 160

6 0

3 years ago

Read 2 more answers

When graphing the coordinate (3,4) you would...

Assoli18 [71]

The answer is B

You would first move 3 coordinates over on the x axis and then 4 coordinates up the y axis.

3 0

3 years ago

I would appreciate the help on all of these :)

Maurinko [17]

Answer:

Pythagoras theorem states that c²=a²+b²