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sergij07 [2.7K]
3 years ago
7

What is (5x-7)-(3x-4)?

Mathematics
1 answer:
Mekhanik [1.2K]3 years ago
5 0
You will need to subtract 3x from 5x, then since there is a minus sign in front of the 7 it will count as a -7, so u add 7 cross it out and then add 7 to the -4(which is also negative cause it has a minus sign in front) and then you have ur answer

5x-3x=2x
7+ -4= 3
Answer: 2x-3
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A plane travels at 3400 miles in 8 hours. How far would it travel in 6 hours?
Svetlanka [38]
The plane would travel 2550 miles
8 0
3 years ago
what is the simplified form of the following expression? Assume X 0 and y 0. 2(^4 sqrt 16 x) -2(^4 sqrt 2y )+3 (^4 sqrt 81x ) -4
eduard

For this case we have the following expression:

2(\sqrt[4]{16x})-2(\sqrt[4]{2y})+3(\sqrt[4]{81x})-4(\sqrt[4]{32y})

Rewriting the numbers within the roots we have:

2(\sqrt[4]{2*2*2*2x})-2(\sqrt[4]{2y})+3(\sqrt[4]{3*3*3*3x})-4(\sqrt[4]{2*2*2*2*2y})

Then, by properties of powers we have:

2(\sqrt[4]{2^4x})-2(\sqrt[4]{2y})+3(\sqrt[4]{3^4x})-4(\sqrt[4]{2^42y})

Then, by radical properties we have:

2(2\sqrt[4]{x})-2(\sqrt[4]{2y})+3(3\sqrt[4]{x})-4(2\sqrt[4]{2y})

Rewriting the expression we have:

4\sqrt[4]{x}-2\sqrt[4]{2y}+9\sqrt[4]{x}-8\sqrt[4]{2y}

Finally, adding similar terms we have:

(4+9)\sqrt[4]{x}-(2+8)\sqrt[4]{2y}

13\sqrt[4]{x}-10\sqrt[4]{2y}

Answer:

The simplified form of the expression is:

13\sqrt[4]{x}-10\sqrt[4]{2y}

7 0
3 years ago
Read 2 more answers
Please help I got 20mins​
Llana [10]

Answer/Step-by-step explanation:

Scale factor: 1/4

<em>AC = DF  and 10 ÷ 2.5 = 4</em>

<em>10 x 1/4 = 2.5</em>

<em />

DE length: 5

<em>AB = DE </em>

<em>20 x 1/4 = 5</em>

<em />

BC length: 30

<em>EF = BC</em>

<em>(Because EF is the dilation) 7.5 x 4 = 30</em>

8 0
3 years ago
WILL GIVE BRAINLIEST!! Bill is paid bi-weekly and has a gross pay of $1500 for each pay period. He pays Social Security at a rat
Tom [10]

$1142.25

Step-by-step explanation:

Gross pay per week =  $1500

Social security deducted = 6.2% = $93

Medicare deducted = 1.45% = $21.75

Deductions for combined taxes = 16.2% = $243

Hence total deductions made from the gross salary

= 93+21.75+ 243

= $357.75

Hence, Net pay

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= $1142.25

4 0
4 years ago
Y = 5sin (2x) + 4<br><br> What's the amplitude, period, phase shift, and vertical shift?
Sliva [168]
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Every time the "argument" of the sin increases by 2π
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The first period goes from zero until  2x = 2π .
So the length of the period is π .

The phase shift is the value of the angle when x=0.
That's zero.

The sin itself wiggles up and down, regularly and symmetrically,
above and below the x-axis (y=0).  In this equation, the whole thing
is shifted up 4 units by that +4 on the end, so it's wiggling up and down
above and below the line y=4.  The vertical shift is +4 .

If this function were an electrical signal, we would say that its
period is π seconds, its frequency is 1/π Hz, and it has an
AC amplitude of 5 riding on a DC component of 4 .
8 0
4 years ago
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