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cricket20 [7]
3 years ago
8

Simplify the expression: –3(9 − x) =

Mathematics
1 answer:
steposvetlana [31]3 years ago
6 0

Answer:

Expand  -3(9-x): -27 + 3x

Step-by-step explanation:

-3(9-x)

Apply the distributive law: a(b-c)=ab-ac

a = -3, b=9, c=x

=-3*9-(-3)x

Apply minus - plus rules:

-(-a)=a

= -3*9+3x

Multiply the numbers: 3 * 9 = 27

=-27+3x

Hope this helps! If so, may I get Brainliest and a Thanks?

Thank you, have a good one! =)

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JT = 3x + 5,<br> CT = 69, and<br> CJ = 4x + 8,<br> Find JT.
mart [117]

Answer:

Step-by-step explanation:

3x+5+4x+8=69

7x+5+8=69

7x+13=69

   -13   -13

7x=56

7x/7=56/7

x=8

3x+5

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JT=29

4 0
3 years ago
Sin(-x)= -cos x for all values of x. True or false
kogti [31]

Answer:

That's incorrect. The simplest way to show this is by evaluating the functions at a given point. Let's say x=0, then:

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5 0
4 years ago
Read 2 more answers
On Monday, during a one day sale, the price of a suit was decreased by 20%. On Tuesday, the price of the suit was changed back t
nignag [31]

Answer:

25%

Step-by-step explanation:

If we consider the original price of the piece of suit is x.

Given that, on Monday during a one day sale, the price of the suit was decreased by 20%.

Therefore, the new price of the suit on Monday is x( 1 - \frac{20}{100}) = 0.8x.

Now, the price of the suit on Tuesday was changed back to the original price i.e. x.

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tamaranim1 [39]

Answer:

x=30

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Multiply each side by 2

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3 years ago
A mother is three times as old as her son, and in 11 years she will be just twice his age. Find their present ages.
brilliants [131]
The mother is 33 years old and the child is 11 because if you divide 33 by 11 you will get 3. Then if you add 11 to both ages you will get 44 for the mother and 22 for the child. Finally you divide 44 by 22 to get 2.
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