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dem82 [27]
2 years ago
15

Rút gọn (x-4) (x-3) -x(x+5) +82

Mathematics
1 answer:
WINSTONCH [101]2 years ago
5 0

Answer:

-12x + 94

Step-by-step explanation:

Simplify:

\left(x-4\right)\left(x-3\right)-x\left(x+5\right)+82

=x^2-7x+12-x\left(x+5\right)+82

=x^2-7x+12-x^2-5x+82

=x^2-x^2-7x-5x+12+82

=-7x-5x+12+82

=-7x-5x+94

=-12x+94

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Which pair shows equivalent expressions?
Dmitry_Shevchenko [17]

Which pair shows equivalent expressions?

A.2(2/5x + 2)=2 2/5x + 1

B.2(2/5x + 2)=4/5x + 4

C.2(2/5x + 4)=4/5x + 2

D.2(2/5x + 4)=2 2/5x + 8

Solution:

2(\frac{2}{5}x + 2)

Let us distribute 2 inside the parenthesis.

That is, we use distributive property:

a(b+c)=ab+ac

2(\frac{2}{5}x + 2) =\frac{2*2}{5}x+2*2

So, 2(\frac{2}{5}x + 2) =\frac{4}{5}x+4

Answer:Option (b)

2(\frac{2}{5}x+4)

Applying distributive property, a(b+c)=ab+ac

2(\frac{2}{5}x+4) =2*\frac{2}{5} x+2*4

2(\frac{2}{5}x+4) =\frac{2*2}{5} x+2*4

2(\frac{2}{5}x+4) =\frac{4}{5} x+8

So, Option (B) is correct.

8 0
3 years ago
Read 2 more answers
the left and right page numbers of an open book are two consecutive integers whose sum is 589. find these page numbers
kramer

Answer:

267 and 322

Step-by-step explanation:

6 0
3 years ago
ILL BRAINLIEST YOU PLEASE HELP ME
liubo4ka [24]
15.8 I believe. Since 20 isn’t a option 15 is the closest. Good luck I have good faith I have you the right answer
8 0
3 years ago
Peyton is a sprinter who can run the 40-yard dash in 4.5 seconds. he converts his speed into miles per hour, as shown below.
oksano4ka [1.4K]
The correct question is
<span>Peyton is a sprinter who can run the 40-yard dash in 4.5 seconds. He converts his speed into miles per hour, as shown below
</span>Which ratio is incorrectly written to convert his speed? 

the picture in the attached figure

we know that
The term (5280 ft/1 mi)  is incorrect
"Feet"<span> needs to be on the bottom to cancel with the previous term. 
</span>"Mile"<span> needs to be on top in the numerator so that the answer can be expressed in "miles per hour"
</span>
the correct term is (1 mi/5280 ft)

5 0
3 years ago
A movie theater charges $10 and 50 cent per ticket and five dollars per bucket of popcorn.You never buy the popcorn because you
cestrela7 [59]

Answer: Yes


Step-by-step explanation:

Yes it is, your ratio would be 10.50:1

$10.50 spent on every one ticket. if you buy more than one, a fraction would still simplify down to 10.50/1.

if you were to buy the popcorn then no it wouldn't be.

7 0
4 years ago
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