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Lera25 [3.4K]
3 years ago
15

Which expression is equivalent to the given expression? -2x +8x -9 +4x +7x2 +2 A. B. C. D.

Mathematics
1 answer:
Crazy boy [7]3 years ago
6 0

Answer:

The answer is "7x^2 +10x -7"

Step-by-step explanation:

Let the given value is:

\to \bold{-2x +8x -9 +4x +7x^2 +2}\\\\

Solving the given value:

\to7x^2 -2x +8x +4x-9 +2\\\\\to7x^2 +10x -7\\\\\to7x^2 +10x -7\\\\

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What are the possible values of x in the equation | x + 5 | = 4?​
olga55 [171]

Answer:

x= -1

Step-by-step explanation:

x+5=4 or x+5= -4

x= -9 or x= -1

8 0
3 years ago
Irene has a checking account. On Monday she writes a $160 check for groceries. Then she deposits $125 into her account. Finally,
anastassius [24]
First you can see that there are 3 numbers 160,125,and 40 you can add 125 and 40 because they are both checks so then after you add you get $165 in checks do you then subtract $125 which is how much she put in and you get $40. So, she has $-40
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3 years ago
How can we write an algebraic expression to describe a two-digit number whose unit's digit is 5 less than the ten's digit?
vodomira [7]

Answer:

Let x= the ones digit

Then x+5=the tens digit

Hence the equation is: 10(x+5)+x=x+5+x+63

10(x+5)+x=x+5+x+63

10x+50+x=2x+68

11x+50=2x+68

-2x-50  -2x-50

---------------------

       9x=18  Divide both sides of the equation by 9

         x=2

Hence the number is 10(2+5)+2=10(7)+2=70+2=72.

8 0
3 years ago
pls help me with this if you know it also to explain it thanks Solve the equation -21 + 70n = 77 for n.
gogolik [260]

Answer:

n = 1 2/5

Step-by-step explanation:

-21 + 70n = 77

Add 21 to each side

-21+21 + 70n = 77 +21

70n = 98

Divide each side by 70

70n/70 = 98/70

n =98/70

n = 70/70 +28/70

n = 1 + 2/5

n = 1 2/5

6 0
4 years ago
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