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Cerrena [4.2K]
3 years ago
9

Write an algebraic expression for the situation.

Mathematics
1 answer:
natali 33 [55]3 years ago
6 0

Answer:

28/d is the answer from my side

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What are the solutions to the equation (x + 2)^2 = 49?
Mekhanik [1.2K]

Answer:

X= 5, -9

Step-by-step explanation:

(X+2)² =49

Expand the bracket,


(X+2) (X+2)= 49

Apply the distributive property;

X(X+2) +2 (X+2) =49

X²+2X+2X+4=49

X²+4X+4=49

Move 49 to the left side of the equation;

X²+4X+4-49=0

X²+4X-45=0

Apply Factorisation method;

Consider the form

a²+bx+c=0  

Find two numbers whose sum is equal to b and whose product is equal to c.
Comparing with our equation;

B =4 and C =45

We can use 9 and -5, this is because ;

9+(-5)=4 and 9*(-5)= 45.

Replace X +4X-45=0 with (X-5) (X+9)=0

Therefore;

X-5=0

X+9=0

Moving to the left side of the equation;

Therefore X= 5 and -9

8 0
2 years ago
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What is the average of 2,4,6,8<br>the answer plus 2​
Mrrafil [7]

Answer:

3.26

Step-by-step explanation:

3.26666666667

7 0
2 years ago
Help me with number 1 I don't get it
IgorLugansk [536]
The answer will be 250 because you divide 2 by 500
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17 = a - 3 - За<br> Answer pleassse
Shkiper50 [21]

Answer:

-10 = a

Step-by-step explanation:

17 = a - 3 - За

Combine like terms

17 = -3 -2a

Add 3 to each side

17+3 = -3-2a+3

20 = -2a

Divide by -2

20/-2 = -2a/-2

-10 = a

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2 years ago
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Answer:

x

f

Step-by-step explanation:

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