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stellarik [79]
2 years ago
14

FUDGEE help pleasee

Mathematics
2 answers:
Nastasia [14]2 years ago
4 0

Answer:

x= -7 and x= -3

Step-by-step explanation:

(x+7)(x+3)=0 (Think about the numbers that will add to 10 and multiply to 21)

x= -7 and x= -3

hoa [83]2 years ago
4 0

Answer:

x = −3 or x = −7

Step-by-step explanation:

Let's solve your equation step-by-step.

x^2 +  10x + 21 = 0

Step 1: Factor left side of equation.

(x+3) (x+7) = 0

Step 2: Set factors equal to 0.

x + 3 = 0 or x + 7 = 0

x = −3 or x = −7

I hope this helps you with your assignment and have a fantastic day! :D

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Romashka [77]

Answer: it is only possible if N = 2.

Step-by-step explanation:

if you have N  heads up coins.

turn one, you turn N -1 coins up.

Now you have N - 1 coins tails up and one coin heads up.

Second turn, you turn N - 1 coins, (if you select the same N - 1 coins as before, you will end in the initial situation, so now we will change one coin, this time we will select the coin that is still heads up and we will leave one of the tails up unchanged)

Then we have N - 2 coins heads up and 2 coins tails up.

Now, we can select any N -1 coins to flip, and we will end with with N - 1 coins tail up and 1 coin heads up.

and this cycle will repeat.

Then the only situation is having N = 2.

Becuase when we have N -2 coins heads up and 2 coins tails up we will have: N - 2 = 0, so we have 0 coins heads up and 2 coins tails up.

This means that the statement is only true if N = 2.

6 0
2 years ago
What is the reason for each step in the solution of the equation?
MrRa [10]
<span>3(x+2)= 4x+1 |Given
3x+6= 4x+1   |Distributive
−x+6= 1         |SPOE (Subtraction Property of Equality)
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3 0
3 years ago
Sympilfy 31/-8...........
ArbitrLikvidat [17]

Answer:

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8 0
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Read 2 more answers
Pls help im really bad at math no links pls​
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Answer:

-\frac{1}{2}

Step-by-step explanation:

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-\frac{3}{6}               add

-\frac{1}{2}               reduce

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