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Zepler [3.9K]
3 years ago
10

How to use exponents to write 9,800,100 in expanded form

Mathematics
1 answer:
zalisa [80]3 years ago
3 0
<span>(100 cubed x 9) + (100 squared x 8) + 10 squared = 9800100</span>
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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

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Step-by-step explanation:

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A $528 video game console is on sale for 15% off. if sales tax is 6.25% what is total coast
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Answer:

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Step-by-step explanation:

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