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kolbaska11 [484]
3 years ago
10

What is the sum of the difference?

Mathematics
1 answer:
Alona [7]3 years ago
8 0

Answer:

A. 9x^4 and 3x^5y

Step-by-step explanation:

there are two ways to solve this:

first way:

You can solve this my substituting numbers for x and y in this case i used 2 for x and 3 for y and see which one is equal to the original equations

the second way is the regular way

when you add or subtract numbers with variables and exponents you want to add the constants and add the exponents in this case 5x^{4} +4x^2 is the same as (5x+4x)^(4+4) = 9x^4and you can do the same process for subtraction

12x^{5}y-9x^5 y\\(12x-9x)^(5+5)*y= 3x^5y

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Answer:

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A dvd is marked down 15% the regular price is $12 what is the sale price?
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Multiply the original price by 85%

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When c=_6 and x=2 x-8c
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3 years ago
2. Suppose (220)_b and (251)_b are the squares of consecutive integers. Determine b.
Andrei [34K]

Let x and x+1 be these consecutive integers. For some base b, we can write

(x_{10})^2=220_b=2b^2+2b

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If

x^2=2b^2+2b

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Now,

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(because the base has to be non-zero)

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3 years ago
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