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krek1111 [17]
3 years ago
12

Evaluate the expression when x=1/2 and y=-5 -2xy

Mathematics
2 answers:
Ainat [17]3 years ago
5 0

Answer: Y=-5/2

Step-by-step explanation:

Komok [63]3 years ago
4 0

Answer:

5

Step-by-step explanation:

=-2 times 1/2 times -5

=-1 times -5 (negative times negative equals positive)

=5

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Factor the polynomial completely
aliina [53]

We have 2x^2-8.




First let us factor the 2 to obtain,


2(x^2-4)


We can now see clearly that the expression inside the parentheses is a difference of two squares.



We now write the 4 as 2². So that we obtain the expression,



2(x^2-2^2)


Recall that


a^2-b^2=(a+b)(a-b)



Hence our expression becomes,




2(x+2)(x-2)



Therefore, when factored completely,




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3 years ago
Compare 6 ⋅ 108 to 3 ⋅ 106.
djverab [1.8K]

Answer:

6*10^8  is 200 times larger than  3*10^6

Step-by-step explanation:

6*10^8\ and \ 3*10^6

To compare both values we divide the exponents

\frac{6*10^8}{3*10^6}

6 divide by 3 is 2

for simplify exponents we use exponential property

a^m / a^n = a^(m-n)

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6*10^8  is 200 times larger than  3*10^6

4 0
3 years ago
Read 2 more answers
Determine whether the sequence is arithmetic if so what’s the common difference -9 -33-57-81
QveST [7]

Answer:

Arithmetic.

Common Difference: -24

Step-by-step explanation:

An arithmetic sequence is a sequence with the difference between two consecutive terms constant. The difference is called the common difference. A geometric sequence is a sequence with the ratio between two consecutive terms constant.

For arithmetic, to find the common difference we take any pair of successive numbers, and we subtract the first from the second.

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Answer:

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Step-by-step explanation:

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3 years ago
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