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Over [174]
3 years ago
6

What is 3xy -7 when x is 4 and y is 12

Mathematics
1 answer:
garri49 [273]3 years ago
4 0
1. 137
2. 60
3. 336
hope this helped

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What is the best example of a negative correlation?
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Step-by-step explanation:

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What is 0.11 in word and expanded form?
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0+0.1+0.01/ zero and eleventh hundredths

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Under which condition will two lines not have a common solution
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Each shows two lines that make up a system of equations. If the graphs of the equations intersect, then there is one solution that is true for both equations. If the graphs of the equations do not intersect (for example, if they are parallel), then there are no solutions that are true for both equations.

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3 years ago
(8 + 5r3 - 2r2) - (8r - 8 - 6r2)<br> Simplify expression
Bingel [31]

Answer:

5r^3 + 4r^2 - 8r + 16

Step-by-step explanation:

(8 + 5r^3 - 2r^2) - (8r - 8 - 6r^2) =

The first set of parentheses is there just to show you that what is inside is a polynomial. The second set of parentheses has a second polynomial inside. The subtraction sign just to the left of the second set of parentheses shows that you are subtracting the second polynomial from the first one.

The first set of parentheses is not needed and can be dropped.

You are subtracting the second polynomial fromt he first one, so you can think of the the subtraction sign as a -1, and you need to distribute the -1 by the second polynomial, That will result in all signs inside the second set of parentheses changing.

Below, just the first set of parentheses is removed.

= 8 + 5r^3 - 2r^2 - (8r - 8 - 6r^2)

Now, we change every sign inside the second set of parentheses by distributing -1.

= 8 + 5r^3 - 2r^2 - 8r + 8 + 6r^2

Now we need to combine like terms. Like terms have the same variable part. We can rearrange the terms grouping like terms together before combining them. Also, it is customary to list the terms in descending order of degree.

= 5r^3 - 2r^2 + 6r^2 - 8r + 8 + 8

Now we combine like terms.

= 5r^3 + 4r^2 - 8r + 16

6 0
3 years ago
Is 43/10 an irrational number or rational number ?
RideAnS [48]

Answer:

Rational

Step-by-step explanation:

The definition of rational is that it can be written as a fraction where the top and bottom are integers (the bottom integer not 0).

--

43/10 is written in that form since 43 and 10 are both integers.

5 0
4 years ago
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