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Alexeev081 [22]
3 years ago
10

Find 3x-y-3z if x=-2, y=1, z=-2

Mathematics
2 answers:
horsena [70]3 years ago
8 0
Substitute everything in first


3(-2)-1-3(-2)


Then simplify


-6-1+6 = -1


The answer is -1
Mice21 [21]3 years ago
4 0
3 x (-2) - 1 - 3 x (-2) 
(Simplify by: Multiplying a positive and a negitive equals a negative: 
(+) x (-) = (+)) 
Multiplying two negitives equals a positive:
(-) x (-) = (+) )
-3 x 2 - 1 + 3 x 2
(Eliminate the opposites)
Answer: -1
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there are 9 boys in a class of 14 students. a)what is the ratio of boys to girls. b) what is the ratio of girls to all students
ElenaW [278]

Answer:

a). 9 to 5

b). 5 to 14

Step-by-step explanation:

If there are 9 boys then there are 5 girls because 14 - 9 = 5.

So, there are 5 girls of 14 students in the class.

4 0
2 years ago
Which of the following is a polynomial with rootsnegative square root of 5, square root of 5, and 3
Scrat [10]

Answer:

P(x) = x³ - 3x² - 5x + 15

Step-by-step explanation:

∵ The roots of the polynomial are -√5 , √5 , 3

∴ The polynomial has 3 factors:

  (x - √5) , (x + √5) , (x - 3)

∴ P(x) = (x - √5)(x + √5)(x - 3)

          = (x² + √5x - √5x - 5)(x - 3)

          = (x² - 5)(x - 3) = x³ - 3x² - 5x + 15

∴ P(x) = x³ - 3x² - 5x + 15

3 0
2 years ago
Help if u can.
adelina 88 [10]

Answer:

It would be the 4th one and the last one I think

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Over what interval will the immediate value theorem apply
koban [17]

Answer:

Any [a,b] that does NOT include the x-value 3 in it.

Either an [a,b] entirely to the left of 3, or

an  [a,b] entirely to the right of 3

Step-by-step explanation:

The intermediate value theorem requires for the function for which the intermediate value is calculated, to be continuous in a closed interval [a,b]. Therefore, for the graph of the function shown in your problem, the intermediate value theorem will apply as long as the interval [a,b] does NOT contain "3", which is the x-value where the function shows a discontinuity.

Then any [a,b] entirely to the left of 3 (that is any [a,b] where b < 3; or on the other hand any [a,b] completely to the right of 3 (that is any [a,b} where a > 3, will be fine for the intermediate value theorem to apply.

6 0
2 years ago
need a lot of help
marishachu [46]
2.60 x 12 3/4

2.60 x 12.75 (convert to decimal)

= $33.15, which is not listed.
3 0
2 years ago
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