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2 years ago

when asked to factor the trinomial x^2-18x+81 a student gives the answer (x-9(x+9) which of the following statements is true

Mathematics

2 answers:

Alex17521 [72]2 years ago

5 0

the answer is incorrect; the plus sign should be a minus sign

charle [14.2K]2 years ago

3 0

(x - 9)(x + 9) would give you x^2 - 81 when you get a plus and minus like that after you factor the middle term is canceled out so the answer would be (x - 9)^2

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Given the equations f(x) = x + 4 and d (x) = 2x + 5, find: f (1) + d (2)

Lina20 [59]

1 = x + 4
3 = x

2 = 2x + 5
3 = 2x
3/2= x

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2 years ago

Please help sneakynuggests

JulsSmile [24]

Answer:

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1 year ago

When Belinda asked him to what pages his book was opened, he replied that the product of the facing pages was 87,912. To what pa

Liono4ka [1.6K]

Answer:

His book was opened at Page no.296 and Page no.297

Step-by-step explanation:

Let the page number of one page be x

Page number of page facing page no. x = x+1

We are given that the product of the facing pages was 87,912.

So, x(x+1)=87912

$x^2+x=87912$

$x^2+x-87912=0$

$x^2-296x+297x-87912=0$

$x(x-296)+297(x-296)=0$

(x+297)(x-296)=0

x=296,-297

Since Page no. cannot be negative

So, x=296

x+1=296+1=297

So, his book was opened at Page no.296 and Page no.297

5 0

2 years ago

A machine in a deli cooks hot dogs by rotating them past a heat sourse .one rotation takes 0.75 minutes and it takes 9 minutes t

Virty [35]

I believe it would be 12 because 9 min divided by .75 a rotation gets 12 rotations

3 0

2 years ago

Use vertical calculation to find each product:<br> (5.4) x (2.4) =<br> (1.67) x (3.5) =

Bad White [126]

Answer: your answer for the equation: ((5.4) x (2.4) = 12.96

for the second one it would be ((1.67) x (3.5) = 5.845

~I hope this is correct and has helped you, have a great day/night~

Step-by-step explanation:

6 0

2 years ago