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3 years ago

I don't get this one too can someone explain it please

Mathematics

1 answer:

lukranit [14]3 years ago

5 0

Answer:

15ab

Step-by-step explanation:

When you multiply out the square (p+q)^2, you get the trinomial ...

(p +q)^2 = p^2 + 2pq + q^2

Your binomial is (3a+2.5b), so you have ...

p = 3a

q = 2.5b

and the trinomial you get when you multiply it out is ...

(3a)^2 + 2(3a)(2.5b) + (2.5b)^2

= 9a^2 + 15ab + 6.25b^2

The first and last of these terms are shown on the right side of the given expression, so to finish out the identity, you need to replace * with 15ab.

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A hotel has $504 to buy new pillows. If the cost of each pillow is $6, how many pillows will the hotel be able to buy? A) 78 B)

Naddik [55]

Hello there!
You can use the equation:
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Hope this helped! :D

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2 years ago

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Two numbers that multiply to 20 and add up to -12

telo118 [61]

-10 and -2

Because -10-2= -12 and -10 x -2 = 20
Hope this helps :)

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3 years ago

A student in a statistics class asks students in a long lunch line about their opinions about the school cafeteria. The sample t

Paladinen [302]

Answer:

The correct option is;

D. Biased

Step-by-step explanation:

A sampling method in which the members of the sample are not representative of the population, such that some members of the population have a higher or lower probability within the sample which is indicative that not all members of the population are sampled

A biased sample is a non random sample and the can lead to misleading data conclusion

In the question, the sampling of student opinion about the school cafeteria among students who are on the lunch line and so prefer the school cafeteria leaves out the portion of the population that get their lunch from alternative sources.

7 0

3 years ago

Could anyone help me with these questions ASAP?

FrozenT [24]

8 is b because a circle is 360.

5 0

2 years ago

Given the following geometric sequence, find the 12th term: {2, -4, 8, ...}.

BaLLatris [955]

2 times what = -4?
-2 does
-2 x 2 = -4

-4 time what = 8?
Again, -2.
-2 x -4 = 8

You could do this over and over again or make a table, or you can make a function.
f(n) = f(1) • r $^{n-1}$
f(1) in this case is 2.
f(n) = 2 • r $^{n-1}$
r is rate of change, which is -2.
f(n) = 2 • -2 $^{n-1}$
To find the 12th number in the sequence, just substitute n for 12.
f(12) = 2 • -2 $^{12-1}$
f(12) = 2 • -2 $^{11}$
-2^11 = -2048
2 x -2048 = -4096
So the 12th number in the sequence will be -4096.

3 0

3 years ago