3 years ago

10 POINTS!! Any answers help!!

Mathematics

1 answer:

Paraphin [41]3 years ago

7 0

10. 15

11. 18

12. yes; scale factor: 2.5

13. no

14. no

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I am confused on how to do this

babymother [125]

So, u would start by expanding the bracket and ignoring the 2 at the moment.
(x+9)(x+9)= x^2-18x+81(using the foil method!

Then u would put 2 at the front to get:
2(x^2+18x+81)
= 2x^2+36x+162

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3 years ago

What is a rational and irrational number?

KIM [24]

Answer:

In mathematics, a rational number is a number such as −3/7 that can be expressed as the quotient or fraction p/q of two integers, a numerator p and a non-zero denominator q. Every integer is a rational number: for example, 5 = 5/1.

In mathematics, the irrational numbers are all the real numbers which are not rational numbers. That is, irrational numbers cannot be expressed as the ratio of two integers.

Step-by-step explanation:

hope it helps :)))

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3 years ago

How many rectangles can you make out of 18 cubes?

-Dominant- [34]

1*1*18
1*2*9
1*3*6
2*3*3

4 0

3 years ago

Read 2 more answers

If a rock falls from a height of 40 meters on Earth, the height H (in meters) after x seconds is approximately

Julli [10]

Once the rock hits the ground, we know that its height will be equal to 0m
because of this, we can replace H(x) with 0
$40 - 4.9 {x}^{2} = 0$
now all we have to do is get x by itself
so..
$4.9 {x}^{2} = 40$
then
${x}^{2} = 40 \div 4.9$
${x}^{2} = 8.1632...$
now take the square root of each side
$x = 2.857...$
2.857 seconds (rounded to the third decimal)

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3 years ago

Multiple Choice Reflect the triangle over the x-axis.

Aliun [14]

The Answer= B (-6,1)

3 0

1 year ago