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Sedbober [7]
3 years ago
15

8n+16.2=1.6 what is n

Mathematics
2 answers:
dimulka [17.4K]3 years ago
8 0
-1.825 is the correct answer

creativ13 [48]3 years ago
5 0
-1.825. you subtract 16.2 from 1.6. then divide that number by 8
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What's the equation ???
navik [9.2K]
Y = x + b.

-4 = 2 x (-3/2) + b. -4 and 2 because of (2, -4). 2 is x and -4 is y.

b = 7.

Therefore, -4 = -3/2 + 7.
4 0
2 years ago
Question 1,2, and 3 how do i factor those? Can you show the work and explain how?
DiKsa [7]

1: 3n^{2}+9n+6

notice that each part is divisible by 3

3n^{2} ÷ 3 = n^{2}

9n ÷ 3 = 3n

6 ÷ 3 = 2

so it becomes 3(n^{2} +3n+2)

3n can be rewritten as 2n+n

-you want to rewrite it into two numbers that multiply to the number that's alone (in this case 2)

which would get you

3(n^{2} +2n+n+2)

Now that it's rewritten, you can factor out n + 2 from the equation.

<u><em>the answer is </em></u>

3(n+2)(n+1)

And you can check that by multiplying (n+2)(n+1) which is n^{2} +2n+n+2 and then each of those by 3, which is 3n^{2} +6n+3n+6 or 3n^{2}+9n+6, our origional equation

2: 28+x^{2} -11x

So I rewrote this as x^{2} -11x+28 (it's the same thing, just reordered using the commutative property)

now -11x can be rewritten as -4x-7x

(remember, the two numbers should multiply to equal 28, which is our constant.)

x^{2} -4x-7x+28

now we can factor out x from the first expression and -7 from the second

x(x-4)-7(x-4)

and lastly you factor out x-4,

<u><em>which would give you</em></u>

(x-4)(x-7)

Make sure to check your work and make sure it multiplies to x^{2} -11x+28

3: 9x^{2} -12x+4

The first thing I notice when looking at this problem is that both 9 and 4 are perfect squares. Not only that, but they are the squares of 2 and 3, which are products of -12

So if you rewrite 9 as 3^{2} and 4 as 2^{2}, the equation becomes

3^{2} x^{2} -12x+2^{2}

now that 3^{2} x^{2} is ugly so it can be turned into (3x)^{2}

and -12x can be rewritten as -2*3x*2

so our equation now looks like (3x)^2-2*3x*2+2^{2}

There's a rule that says a^{2} -2ab+b^{2} = (a-b)^{2}

In our case, a=3x and b=2

<u><em>so the final answer is</em></u>

(3x-2)^2

5 0
2 years ago
The sum of three consecutive integers is 267. What is the largest integer?
vazorg [7]

Answer:

<h3>                90</h3>

Step-by-step explanation:

The middle number of three consecutive integers is thhe mean of the others, so it is one third of the sum of three consecutive integers

267:3 = <u>89 </u>  - the middle number

so:

89 - 1 = 88   -  the smallest number

89 + 1 =<u> 90</u> - the largest integer

3 0
3 years ago
Two triangles have side lengths 3,4,5 and 6,____10, respectively. The triangles are similar to each other.
Sergeu [11.5K]

Answer:

8

Step-by-step explanation:

3,4,5 and 6,_,10 are similar. what do you notice between the two? 6 is twice of 3. 10 is twice of 5. so then 4 would be half of 8.

hope i helped ;)

8 0
3 years ago
Find the midpoint of the segment with given endpoints k(1.7,-7.9) and l(8.5,-8.2)
zhenek [66]
I think it would be 5.2
6 0
3 years ago
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