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xxTIMURxx [149]
3 years ago
14

Simplify the expression 7.8n²+0.5+9n-.0.4-7n+n²​

Mathematics
2 answers:
charle [14.2K]3 years ago
8 0

Answer:

8.8n² + 2n + 0.1

Step-by-step explanation:

For this expression, all you have to do is combine like terms, which means to combine terms with n² with each other, terms with n with each other, and so on.

7.8n² + 0.5 + 9n - 0.4 - 7n + n²

Now, put the n² terms, n terms, and constants (no n) with each other.

7.8n² + n² + 9n - 7n + 0.5 - 0.4

Now you can add and subtract to combine like terms.

7.8n² + n² + 9n - 7n + 0.5 - 0.4

8.8n² + 2n + 0.1

And that's your answer.

Natali [406]3 years ago
4 0

The final answer for this question would be.....

8.8n^2+16n+0.1

Hope this helps!!!!

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Answer:

√23/√45 or √23/3√5

Step-by-step explanation:

Cosine is adjacent over hypotenuse. Angle W has an adjacent side of WU(√23) and WV .You know the adjacent but not the hypotenuse, so you will use the formula a^2+b^2=c^2 to find the hypotenuse. Plug in the sides for A and B -> (√23)^2+(√22)^2=c^2. Simplify it --> 23+22=c^2 --> 45=c^2. Solve for C alone (not c^2). √45=c. Then use the cosine formula (adjacent/hypotenuse) to plug in the numbers.

4 0
3 years ago
Answer: ______pencils,_____ rulers.
Paul [167]
15 pencils - £1.20
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4 0
3 years ago
A humanities professor assigns letter grades on a test according to the following scheme. A: Top 6% of scores B: Scores below th
uysha [10]

Answer:

Limits for B scores

( 79,2 ; 92 )

Step-by-step explanation:

The interval we are looking for is between 6 % and 59%

p₁  = 6 %     p₁ = 0,06

As this point is at the right tail of the bell we better look for

p = 1- 0,06     p = 0,94

In z-table z score for 0,94062  is:    z₁ = 1,56      ( 0,94062 ≈ 0,94 )

Doing the same to find z₂ score for 59%  or 0,59

In z-table again

p =  0,59      

z₂ = 0,023

Now we know

1,56 * σ  = x₁ - 79

1,56*8,4 + 79 = x₁

x₁  =  92,10        or  x₁ = 92

And

0,023*8,4 + 79  = x₂

x₂ = 79,19         or    x₂ = 79,2

                 

4 0
3 years ago
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harina [27]

Answer:

There is no answer. I'm sorry but more information is needed in order to find the answer.

Step-by-step explanation:

However, the problem can be written.

It will look like:

3n - 1.

Since the number can be anything, this is not an answerable question because it must equal a number on the right side of the equation.

7 0
3 years ago
How many miles equals 26 km
Sliva [168]

Given data:

The given distance is d=26 km.

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Multiply the above expression with 26 on both sides.

26(1 km)= 26(0.621 miles)

26 km= 16.146 miles.

Thus, 26 kilometer is equal to 16.146 miles

4 0
1 year ago
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