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Cerrena [4.2K]
4 years ago
7

Add and simplify (4-3n-5n^2)+(-2+n-3n^2)

Mathematics
2 answers:
Alina [70]4 years ago
7 0
The answer is D : 2-2n-8n^2
Effectus [21]4 years ago
4 0

Answer:

The answer is D) 2-2n-8n^2


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The average high temperature in Valerie's city during the month of December is 50°F.
tino4ka555 [31]

Answer:

18

Step-by-step explanation:

50-32=18

8 0
3 years ago
Determine the sum of the first 9 terms in the geometric series where r= -0.25 and a1= 256.
Damm [24]

\bf \qquad \qquad \textit{sum of a finite geometric sequence} \\\\ S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad  \begin{cases} n=n^{th}\ term\\ a_1=\textit{first term's value}\\ r=\textit{common ratio}\\ ----------\\ r=-0.25\\ a_1=256\\ n=9 \end{cases}

\bf S_9=256\left(\cfrac{1-(-0.25)^9}{1-(-0.25)}  \right)\implies S_9=256\left( \cfrac{1+0.25^9}{1+0.25} \right) \\\\\\ S_9=256\left(  \cfrac{52429}{65536}\right)\implies S_9=\cfrac{52429}{256}\implies S_9=204.80078125

4 0
3 years ago
Read 2 more answers
Phil needs to run at least 30 miles this week for his training. If he has already run 18 miles this week, then how many miles sh
liraira [26]

Answer:

4 miles

Step-by-step explanation:

30-18=12

12÷3=4

hope this helped :)

8 0
3 years ago
Write the equation of the line that goes through the point (6,-4) and is parallel to y = -x + 1. 1 3
omeli [17]

9514 1404 393

Answer:

  y = -x +2

Step-by-step explanation:

The parallel line will have the same slope; only the constant will be different. We can find that constant using the given point.

  y = -x +b

  -4 = -6 + b . . . substitute for x and y

  2 = b . . . . . . add 6

The desired equation is ...

  y = -x +2

6 0
3 years ago
HeLpPLZZZ (Edge). Which line on the graph represents the information in the table? Cost of Pencils Number of Pencils Total Cost
Sedaia [141]

Answer:

Line D- (4, 1) and (8, 2).

Step-by-step explanation:

The table representing the information is given below:

\left|\begin{array}{c|c}$Number of Pencils(x)&$Total Cost(in $)(y)\\----&----\\2&0.50\\4&1.00\\6&1.50\\8&2.00\end{array}\right|

On the coordinate plane, the x-axis is labeled Number of pencils and the y-axis is labeled total cost in dollars.

Therefore, any point that matches with the (x,y) pair on the table represents the information in the table.

Only Line D matches with the pair (4,1) and (8,2)

4 0
3 years ago
Read 2 more answers
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