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3 years ago

8

How to write 7+2-3-8 in sigma notation

1 answer:

Valentin [98]3 years ago

7 0

(7+2-3-8)=0
N=7
Brainliest pts
Hope this helps

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Click on the solution set below until the correct one is displayed.

AURORKA [14]

Answer:

{ } or empty set.

Step-by-step explanation:

The solutions should be where the two lines intersect, but in this case, the parallel lines never intersect. That means that they have no solutions.

Hope this helps!

7 0

3 years ago

20 + 4y = 8<br> -21 2y = 1<br> Find the solution to the system of equations shown above by graphing,

Sonbull [250]

Note: Your system of equations is missing some details. Since the procedure is same so it should not be matter as it would still make your understand the concept. So I am assuming you have the following system of equations:

$20x\:+\:4y\:=\:8$

$-21x+\:2y\:=\:1$

Answer:

The two lines intersect at (3/31, 47/31) which is the solution to this system of equations.

The graph of the solution is also attached below.

Step-by-step explanation:

Given the system of the equations

$20x\:+\:4y\:=\:8$

$-21x+\:2y\:=\:1$

The solution will be the point of intersection of two lines. So we need to solve the system of the equations to find the point of intersection in order to graph the solution.

Solving

$\begin{bmatrix}20x+4y=8\\ -21x+2y=1\end{bmatrix}$

$\mathrm{Isolate}\:x\:\mathrm{for}\:20x+4y=8:\quad x=\frac{2-y}{5}$

$\mathrm{Subsititute\:}x=\frac{2-y}{5}$

$\begin{bmatrix}-21\cdot \frac{2-y}{5}+2y=1\end{bmatrix}$

$\mathrm{Isolate}\:y\:\mathrm{for}\:-21\frac{2-y}{5}+2y=1$

$-21\cdot \frac{2-y}{5}+2y=1$

$-\frac{42}{5}+\frac{31y}{5}=1$ ∵ $-21\cdot \frac{2-y}{5}+2y= -\frac{42}{5}+\frac{31y}{5}$

$\mathrm{Multiply\:both\:sides\:by\:}5$

$-\frac{42}{5}\cdot \:5+\frac{31y}{5}\cdot \:5=1\cdot \:5$

$-42+31y=5$

$31y=47$

$\mathrm{Divide\:both\:sides\:by\:}31$

$\frac{31y}{31}=\frac{47}{31}$

$y=\frac{47}{31}$

$\mathrm{For\:}x=\frac{2-y}{5}$

$\mathrm{Subsititute\:}y=\frac{47}{31}$

$x=\frac{2-\frac{47}{31}}{5}$

as

$\frac{2-\frac{47}{31}}{5}=\frac{3}{31}$

so

$x=\frac{3}{31}$

$\mathrm{The\:solutions\:to\:the\:system\:of\:equations\:are:}$

$y=\frac{47}{31},\:x=\frac{3}{31}$

Therefore, the two lines intersect at (3/31, 47/31) which is the solution to this system of equations.

The graph of the solution is also attached below.

7 0

3 years ago

8000000000000000 minus 280000000000000 In standard form

zavuch27 [327]

Answer:

7.72 * 10^15

Step-by-step explanation:

8*10^15 - 2.8*10^14 = 7.72 * 10^15

5 0

3 years ago

Andrew has three times as many pencils as Noah and five pens he has 17 pens and pencils altogether how many pencils does Noah ha

Novay_Z [31]

9514 1404 393

Answer:

4

Step-by-step explanation:

The distributive property does not appear to be involved in this question.

Let n represent the number of Noah's pencils. Then Andrew's total is ...

3n +5 = 17

3n = 12 . . . . . subtract 5 from both sides

n = 4 . . . . . . divide both sides by 3

Noah has 4 pencils.

7 0

3 years ago

Which of the following terms correctly describe the figure given below? Check all that apply.

Marta_Voda [28]

A. prism

E. rectangular solid

5 0

4 years ago