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hjlf
4 years ago
15

Solve the system for (y) x+5y =-4; -x+5y=-16

Mathematics
1 answer:
kotykmax [81]4 years ago
8 0

Answer:

x - 5y= -4 (equ...1)

-x + 5y=-16 (equ...2)

From equ... 1

x= -4 + 5y (equ... 3)

Substitute equ...3 into equ...2

-4 + 5y + 5y=-16

-4 + 10y=-16

Collect like terms

10y=-16 + 4

10y=-12

Divide both side by 10

y= -12/10 or -1.2

Substitute y= -1.2

x=-4 + 5y

x=-4 + 5(-1.2)

x=-4 - 6

x= -10

Hence,x= -10,y=-1.2 or-12/10

Step-by-step explanation:

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The answer is 10.8 meters of thread
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3 years ago
Duru has an ice-cream stand, which she opens on days that are forecasted to be warmer than 10°C.
Amanda [17]

Answer:

P(c(t)) =  20t-120

Step-by-step explanation:

Given

P(n) = 2n - 20

C(t) = 50 + 10(t - 10)

Required

Determine P(C(t))

The implication of the question is to solve for P(C(t))

Given that

C(t) = 50 + 10(t - 10) and P(n) = 2n - 20

P(c(t)) would be

P(c(t)) = 2(50 + 10(t - 10)) - 20

P(c(t)) = 2(50 + 10t - 100) - 20

Collect Like Terms

P(c(t)) = 2(50  - 100+ 10t) - 20

P(c(t)) = 2(-50+ 10t) - 20

Open Bracket

P(c(t)) = -100+ 20t - 20

Collect Like Terms

P(c(t)) =  20t-100 - 20

P(c(t)) =  20t-120

8 0
3 years ago
Please help!<br><br> Worth 10 points!
bonufazy [111]
10% of 140 is 14. 
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cross multiply and you get 10x = 1400
divide 1400 by 10 and you get 140
6 0
3 years ago
Read 2 more answers
The ratio of the length to width of a rectangle is 3:4 the perimeter is 56 in, find the length and the width
Verizon [17]

Answer: Length is 12in and width is 16in

Let's use the ratio method!

3+3+4+4 is 14

Let's think the length as," L " and the width as," W "

L / 56 = 3/14

L = 3/14 * 56

L = 12

And for width:

W / 56 = 4/14

W =4/14 * 56

W = 16

There you go! We did it!

Now make sure to click the Brainliest button if I gave the correct answer

7 0
2 years ago
-
melamori03 [73]

Answer:

In graph theory and computer science, an adjacency matrix is a square matrix used to represent a finite graph. The elements of the matrix indicate whether pairs of vertices are adjacent or not in the graph.

In the special case of a finite simple graph, the adjacency matrix is a (0,1)-matrix with zeros on its diagonal. If the graph is undirected, the adjacency matrix is symmetric. The relationship between a graph and the eigenvalues and eigenvectors of its adjacency matrix is studied in spectral graph theory.

The adjacency matrix should be distinguished from the incidence matrix for a graph, a different matrix representation whose elements indicate whether vertex–edge pairs are incident or not, and degree matrix which contains information about the degree of each vertex.

3 0
3 years ago
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